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-rw-r--r--share/man/man4/Makefile4
-rw-r--r--share/man/man4/ciss.49
-rw-r--r--share/man/man4/dtrace_callout_execute.468
-rw-r--r--share/man/man4/dtrace_vfs.497
-rw-r--r--share/man/man4/ice.4372
-rw-r--r--share/man/man4/mpr.46
-rw-r--r--share/man/man5/pf.conf.58
-rw-r--r--share/man/man7/d.7124
-rw-r--r--share/man/man9/VFS.93
-rw-r--r--share/man/man9/atomic.954
-rw-r--r--share/man/man9/buf.997
-rw-r--r--share/man/man9/callout.94
-rw-r--r--share/man/man9/make_dev.912
13 files changed, 663 insertions, 195 deletions
diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index fe744776d9b3..34edf6ad455d 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -1005,6 +1005,7 @@ _ccd.4= ccd.4
.if ${MK_CDDL} != "no"
_dtrace_provs= dtrace_audit.4 \
+ dtrace_callout_execute.4 \
dtrace_dtrace.4 \
dtrace_fbt.4 \
dtrace_io.4 \
@@ -1017,7 +1018,8 @@ _dtrace_provs= dtrace_audit.4 \
dtrace_sctp.4 \
dtrace_tcp.4 \
dtrace_udp.4 \
- dtrace_udplite.4
+ dtrace_udplite.4 \
+ dtrace_vfs.4
MLINKS+= dtrace_audit.4 dtaudit.4
.endif
diff --git a/share/man/man4/ciss.4 b/share/man/man4/ciss.4
index 28d6556ecd85..d731aaddad38 100644
--- a/share/man/man4/ciss.4
+++ b/share/man/man4/ciss.4
@@ -1,7 +1,7 @@
.\" Written by Tom Rhodes
.\" This file is in the public domain.
.\"
-.Dd January 26, 2012
+.Dd November 6, 2025
.Dt CISS 4
.Os
.Sh NAME
@@ -87,9 +87,10 @@ might be solved by updating the firmware and/or setting the
.Va hw.ciss.nop_message_heartbeat
tunable to non-zero at boot time.
.Sh HARDWARE
-Controllers supported by the
+The
.Nm
-driver include:
+driver supports controllers implementing
+Common Interface for SCSI-3 Support Open Specification v1.04, including:
.Pp
.Bl -bullet -compact
.It
@@ -145,6 +146,8 @@ HP Smart Array P430i
.It
HP Smart Array P431
.It
+HP Smart Array P440ar
+.It
HP Smart Array P530
.It
HP Smart Array P531
diff --git a/share/man/man4/dtrace_callout_execute.4 b/share/man/man4/dtrace_callout_execute.4
new file mode 100644
index 000000000000..1154ed066b97
--- /dev/null
+++ b/share/man/man4/dtrace_callout_execute.4
@@ -0,0 +1,68 @@
+.\"
+.\" Copyright (c) 2025 Mateusz Piotrowski <0mp@FreeBSD.org>
+.\"
+.\" SPDX-License-Identifier: BSD-2-Clause
+.\"
+.Dd November 4, 2025
+.Dt DTRACE_CALLOUT_EXECUTE 4
+.Os
+.Sh NAME
+.Nm dtrace_callout_execute
+.Nd a DTrace provider for the callout API
+.Sh SYNOPSIS
+.Nm callout_execute Ns Cm :kernel::callout_start
+.Nm callout_execute Ns Cm :kernel::callout_end
+.Sh DESCRIPTION
+The
+.Nm callout_execute
+provider allows for tracing the
+.Xr callout 9
+mechanism.
+.Pp
+The
+.Nm callout_execute Ns Cm :kernel::callout_start
+probe fires just before a callout.
+.Pp
+The
+.Nm callout_execute Ns Cm :kernel::callout_end
+probe fires right after a callout.
+.Pp
+The only argument to the
+.Nm callout_execute
+probes,
+.Fa args[0] ,
+is a callout handler
+.Ft struct callout *
+of the invoked callout.
+.Sh EXAMPLES
+.Ss Example 1: Graph of Callout Execution Time
+The following
+.Xr d 7
+script generates a distribution graph of
+.Xr callout 9
+execution times:
+.Bd -literal -offset 2n
+callout_execute:::callout_start
+{
+ self->cstart = timestamp;
+}
+
+callout_execute:::callout_end
+{
+ @length = quantize(timestamp - self->cstart);
+}
+.Ed
+.Sh SEE ALSO
+.Xr dtrace 1 ,
+.Xr tracing 7 ,
+.Xr callout 9 ,
+.Xr SDT 9
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm callout_execute
+provider was written by
+.An Robert N. M. Watson Aq Mt rwatson@FreeBSD.org .
+.Pp
+This manual page was written by
+.An Mateusz Piotrowski Aq Mt 0mp@FreeBSD.org .
diff --git a/share/man/man4/dtrace_vfs.4 b/share/man/man4/dtrace_vfs.4
new file mode 100644
index 000000000000..528d5da42f3d
--- /dev/null
+++ b/share/man/man4/dtrace_vfs.4
@@ -0,0 +1,97 @@
+.\"
+.\" Copyright (c) 2025 Mateusz Piotrowski <0mp@FreeBSD.org>
+.\"
+.\" SPDX-License-Identifier: BSD-2-Clause
+.\"
+.Dd November 3, 2025
+.Dt DTRACE_VFS 4
+.Os
+.Sh NAME
+.Nm dtrace_vfs
+.Nd a DTrace provider for Virtual File System
+.Sh SYNOPSIS
+.Sm off
+.Nm vfs Cm : fplookup : Ar function Cm : Ar name
+.Nm vfs Cm : namecache : Ar function Cm : Ar name
+.Nm vfs Cm : namei : Ar function Cm : Ar name
+.Nm vfs Cm : vop : Ar function Cm : Ar name
+.Sm on
+.Sh DESCRIPTION
+The DTrace
+.Nm vfs
+provider allows users to trace events in the
+.Xr VFS 9
+layer, the kernel interface for file systems on
+.Fx .
+.Pp
+Run
+.Ql dtrace -l -P vfs
+to list all
+.Nm vfs
+probes.
+Add
+.Fl v
+to generate program stability reports,
+which contain information about the number of probe arguments and their types.
+.Pp
+The
+.Cm fplookup
+module defines a single probe,
+.Fn vfs:fplookup:lookup:done "struct nameidata *ndp" "int line" "bool status_code" ,
+that instruments the fast path lookup code in
+.Xr VFS 9 .
+.Pp
+The
+.Cm namecache
+module provides probes related to the
+.Xr VFS 9
+cache.
+Consult the source code in
+.Pa src/sys/kern/vfs_cache.c
+for more details.
+.Pp
+The
+.Cm namei
+module manages probes related to pathname translation and lookup operations.
+Refer to
+.Xr namei 9
+to learn more.
+.Pp
+The
+.Cm vop
+module contains probes related to the functions responsible for
+.Xr vnode 9
+operations.
+.Sh COMPATIBILITY
+This provider is specific to
+.Fx .
+.Sh EXAMPLES
+Check what lookups failed to be handled in a lockless manner:
+.Bd -literal -offset 2n
+# dtrace -n 'vfs:fplookup:lookup:done { @[arg1, arg2] = count(); }'
+.Ed
+.Sh SEE ALSO
+.Xr dtrace 1 ,
+.Xr d 7 ,
+.Xr SDT 9 ,
+.Xr namei 9 ,
+.Xr VFS 9
+.Rs
+.%A Brendan Gregg
+.%A Jim Mauro
+.%B DTrace: Dynamic Tracing in Oracle Solaris, Mac OS X and FreeBSD
+.%I Prentice Hall
+.%P pp. 335\(en351
+.%D 2011
+.%U https://www.brendangregg.com/dtracebook/
+.Re
+.Sh AUTHORS
+.An -nosplit
+The
+.Fx
+.Nm vfs
+provider was written by
+.An Robert Watson Aq Mt rwatson@FreeBSD.org .
+.Pp
+This manual page was written by
+.An Mateusz Piotrowski Aq Mt 0mp@FreeBSD.org .
diff --git a/share/man/man4/ice.4 b/share/man/man4/ice.4
index c7675e627726..a54a6b3fd6f3 100644
--- a/share/man/man4/ice.4
+++ b/share/man/man4/ice.4
@@ -32,12 +32,12 @@
.\"
.\" * Other names and brands may be claimed as the property of others.
.\"
-.Dd October 3, 2025
+.Dd November 5, 2025
.Dt ICE 4
.Os
.Sh NAME
.Nm ice
-.Nd Intel Ethernet 800 Series Driver
+.Nd Intel Ethernet 800 Series 1GbE to 200GbE driver
.Sh SYNOPSIS
.Cd device iflib
.Cd device ice
@@ -62,42 +62,75 @@ or
.Cd dev.ice.#.pba_number
.Cd dev.ice.#.hw.mac.*
.Sh DESCRIPTION
-.Ss Features
The
.Nm
driver provides support for any PCI Express adapter or LOM
-(LAN On Motherboard)
-in the Intel\(rg Ethernet 800 Series.
-As of this writing, the series includes devices with these model numbers:
+.Pq LAN On Motherboard
+in the Intel Ethernet 800 Series.
+.Pp
+The following topics are covered in this manual:
.Pp
.Bl -bullet -compact
.It
-Intel\(rg Ethernet Controller E810\-C
+.Sx Features
+.It
+.Sx Dynamic Device Personalization
+.It
+.Sx Jumbo Frames
+.It
+.Sx Remote Direct Memory Access
+.It
+.Sx RDMA Monitoring
+.It
+.Sx Data Center Bridging
+.It
+.Sx L3 QoS Mode
+.It
+.Sx Firmware Link Layer Discovery Protocol Agent
+.It
+.Sx Link-Level Flow Control
+.It
+.Sx Forward Error Correction
+.It
+.Sx Speed and Duplex Configuration
+.It
+.Sx Disabling physical link when the interface is brought down
+.It
+.Sx Firmware Logging
+.It
+.Sx Debug Dump
+.It
+.Sx Debugging PHY Statistics
.It
-Intel\(rg Ethernet Controller E810\-XXV
+.Sx Transmit Balancing
.It
-Intel\(rg Ethernet Connection E822\-C
+.Sx Thermal Monitoring
.It
-Intel\(rg Ethernet Connection E822\-L
+.Sx Network Memory Buffer Allocation
.It
-Intel\(rg Ethernet Connection E823\-C
+.Sx Additional Utilities
.It
-Intel\(rg Ethernet Connection E823\-L
+.Sx Optics and auto-negotiation
.It
-Intel\(rg Ethernet Connection E825\-C
+.Sx PCI-Express Slot Bandwidth
.It
-Intel\(rg Ethernet Connection E830\-C
+.Sx HARDWARE
.It
-Intel\(rg Ethernet Connection E830\-CC
+.Sx LOADER TUNABLES
.It
-Intel\(rg Ethernet Connection E830\-L
+.Sx SYSCTL VARIABLES
.It
-Intel\(rg Ethernet Connection E830\-XXV
+.Sx INTERRUPT STORMS
+.It
+.Sx IOVCTL OPTIONS
+.It
+.Sx SUPPORT
+.It
+.Sx SEE ALSO
+.It
+.Sx HISTORY
.El
-.Pp
-For questions related to hardware requirements, refer to the documentation
-supplied with the adapter.
-.Pp
+.Ss Features
Support for Jumbo Frames is provided via the interface MTU setting.
Selecting an MTU larger than 1500 bytes with the
.Xr ifconfig 8
@@ -141,7 +174,7 @@ downloading a new driver or DDP package.
Safe Mode only applies to the affected physical function and does not impact
any other PFs.
See the
-.Dq Intel\(rg Ethernet Adapters and Devices User Guide
+.Dq Intel Ethernet Adapters and Devices User Guide
for more details on DDP and Safe Mode.
.Pp
If issues are encountered with the DDP package file, an updated driver or
@@ -153,8 +186,8 @@ The DDP package cannot be updated if any PF drivers are already loaded.
To overwrite a package, unload all PFs and then reload the driver with the
new package.
.Pp
-Only one DDP package can be used per driver, even if more than one
-device installed that uses the driver.
+Only one DDP package can be used per driver,
+even if more than one installed device uses the driver.
.Pp
Only the first loaded PF per device can download a package for that device.
.Ss Jumbo Frames
@@ -187,7 +220,7 @@ RoCEv2 (RDMA over Converged Ethernet) protocols.
The major difference is that iWARP performs RDMA over TCP, while RoCEv2 uses
UDP.
.Pp
-Devices based on the Intel\(rg Ethernet 800 Series do not support RDMA when
+Devices based on the Intel Ethernet 800 Series do not support RDMA when
operating in multiport mode with more than 4 ports.
.Pp
For detailed installation and configuration information for RDMA, see
@@ -200,7 +233,7 @@ analysis tools like
.Xr tcpdump 1 .
This mirroring may impact performance.
.Pp
-To use RDMA monitoring, more MSI\-X interrupts may need to be reserved.
+To use RDMA monitoring, more MSI-X interrupts may need to be reserved.
Before the
.Nm
driver loads, configure the following tunable provided by
@@ -209,7 +242,7 @@ driver loads, configure the following tunable provided by
dev.ice.<interface #>.iflib.use_extra_msix_vectors=4
.Ed
.Pp
-The number of extra MSI\-X interrupt vectors may need to be adjusted.
+The number of extra MSI-X interrupt vectors may need to be adjusted.
.Pp
To create/delete the interface:
.Bd -literal -offset indent
@@ -245,14 +278,15 @@ DCB is normally configured on the network using the DCBX protocol (802.1Qaz), a
specialization of LLDP (802.1AB). The
.Nm
driver supports the following mutually exclusive variants of DCBX support:
+.Pp
.Bl -bullet -compact
.It
-Firmware\-based LLDP Agent
+Firmware-based LLDP Agent
.It
-Software\-based LLDP Agent
+Software-based LLDP Agent
.El
.Pp
-In firmware\-based mode, firmware intercepts all LLDP traffic and handles DCBX
+In firmware-based mode, firmware intercepts all LLDP traffic and handles DCBX
negotiation transparently for the user.
In this mode, the adapter operates in
.Dq willing
@@ -262,25 +296,25 @@ The local user can only query the negotiated DCB configuration.
For information on configuring DCBX parameters on a switch, please consult the
switch manufacturer'ss documentation.
.Pp
-In software\-based mode, LLDP traffic is forwarded to the network stack and user
+In software-based mode, LLDP traffic is forwarded to the network stack and user
space, where a software agent can handle it.
In this mode, the adapter can operate in
.Dq nonwilling
DCBX mode and DCB configuration can be both queried and set locally.
-This mode requires the FW\-based LLDP Agent to be disabled.
+This mode requires the FW-based LLDP Agent to be disabled.
.Pp
-Firmware\-based mode and software\-based mode are controlled by the
+Firmware-based mode and software-based mode are controlled by the
.Dq fw_lldp_agent
sysctl.
Refer to the Firmware Link Layer Discovery Protocol Agent section for more
information.
.Pp
-Link\-level flow control and priority flow control are mutually exclusive.
+Link-level flow control and priority flow control are mutually exclusive.
The ice driver will disable link flow control when priority flow control
is enabled on any traffic class (TC).
It will disable priority flow control when link flow control is enabled.
.Pp
-To enable/disable priority flow control in software\-based DCBX mode:
+To enable/disable priority flow control in software-based DCBX mode:
.Bd -literal -offset indent
sysctl dev.ice.<interface #>.pfc=1 (or 0 to disable)
.Ed
@@ -307,10 +341,10 @@ For example, to map UP 0 and 1 to TC 0, UP 2 and 3 to TC 1, UP 4 and
.Bd -literal -offset indent
sysctl dev.ice.<interface #>.up2tc_map=0,0,1,1,2,2,3,3
.Ed
-.Ss L3 QoS mode
+.Ss L3 QoS Mode
The
.Nm
-driver supports setting DSCP\-based Layer 3 Quality of Service (L3 QoS)
+driver supports setting DSCP-based Layer 3 Quality of Service (L3 QoS)
in the PF driver.
The driver initializes in L2 QoS mode by default; L3 QoS is disabled by
default.
@@ -319,13 +353,13 @@ Use the following sysctl to enable or disable L3 QoS:
sysctl dev.ice.<interface #>.pfc_mode=1 (or 0 to disable)
.Ed
.Pp
-If the L3 QoS mode is disabled, it returns to L2 QoS mode.
+If L3 QoS mode is disabled, it returns to L2 QoS mode.
.Pp
To map a DSCP value to a traffic class, separate the values by commas.
-For example, to map DSCPs 0\-3 and DSCP 8 to DCB TCs 0\-3 and 4, respectively:
+For example, to map DSCPs 0-3 and DSCP 8 to DCB TCs 0-3 and 4, respectively:
.Bd -literal -offset indent
-sysctl dev.ice.<interface #>.dscp2tc_map.0\-7=0,1,2,3,0,0,0,0
-sysctl dev.ice.<interface #>.dscp2tc_map.8\-15=4,0,0,0,0,0,0,0
+sysctl dev.ice.<interface #>.dscp2tc_map.0-7=0,1,2,3,0,0,0,0
+sysctl dev.ice.<interface #>.dscp2tc_map.8-15=4,0,0,0,0,0,0,0
.Ed
.Pp
To change the DSCP mapping back to the default traffic class, set all the
@@ -336,25 +370,25 @@ To view the currently configured mappings, use the following:
sysctl dev.ice.<interface #>.dscp2tc_map
.Ed
.Pp
-L3 QoS mode is not available when FW\-LLDP is enabled.
+L3 QoS mode is not available when FW-LLDP is enabled.
.Pp
-FW\-LLDP cannot be enabled if L3 QoS mode is active.
+FW-LLDP cannot be enabled if L3 QoS mode is active.
.Pp
-Disable FW\-LLDP before switching to L3 QoS mode.
+Disable FW-LLDP before switching to L3 QoS mode.
.Pp
Refer to the
.Sx Firmware Link Layer Discovery Protocol Agent
-section in this README for more information on disabling FW\-LLDP.
+section in this README for more information on disabling FW-LLDP.
.Ss Firmware Link Layer Discovery Protocol Agent
-Use sysctl to change FW\-LLDP settings.
-The FW\-LLDP setting is per port and persists across boots.
+Use sysctl to change FW-LLDP settings.
+The FW-LLDP setting is per port and persists across boots.
.Pp
-To enable the FW\-LLDP Agent:
+To enable the FW-LLDP Agent:
.Bd -literal -offset indent
sysctl dev.ice.<interface #>.fw_lldp_agent=1
.Ed
.Pp
-To disable the FW\-LLDP Agebt:
+To disable the FW-LLDP Agebt:
.Bd -literal -offset indent
sysctl dev.ice.<interface #>.fw_lldp_agent=0
.Ed
@@ -368,11 +402,14 @@ The UEFI HII LLDP Agent attribute must be enabled for this setting
to take effect.
If the
.Dq LLDP AGENT
-attribute is set to disabled, the FW\-LLDP Agent cannot be enabled from the
+attribute is set to disabled, the FW-LLDP Agent cannot be enabled from the
driver.
-.Ss Link\-Level Flow Control (LFC)
-Ethernet Flow Control (IEEE 802.3x) can be configured with sysctl to enable
-receiving and transmitting pause frames for
+.Ss Link-Level Flow Control
+Ethernet Flow Control
+.Pq IEEE 802.3x or LFC
+can be configured with
+.Xr sysctl 8
+to enable receiving and transmitting pause frames for
.Nm .
When transmit is enabled, pause frames are generated when the receive packet
buffer crosses a predefined threshold.
@@ -434,7 +471,7 @@ in case the link partner does not have FEC enabled or is not FEC capable:
sysctl dev.ice.<interface #>.allow_no_fec_modules_in_auto=1
.Ed
.Pp
-NOTE: This flag is currently not supported on the Intel\(rg Ethernet 830
+NOTE: This flag is currently not supported on the Intel Ethernet 830
Series.
.Pp
To show the current FEC settings that are negotiated on the link:
@@ -449,7 +486,7 @@ sysctl dev.ice.<interface #>.requested_fec
.Pp
To see the valid FEC modes for the link:
.Bd -literal -offset indent
-sysctl \-d dev.ice.<interface #>.requested_fec
+sysctl -d dev.ice.<interface #>.requested_fec
.Ed
.Ss Speed and Duplex Configuration
The speed and duplex settings cannot be hard set.
@@ -464,17 +501,17 @@ Supported speeds will vary by device.
Depending on the speeds the device supports, valid bits used in a speed mask
could include:
.Bd -literal -offset indent
-0x0 \- Auto
-0x2 \- 100 Mbps
-0x4 \- 1 Gbps
-0x8 \- 2.5 Gbps
-0x10 \- 5 Gbps
-0x20 \- 10 Gbps
-0x80 \- 25 Gbps
-0x100 \- 40 Gbps
-0x200 \- 50 Gbps
-0x400 \- 100 Gbps
-0x800 \- 200 Gbps
+0x0 - Auto
+0x2 - 100 Mbps
+0x4 - 1 Gbps
+0x8 - 2.5 Gbps
+0x10 - 5 Gbps
+0x20 - 10 Gbps
+0x80 - 25 Gbps
+0x100 - 40 Gbps
+0x200 - 50 Gbps
+0x400 - 100 Gbps
+0x800 - 200 Gbps
.Ed
.Ss Disabling physical link when the interface is brought down
When the
@@ -494,7 +531,7 @@ The
driver allows for the generation of firmware logs for supported categories of
events, to help debug issues with Customer Support.
Refer to the
-.Dq Intel\(rg Ethernet Adapters and Devices User Guide
+.Dq Intel Ethernet Adapters and Devices User Guide
for an overview of this feature and additional tips.
.Pp
At a high level, to capture a firmware log:
@@ -553,7 +590,7 @@ DCBx (Bit 11)
.It Va dcb
DCB (Bit 12)
.It Va xlr
-XLR (function\-level resets; Bit 13)
+XLR (function-level resets; Bit 13)
.It Va nvm
NVM (Bit 14)
.It Va auth
@@ -561,7 +598,7 @@ Authentication (Bit 15)
.It Va vpd
Vital Product Data (Bit 16)
.It Va iosf
-Intel On\-Chip System Fabric (Bit 17)
+Intel On-Chip System Fabric (Bit 17)
.It Va parser
Parser (Bit 18)
.It Va sw
@@ -649,8 +686,8 @@ dmesg > log_output
NOTE: Logging a large number of modules or too high of a verbosity level will
add extraneous messages to dmesg and could hinder debug efforts.
.Ss Debug Dump
-Intel\(rg Ethernet 800 Series devices support debug dump, which allows
-gathering of runtime register values from the firmware for
+Intel Ethernet 800 Series devices support debug dump,
+which allows gathering of runtime register values from the firmware for
.Dq clusters
of events and then write the results to a single dump file, for debugging
complicated issues in the field.
@@ -662,7 +699,7 @@ Debug dump captures the current state of the specified cluster(s) and is a
stateless snapshot of the whole device.
.Pp
NOTE: Like with firmware logs, the contents of the debug dump are not
-human\-readable.
+human-readable.
Work with Customer Support to decode the file.
.Pp
Debug dump is per device, not per PF.
@@ -685,7 +722,7 @@ pass the
argument.
For example:
.Bd -literal -offset indent
-sysctl \-d dev.ice.0.debug.dump.clusters
+sysctl -d dev.ice.0.debug.dump.clusters
.Ed
.Pp
Possible bitmask values for
@@ -693,24 +730,24 @@ Possible bitmask values for
are:
.Bl -bullet -compact
.It
-0 \- Dump all clusters (only supported on Intel\(rg Ethernet E810 Series and
-Intel\(rg Ethernet E830 Series)
+0 - Dump all clusters (only supported on Intel Ethernet E810 Series and
+Intel Ethernet E830 Series)
.It
-0x1 \- Switch
+0x1 - Switch
.It
-0x2 \- ACL
+0x2 - ACL
.It
-0x4 \- Tx Scheduler
+0x4 - Tx Scheduler
.It
-0x8 \- Profile Configuration
+0x8 - Profile Configuration
.It
-0x20 \- Link
+0x20 - Link
.It
-0x80 \- DCB
+0x80 - DCB
.It
-0x100 \- L2P
+0x100 - L2P
.It
-0x400000 \- Manageability Transactions (only supported on Intel\(rg Ethernet
+0x400000 - Manageability Transactions (only supported on Intel Ethernet
E810 Series)
.El
.Pp
@@ -726,11 +763,11 @@ sysctl dev.ice.0.debug.dump.clusters=0
.Pp
NOTE: Using 0 will skip Manageability Transactions data.
.Pp
-If a single cluster is not specified, the driver will dump all clusters to a
-single file.
+If a single cluster is not specified,
+the driver will dump all clusters to a single file.
Issue the debug dump command, using the following:
.Bd -literal -offset indent
-sysctl \-b dev.ice.<interface #>.debug.dump.dump=1 > dump.bin
+sysctl -b dev.ice.<interface #>.debug.dump.dump=1 > dump.bin
.Ed
.Pp
NOTE: The driver will not receive the command if the sysctl is not set to
@@ -765,13 +802,13 @@ Use the following sysctl to read the PHY registers:
sysctl dev.ice.<interface #>.debug.phy_statistics
.Ed
.Pp
-NOTE: The contents of the registers are not human\-readable.
+NOTE: The contents of the registers are not human-readable.
Like with firmware logs and debug dump, work with Customer Support
to decode the file.
.Ss Transmit Balancing
Some Intel(R) Ethernet 800 Series devices allow for enabling a transmit
balancing feature to improve transmit performance under certain conditions.
-When enabled, the feature should provide more consistent transmit
+When enabled, this feature should provide more consistent transmit
performance across queues and/or PFs and VFs.
.Pp
By default, transmit balancing is disabled in the NVM.
@@ -809,7 +846,7 @@ sysctl dev.ice.<interface #>.temp
may have a low number of network memory buffers (mbufs) by default.
If the number of mbufs available is too low, it may cause the driver to fail
to initialize and/or cause the system to become unresponsive.
-Check to see if the system is mbuf\-starved by running
+Check to see if the system is mbuf-starved by running
.Ic netstat Fl m .
Increase the number of mbufs by editing the lines below in
.Pa /etc/sysctl.conf :
@@ -821,8 +858,8 @@ kern.ipc.nmbjumbo16
kern.ipc.nmbufs
.Ed
.Pp
-The amount of memory that should be allocated is system specific, and may require some
-trial and error.
+The amount of memory that should be allocated is system specific,
+and may require some trial and error.
Also, increasing the following in
.Pa /etc/sysctl.conf
could help increase network performance:
@@ -847,13 +884,91 @@ To change the behavior of the QSFP28 ports on E810-C adapters, use the Intel
To update the firmware on an adapter, use the Intel
.Sy Non-Volatile Memory (NVM) Update Utility for Intel Ethernet Network Adapters E810 series - FreeBSD
.El
+.Ss Optics and auto-negotiation
+Modules based on 100GBASE-SR4,
+active optical cable (AOC), and active copper cable (ACC)
+do not support auto-negotiation per the IEEE specification.
+To obtain link with these modules,
+auto-negotiation must be turned off on the link partner's switch ports.
+.Pp
+Note that adapters also support
+all passive and active limiting direct attach cables
+that comply with SFF-8431 v4.1 and SFF-8472 v10.4 specifications.
+.Ss PCI-Express Slot Bandwidth
+Some PCIe x8 slots are actually configured as x4 slots.
+These slots have insufficient bandwidth
+for full line rate with dual port and quad port devices.
+In addition,
+if a PCIe v4.0 or v3.0-capable adapter is placed into into a PCIe v2.x
+slot, full bandwidth will not be possible.
+.Pp
+The driver detects this situation and
+writes the following message in the system log:
+.Bd -ragged -offset indent
+PCI-Express bandwidth available for this device
+may be insufficient for optimal performance.
+Please move the device to a different PCI-e link
+with more lanes and/or higher transfer rate.
+.Ed
+.Pp
+If this error occurs,
+moving the adapter to a true PCIe x8 or x16 slot will resolve the issue.
+For best performance, install devices in the following PCI slots:
+.Bl -bullet
+.It
+Any 100Gbps-capable Intel(R) Ethernet 800 Series device: Install in a
+PCIe v4.0 x8 or v3.0 x16 slot
+.It
+A 200Gbps-capable Intel(R) Ethernet 830 Series device: Install in a
+PCIe v5.0 x8 or v4.0 x16 slot
+.El
+.Pp
+For questions related to hardware requirements,
+refer to the documentation supplied with the adapter.
.Sh HARDWARE
The
.Nm
-driver supports the Intel Ethernet 800 series.
-Some adapters in this series with SFP28/QSFP28 cages
-have firmware that requires that Intel qualified modules are used; these
-qualified modules are listed below.
+driver supports the following
+Intel 800 series 1Gb to 200Gb Ethernet controllers:
+.Pp
+.Bl -bullet -compact
+.It
+Intel Ethernet Controller E810-C
+.It
+Intel Ethernet Controller E810-XXV
+.It
+Intel Ethernet Connection E822-C
+.It
+Intel Ethernet Connection E822-L
+.It
+Intel Ethernet Connection E823-C
+.It
+Intel Ethernet Connection E823-L
+.It
+Intel Ethernet Connection E825-C
+.It
+Intel Ethernet Connection E830-C
+.It
+Intel Ethernet Connection E830-CC
+.It
+Intel Ethernet Connection E830-L
+.It
+Intel Ethernet Connection E830-XXV
+.It
+Intel Ethernet Connection E835-C
+.It
+Intel Ethernet Connection E835-CC
+.It
+Intel Ethernet Connection E835-L
+.It
+Intel Ethernet Connection E835-XXV
+.El
+.Pp
+The
+.Nm
+driver supports some adapters in this series with SFP28/QSFP28 cages
+which have firmware that requires that Intel qualified modules are used;
+these qualified modules are listed below.
This qualification check cannot be disabled by the driver.
.Pp
The
@@ -862,13 +977,13 @@ driver supports 100Gb Ethernet adapters with these QSFP28 modules:
.Pp
.Bl -bullet -compact
.It
-Intel\(rg 100G QSFP28 100GBASE-SR4 E100GQSFPSR28SRX
+Intel 100G QSFP28 100GBASE-SR4 E100GQSFPSR28SRX
.It
-Intel\(rg 100G QSFP28 100GBASE-SR4 SPTMBP1PMCDF
+Intel 100G QSFP28 100GBASE-SR4 SPTMBP1PMCDF
.It
-Intel\(rg 100G QSFP28 100GBASE-CWDM4 SPTSBP3CLCCO
+Intel 100G QSFP28 100GBASE-CWDM4 SPTSBP3CLCCO
.It
-Intel\(rg 100G QSFP28 100GBASE-DR SPTSLP2SLCDF
+Intel 100G QSFP28 100GBASE-DR SPTSLP2SLCDF
.El
.Pp
The
@@ -877,11 +992,11 @@ driver supports 25Gb and 10Gb Ethernet adapters with these SFP28 modules:
.Pp
.Bl -bullet -compact
.It
-Intel\(rg 10G/25G SFP28 25GBASE-SR E25GSFP28SR
+Intel 10G/25G SFP28 25GBASE-SR E25GSFP28SR
.It
-Intel\(rg 25G SFP28 25GBASE-SR E25GSFP28SRX (Extended Temp)
+Intel 25G SFP28 25GBASE-SR E25GSFP28SRX (Extended Temp)
.It
-Intel\(rg 25G SFP28 25GBASE-LR E25GSFP28LRX (Extended Temp)
+Intel 25G SFP28 25GBASE-LR E25GSFP28LRX (Extended Temp)
.El
.Pp
The
@@ -890,54 +1005,15 @@ driver supports 10Gb and 1Gb Ethernet adapters with these SFP+ modules:
.Pp
.Bl -bullet -compact
.It
-Intel\(rg 1G/10G SFP+ 10GBASE-SR E10GSFPSR
+Intel 1G/10G SFP+ 10GBASE-SR E10GSFPSR
.It
-Intel\(rg 1G/10G SFP+ 10GBASE-SR E10GSFPSRG1P5
+Intel 1G/10G SFP+ 10GBASE-SR E10GSFPSRG1P5
.It
-Intel\(rg 1G/10G SFP+ 10GBASE-SR E10GSFPSRG2P5
+Intel 1G/10G SFP+ 10GBASE-SR E10GSFPSRG2P5
.It
-Intel\(rg 10G SFP+ 10GBASE-SR E10GSFPSRX (Extended Temp)
+Intel 10G SFP+ 10GBASE-SR E10GSFPSRX (Extended Temp)
.It
-Intel\(rg 1G/10G SFP+ 10GBASE-LR E10GSFPLR
-.El
-.Pp
-Note that adapters also support all passive and active
-limiting direct attach cables that comply with SFF-8431 v4.1 and
-SFF-8472 v10.4 specifications.
-.Pp
-This is not an exhaustive list; please consult product documentation for an
-up-to-date list of supported media.
-.Ss Fiber optics and auto\-negotiation
-Modules based on 100GBASE\-SR4, active optical cable (AOC), and active copper
-cable (ACC) do not support auto\-negotiation per the IEEE specification.
-To obtain link with these modules, auto\-negotiation must be turned off on the
-link partner's switch ports.
-.Ss PCI-Express Slot Bandwidth
-Some PCIe x8 slots are actually configured as x4 slots.
-These slots have insufficient bandwidth for full line rate with dual port and
-quad port devices.
-In addition, if a PCIe v4.0 or v3.0\-capable adapter is placed into a PCIe v2.x
-slot, full bandwidth will not be possible.
-.Pp
-The driver detects this situation and writes the following message in the
-system log:
-.Bd -literal -offset indent
-PCI\-Express bandwidth available for this device may be insufficient for
-optimal performance.
-Please move the device to a different PCI\-e link with more lanes and/or
-higher transfer rate.
-.Ed
-.Pp
-If this error occurs, moving the adapter to a true PCIe x8 or x16 slot will
-resolve the issue.
-For best performance, install devices in the following PCI slots:
-.Bl -bullet
-.It
-Any 100Gbps\-capable Intel(R) Ethernet 800 Series device: Install in a
-PCIe v4.0 x8 or v3.0 x16 slot
-.It
-A 200Gbps\-capable Intel(R) Ethernet 830 Series device: Install in a
-PCIe v5.0 x8 or v4.0 x16 slot
+Intel 1G/10G SFP+ 10GBASE-LR E10GSFPLR
.El
.Sh LOADER TUNABLES
Tunables can be set at the
@@ -1035,11 +1111,11 @@ on.
Disabled by default.
.It num-queues Pq uint16_t
Specify the number of queues the VF will have.
-By default, this is set to the number of MSI\-X vectors supported by the VF
+By default, this is set to the number of MSI-X vectors supported by the VF
minus one.
.It mirror-src-vsi Pq uint16_t
Specify which VSI the VF will mirror traffic from by setting this to a value
-other than \-1.
+other than -1.
All traffic from that VSI will be mirrored to this VF.
Can be used as an alternative method to mirror RDMA traffic to another
interface than the method described in the
diff --git a/share/man/man4/mpr.4 b/share/man/man4/mpr.4
index cce21113e5c2..8de46e4f9272 100644
--- a/share/man/man4/mpr.4
+++ b/share/man/man4/mpr.4
@@ -37,7 +37,7 @@
.\"
.\" $Id$
.\"
-.Dd June 1, 2019
+.Dd September 28, 2025
.Dt MPR 4
.Os
.Sh NAME
@@ -99,8 +99,12 @@ Broadcom Ltd./Avago Tech (LSI) SAS 3708 (8 Port SAS/PCIe)
.It
Broadcom Ltd./Avago Tech (LSI) SAS 3716 (16 Port SAS/PCIe)
.It
+Broadcom Ltd./Avago Tech (LSI) SAS 3808 (8 Port SAS/PCIe)
+.It
Broadcom Ltd./Avago Tech (LSI) SAS 3816 (16 Port SAS/PCIe)
.It
+Broadcom Ltd./Avago Tech (LSI) SAS 3908 (8 Port SAS/PCIe)
+.It
Broadcom Ltd./Avago Tech (LSI) SAS 3916 (16 Port SAS/PCIe)
.El
.Sh CONFIGURATION
diff --git a/share/man/man5/pf.conf.5 b/share/man/man5/pf.conf.5
index be46b1a47291..c22d983d33e8 100644
--- a/share/man/man5/pf.conf.5
+++ b/share/man/man5/pf.conf.5
@@ -27,7 +27,7 @@
.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd October 7, 2025
+.Dd November 3, 2025
.Dt PF.CONF 5
.Os
.Sh NAME
@@ -3460,6 +3460,12 @@ filteropt = user | group | flags | icmp-type | icmp6-type | "tos" tos |
"dnpipe" ( number | "(" number "," number ")" ) |
"dnqueue" ( number | "(" number "," number ")" ) |
"ridentifier" number |
+ "binat-to" ( redirhost | "{" redirhost-list "}" )
+ [ portspec ] [ pooltype ] |
+ "rdr-to" ( redirhost | "{" redirhost-list "}" )
+ [ portspec ] [ pooltype ] |
+ "nat-to" ( redirhost | "{" redirhost-list "}" )
+ [ portspec ] [ pooltype ] [ "static-port" ] |
[ ! ] "received-on" ( interface-name | interface-group )
nat-rule = [ "no" ] "nat" [ "pass" [ "log" [ "(" logopts ")" ] ] ]
diff --git a/share/man/man7/d.7 b/share/man/man7/d.7
index 4b00d3d71c79..59b3389b121b 100644
--- a/share/man/man7/d.7
+++ b/share/man/man7/d.7
@@ -198,6 +198,130 @@ The number of nanoseconds since the Epoch
Suitable for timestamping logs.
.El
.Sh BUILT-IN FUNCTIONS
+.\" Keep the indentation wide enough for the reader to be able to skim through
+.\" function names quickly.
+.Bl -tag -width "size_t strlen"
+.It Ft string Fn strchr "string s" "char c"
+Return a substring of
+.Fa s
+starting at the first occurance of
+.Fa c
+in
+.Fa s .
+Return
+.Dv NULL
+if
+.Fa c
+does not occur in
+.Fa s .
+.Pp
+For example,
+.Bd -literal -compact -offset indent
+strchr("abc", 'b');
+.Ed
+returns
+.Ql "bc"
+and
+.Bd -literal -compact -offset indent
+strchr("abc", 'd');
+.Ed
+returns
+.Dv NULL .
+.It Ft string Fn strjoin "string s1" "string s2"
+Return a string resulting from concatenating
+.Fa s1
+and
+.Fa s2 .
+.Pp
+For example,
+.Bd -literal -compact -offset indent
+strjoin("abc", "def")
+.Ed
+returns
+.Ql abcdef .
+.It Ft string Fn strrchr "string s" "char c"
+Return a substring of
+.Fa s
+starting at the last occurance of
+.Fa c
+in
+.Fa s .
+Similar to
+.Fn strchr .
+.It Ft string Fn strstr "string haystack" "string needle"
+Return a substring of
+.Fa haystack
+starting at the first occurrence of
+.Fa needle .
+Return
+.Dv NULL
+if
+.Fa needle
+is not a substring of
+.Fa haystack .
+.Pp
+For example,
+.Bd -literal -compact -offset indent
+strstr("abc1bc2", "bc")
+.Ed
+returns
+.Ql bc1bc2
+and
+.Bd -literal -compact -offset indent
+strstr("abc", "xy")
+.Ed
+returns
+.Dv NULL .
+.It Ft string Fn strtok "string s" "string separators"
+Tokenize
+.Fa s
+with
+.Fa separators .
+.Pp
+For example,
+.Bd -literal -compact -offset indent
+strtok("abcdefg", "xyzd")
+.Ed
+returns
+.Ql abc .
+.It Ft size_t Fn strlen "string s"
+Return the length of string
+.Fa s .
+.It Ft string Fn substr "string s" "int position" "[int length]"
+Return a
+substring of string
+.Fa s
+starting at
+.Fa position .
+The substring will be at most
+.Fa length Ns -long .
+If
+.Fa length
+is not specified, use the rest of the string.
+If
+.Fa position
+is greater than
+the size of
+.Fa s ,
+return an empty string.
+.Pp
+For example,
+.Bd -literal -compact -offset indent
+substr("abcd", 2)
+.Ed
+returns
+.Ql cd ,
+.Bd -literal -compact -offset indent
+substr("abcd", 2, 1)
+.Ed
+returns
+.Ql c ,
+and
+.Bd -literal -compact -offset indent
+substr("abcd", 99)
+.Ed
+returns an empty string.
+.El
.Ss Aggregation Functions
.Bl -tag -compact -width "llquantize(value, factor, low, high, nsteps)"
.It Fn avg value
diff --git a/share/man/man9/VFS.9 b/share/man/man9/VFS.9
index a1d0a19bec13..6ea6570bbf6e 100644
--- a/share/man/man9/VFS.9
+++ b/share/man/man9/VFS.9
@@ -26,7 +26,7 @@
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd February 9, 2010
+.Dd November 3, 2025
.Dt VFS 9
.Os
.Sh NAME
@@ -42,6 +42,7 @@ function from
rather than implementing empty functions or casting to
.Fa eopnotsupp .
.Sh SEE ALSO
+.Xr dtrace_vfs 4 ,
.Xr VFS_CHECKEXP 9 ,
.Xr VFS_FHTOVP 9 ,
.Xr VFS_MOUNT 9 ,
diff --git a/share/man/man9/atomic.9 b/share/man/man9/atomic.9
index c9133c6311a5..b027a0ff0bca 100644
--- a/share/man/man9/atomic.9
+++ b/share/man/man9/atomic.9
@@ -182,35 +182,42 @@ This variant is the default.
The second variant has acquire semantics, and the third variant has release
semantics.
.Pp
-When an atomic operation has acquire semantics, the operation must have
+An atomic operation can only have
+.Em acquire
+semantics if it performs a load
+from memory.
+When an atomic operation has acquire semantics, a load performed as
+part of the operation must have
completed before any subsequent load or store (by program order) is
performed.
Conversely, acquire semantics do not require that prior loads or stores have
-completed before the atomic operation is performed.
-An atomic operation can only have acquire semantics if it performs a load
-from memory.
+completed before a load from the atomic operation is performed.
To denote acquire semantics, the suffix
.Dq Li _acq
is inserted into the function name immediately prior to the
.Dq Li _ Ns Aq Fa type
suffix.
-For example, to subtract two integers ensuring that the subtraction is
+For example, to subtract two integers ensuring that the load of
+the value from memory is
completed before any subsequent loads and stores are performed, use
.Fn atomic_subtract_acq_int .
.Pp
+An atomic operation can only have
+.Em release
+semantics if it performs a store to memory.
When an atomic operation has release semantics, all prior loads or stores
-(by program order) must have completed before the operation is performed.
-Conversely, release semantics do not require that the atomic operation must
+(by program order) must have completed before a store executed as part of
+the operation that is performed.
+Conversely, release semantics do not require that a store from the atomic
+operation must
have completed before any subsequent load or store is performed.
-An atomic operation can only have release semantics if it performs a store
-to memory.
To denote release semantics, the suffix
.Dq Li _rel
is inserted into the function name immediately prior to the
.Dq Li _ Ns Aq Fa type
suffix.
For example, to add two long integers ensuring that all prior loads and
-stores are completed before the addition is performed, use
+stores are completed before the store of the result is performed, use
.Fn atomic_add_rel_long .
.Pp
When a release operation by one thread
@@ -235,6 +242,33 @@ section.
However, they will not prevent the compiler or processor from moving loads
or stores into the critical section, which does not violate the semantics of
a mutex.
+.Ss Architecture-dependent caveats for compare-and-swap
+The
+.Fn atomic_[f]cmpset_<type>
+operations, specifically those without explicitly specified memory
+ordering, are defined as relaxed.
+Consequently, a thread's accesses to memory locations different from
+that of the atomic operation can be reordered in relation to the
+atomic operation.
+.Pp
+However, the implementation on the
+.Sy amd64
+and
+.Sy i386
+architectures provide sequentially consistent semantics.
+In particular, the reordering mentioned above cannot occur.
+.Pp
+On the
+.Sy arm64/aarch64
+architecture, the operation may include either acquire
+semantics on the constituent load or release semantics
+on the constituent store.
+This means that accesses to other locations in program order
+before the atomic, might be observed as executed after the load
+that is the part of the atomic operation (but not after the store
+from the operation due to release).
+Similarly, accesses after the atomic might be observed as executed
+before the store.
.Ss Thread Fence Operations
Alternatively, a programmer can use atomic thread fence operations to
constrain the reordering of accesses.
diff --git a/share/man/man9/buf.9 b/share/man/man9/buf.9
index ecd4a1487735..ff9a1d0d46e0 100644
--- a/share/man/man9/buf.9
+++ b/share/man/man9/buf.9
@@ -36,44 +36,70 @@ The kernel implements a KVM abstraction of the buffer cache which allows it
to map potentially disparate vm_page's into contiguous KVM for use by
(mainly file system) devices and device I/O.
This abstraction supports
-block sizes from DEV_BSIZE (usually 512) to upwards of several pages or more.
+block sizes from
+.Dv DEV_BSIZE
+(usually 512) to upwards of several pages or more.
It also supports a relatively primitive byte-granular valid range and dirty
range currently hardcoded for use by NFS.
The code implementing the
VM Buffer abstraction is mostly concentrated in
-.Pa /usr/src/sys/kern/vfs_bio.c .
+.Pa sys/kern/vfs_bio.c
+in the
+.Fx
+source tree.
.Pp
One of the most important things to remember when dealing with buffer pointers
-(struct buf) is that the underlying pages are mapped directly from the buffer
+.Pq Vt struct buf
+is that the underlying pages are mapped directly from the buffer
cache.
No data copying occurs in the scheme proper, though some file systems
such as UFS do have to copy a little when dealing with file fragments.
The second most important thing to remember is that due to the underlying page
-mapping, the b_data base pointer in a buf is always *page* aligned, not
-*block* aligned.
-When you have a VM buffer representing some b_offset and
-b_size, the actual start of the buffer is (b_data + (b_offset & PAGE_MASK))
-and not just b_data.
+mapping, the
+.Va b_data
+base pointer in a buf is always
+.Em page Ns -aligned ,
+not
+.Em block Ns -aligned .
+When you have a VM buffer representing some
+.Va b_offset
+and
+.Va b_size ,
+the actual start of the buffer is
+.Ql b_data + (b_offset & PAGE_MASK)
+and not just
+.Ql b_data .
Finally, the VM system's core buffer cache supports
-valid and dirty bits (m->valid, m->dirty) for pages in DEV_BSIZE chunks.
+valid and dirty bits
+.Pq Va m->valid , m->dirty
+for pages in
+.Dv DEV_BSIZE
+chunks.
Thus
a platform with a hardware page size of 4096 bytes has 8 valid and 8 dirty
bits.
These bits are generally set and cleared in groups based on the device
block size of the device backing the page.
Complete page's worth are often
-referred to using the VM_PAGE_BITS_ALL bitmask (i.e., 0xFF if the hardware page
+referred to using the
+.Dv VM_PAGE_BITS_ALL
+bitmask (i.e., 0xFF if the hardware page
size is 4096).
.Pp
VM buffers also keep track of a byte-granular dirty range and valid range.
This feature is normally only used by the NFS subsystem.
I am not sure why it
-is used at all, actually, since we have DEV_BSIZE valid/dirty granularity
+is used at all, actually, since we have
+.Dv DEV_BSIZE
+valid/dirty granularity
within the VM buffer.
-If a buffer dirty operation creates a 'hole',
+If a buffer dirty operation creates a
+.Dq hole ,
the dirty range will extend to cover the hole.
If a buffer validation
-operation creates a 'hole' the byte-granular valid range is left alone and
+operation creates a
+.Dq hole
+the byte-granular valid range is left alone and
will not take into account the new extension.
Thus the whole byte-granular
abstraction is considered a bad hack and it would be nice if we could get rid
@@ -81,16 +107,24 @@ of it completely.
.Pp
A VM buffer is capable of mapping the underlying VM cache pages into KVM in
order to allow the kernel to directly manipulate the data associated with
-the (vnode,b_offset,b_size).
+the
+.Pq Va vnode , b_offset , b_size .
The kernel typically unmaps VM buffers the moment
-they are no longer needed but often keeps the 'struct buf' structure
-instantiated and even bp->b_pages array instantiated despite having unmapped
+they are no longer needed but often keeps the
+.Vt struct buf
+structure
+instantiated and even
+.Va bp->b_pages
+array instantiated despite having unmapped
them from KVM.
If a page making up a VM buffer is about to undergo I/O, the
-system typically unmaps it from KVM and replaces the page in the b_pages[]
+system typically unmaps it from KVM and replaces the page in the
+.Va b_pages[]
array with a place-marker called bogus_page.
The place-marker forces any kernel
-subsystems referencing the associated struct buf to re-lookup the associated
+subsystems referencing the associated
+.Vt struct buf
+to re-lookup the associated
page.
I believe the place-marker hack is used to allow sophisticated devices
such as file system devices to remap underlying pages in order to deal with,
@@ -107,18 +141,29 @@ you wind up with pages marked clean that are actually still dirty.
If not
treated carefully, these pages could be thrown away!
Indeed, a number of
-serious bugs related to this hack were not fixed until the 2.2.8/3.0 release.
-The kernel uses an instantiated VM buffer (i.e., struct buf) to place-mark pages
+serious bugs related to this hack were not fixed until the
+.Fx 2.2.8 /
+.Fx 3.0
+release.
+The kernel uses an instantiated VM buffer (i.e.,
+.Vt struct buf )
+to place-mark pages
in this special state.
-The buffer is typically flagged B_DELWRI.
+The buffer is typically flagged
+.Dv B_DELWRI .
When a
-device no longer needs a buffer it typically flags it as B_RELBUF.
+device no longer needs a buffer it typically flags it as
+.Dv B_RELBUF .
Due to
-the underlying pages being marked clean, the B_DELWRI|B_RELBUF combination must
+the underlying pages being marked clean, the
+.Ql B_DELWRI|B_RELBUF
+combination must
be interpreted to mean that the buffer is still actually dirty and must be
written to its backing store before it can actually be released.
In the case
-where B_DELWRI is not set, the underlying dirty pages are still properly
+where
+.Dv B_DELWRI
+is not set, the underlying dirty pages are still properly
marked as dirty and the buffer can be completely freed without losing that
clean/dirty state information.
(XXX do we have to check other flags in
@@ -128,7 +173,9 @@ The kernel reserves a portion of its KVM space to hold VM Buffer's data
maps.
Even though this is virtual space (since the buffers are mapped
from the buffer cache), we cannot make it arbitrarily large because
-instantiated VM Buffers (struct buf's) prevent their underlying pages in the
+instantiated VM Buffers
+.Pq Vt struct buf Ap s
+prevent their underlying pages in the
buffer cache from being freed.
This can complicate the life of the paging
system.
diff --git a/share/man/man9/callout.9 b/share/man/man9/callout.9
index 0e59ef8ab2b1..637049ec1ef5 100644
--- a/share/man/man9/callout.9
+++ b/share/man/man9/callout.9
@@ -27,7 +27,7 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd January 22, 2024
+.Dd November 4, 2025
.Dt CALLOUT 9
.Os
.Sh NAME
@@ -789,6 +789,8 @@ and
functions return a value of one if the callout was still pending when it was
called, a zero if the callout could not be stopped and a negative one is it
was either not running or has already completed.
+.Sh SEE ALSO
+.Xr dtrace_callout_execute 4
.Sh HISTORY
.Fx
initially used the long standing
diff --git a/share/man/man9/make_dev.9 b/share/man/man9/make_dev.9
index de56f350faa5..9f2c36fb39a4 100644
--- a/share/man/man9/make_dev.9
+++ b/share/man/man9/make_dev.9
@@ -25,7 +25,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.Dd January 19, 2025
+.Dd November 4, 2025
.Dt MAKE_DEV 9
.Os
.Sh NAME
@@ -387,14 +387,18 @@ function is the same as:
destroy_dev_sched_cb(cdev, NULL, NULL);
.Ed
.Pp
-The
+Neither the
.Fn d_close
-driver method cannot call
+driver method, nor a
+.Xr devfs_cdevpriv 9
+.Fa dtr
+method can
.Fn destroy_dev
directly.
Doing so causes deadlock when
.Fn destroy_dev
-waits for all threads to leave the driver methods.
+waits for all threads to leave the driver methods and finish executing any
+per-open destructors.
Also, because
.Fn destroy_dev
sleeps, no non-sleepable locks may be held over the call.
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-06 22:19:34 +0000