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authorRuslan Ermilov <ru@FreeBSD.org>2001-08-20 08:55:07 +0000
committerRuslan Ermilov <ru@FreeBSD.org>2001-08-20 08:55:07 +0000
commit3faf1df3a7e3cc265b6c7ae38e8b183a5bcc59ef (patch)
treeb7c77a17eca551068643c25efbfa8b8419854be9
parentd7c5f0519977a40314680aeb8ab546a98b0aa559 (diff)
Notes
-rw-r--r--sys/boot/common/loader.826
1 files changed, 17 insertions, 9 deletions
diff --git a/sys/boot/common/loader.8 b/sys/boot/common/loader.8
index 2ee850b0d461..fed7225e9e58 100644
--- a/sys/boot/common/loader.8
+++ b/sys/boot/common/loader.8
@@ -414,28 +414,36 @@ Limits the amount of KVM to be used to hold swap
meta information, which directly governs the
maximum amount of swap the system can support.
This value is specified in bytes of KVA space
-and defaults to around 70MBytes. Care should be taken
+and defaults to around 70MBytes.
+Care should be taken
to not reduce this value such that the actual
amount of configured swap exceeds 1/2 the
-kernel-supported swap. The default 70MB allows
+kernel-supported swap.
+The default 70MB allows
the kernel to support a maximum of (approximately)
-14GB of configured swap. Only mess around with
+14GB of configured swap.
+Only mess around with
this parameter if you need to greatly extend the
KVM reservation for other resources such as the
-buffer cache or NMBCLUSTERS. Modifies
-.Va VM_SWZONE_SIZE_MAX
+buffer cache or
+.Va NMBCLUSTERS .
+Modifies
+.Va VM_SWZONE_SIZE_MAX .
.It Va kern.maxbcache
Limits the amount of KVM reserved for use by the
-buffer cache, specified in bytes. The default
-maximum is 200MB. This parameter is used to
+buffer cache, specified in bytes.
+The default maximum is 200MB.
+This parameter is used to
prevent the buffer cache from eating to much
KVM in large-memory machine configurations.
Only mess around with this parameter if you need to
greatly extend the KVM reservation for other resources
-such as the swap zone or NMBCLUSTERS. Note that
+such as the swap zone or
+.Va NMBCLUSTERS .
+Note that
the NBUF parameter will override this limit.
Modifies
-.Va VM_BCACHE_SIZE_MAX
+.Va VM_BCACHE_SIZE_MAX .
.It Va machdep.pccard.pcic_irq
Overrides the IRQ normally assigned to a PCCARD controller.
Typically the first available interrupt will be allocated,