src-test/sys/dev/isci, branch main

Make MAXPHYS tunable. Bump MAXPHYS to 1M.

2020-11-28T12:12:51Z

Replace MAXPHYS by runtime variable maxphys. It is initialized from MAXPHYS by default, but can be also adjusted with the tunable kern.maxphys. Make b_pages[] array in struct buf flexible. Size b_pages[] for buffer cache buffers exactly to atop(maxbcachebuf) (currently it is sized to atop(MAXPHYS)), and b_pages[] for pbufs is sized to atop(maxphys) + 1. The +1 for pbufs allow several pbuf consumers, among them vmapbuf(), to use unaligned buffers still sized to maxphys, esp. when such buffers come from userspace (*). Overall, we save significant amount of otherwise wasted memory in b_pages[] for buffer cache buffers, while bumping MAXPHYS to desired high value. Eliminate all direct uses of the MAXPHYS constant in kernel and driver sources, except a place which initialize maxphys. Some random (and arguably weird) uses of MAXPHYS, e.g. in linuxolator, are converted straight. Some drivers, which use MAXPHYS to size embeded structures, get private MAXPHYS-like constant; their convertion is out of scope for this work. Changes to cam/, dev/ahci, dev/ata, dev/mpr, dev/mpt, dev/mvs, dev/siis, where either submitted by, or based on changes by mav. Suggested by: mav (*) Reviewed by: imp, mav, imp, mckusick, scottl (intermediate versions) Tested by: pho Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D27225

Remove support for FreeBSD 8 systems. These workarounds and ways of rescanning

2020-03-01T17:27:35Z

devices are no longer done.

Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)

2020-02-26T14:26:36Z

r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are still not MPSAFE (or already are but aren’t properly marked). Use it in preparation for a general review of all nodes. This is non-functional change that adds annotations to SYSCTL_NODE and SYSCTL_PROC nodes using one of the soon-to-be-required flags. Mark all obvious cases as MPSAFE. All entries that haven't been marked as MPSAFE before are by default marked as NEEDGIANT Approved by: kib (mentor, blanket) Commented by: kib, gallatin, melifaro Differential Revision: https://reviews.freebsd.org/D23718

Enforce a 4GB DMA boundary on isci(4)

2019-07-10T22:23:59Z

This device cannot cross a 4GB boundary with DMA. Removing the boundary in r346386 resulted in low frequency memory corruption on machines with isci(4) controllers. Submitted by: gallatin@ Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D20910

isci(4): Use controller->lock for busdma tags.

2019-03-12T16:49:08Z

isci(4) uses deferred loading. Typically on amd64 and i386 non-PAE the tag does not create any restrictions, but on i386 PAE-tables but non-PAE configs callbacks might be used. Reported and tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 2 weeks

Correct typo in ATA_WRITE_UNCORRECTABLE_PSEUDO

2018-02-23T20:01:42Z

Also correct a typo in the comment for these values, noted by jimharris. Reviewed by: jimharris Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D3715

kernel: Fix several typos and minor errors

2017-12-27T03:23:21Z

- duplicate words - typos - references to old versions of FreeBSD Reviewed by: imp, benno

sys/dev: further adoption of SPDX licensing ID tags.

2017-11-27T14:52:40Z

Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.

Include opt files in the kernel with "" instead of <>.

2017-07-10T05:08:01Z

scif_sas_controller: Fix inverted logic range check

2017-03-13T17:58:08Z

PR: 217742 Submitted by: Svyatoslav Sponsored by: Viva64 (PVS-Studio)