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| author | bjk <bjk@FreeBSD.org> | 2014-05-17 03:05:52 +0000 |
|---|---|---|
| committer | bjk <bjk@FreeBSD.org> | 2014-05-17 03:05:52 +0000 |
| commit | 77baea613b30871ef17f139c5ebb092cc7a08242 (patch) | |
| tree | a4031efebb6ae5d280ea2930b1d14538ec5c3301 /lib/libc | |
| parent | 8c872c3b5e3801fd208422b8ba94f20d8651cd2c (diff) | |
| download | FreeBSD-src-77baea613b30871ef17f139c5ebb092cc7a08242.zip FreeBSD-src-77baea613b30871ef17f139c5ebb092cc7a08242.tar.gz | |
Correct documentation of the limit on how much memory can be mlock()ed
vm.max_wired is a system-wide limit, not per-process. Reword the
section to make this more clear.
PR: docs/189214
Submitted by: Lawrence Chen (original text)
Approved by: hrs (mentor)
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/sys/mlock.2 | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/lib/libc/sys/mlock.2 b/lib/libc/sys/mlock.2 index 42acc97..5c914f4 100644 --- a/lib/libc/sys/mlock.2 +++ b/lib/libc/sys/mlock.2 @@ -28,7 +28,7 @@ .\" @(#)mlock.2 8.2 (Berkeley) 12/11/93 .\" $FreeBSD$ .\" -.Dd March 18, 2013 +.Dd May 17, 2014 .Dt MLOCK 2 .Os .Sh NAME @@ -91,14 +91,21 @@ Locked mappings are not inherited by the child process after a .Pp Since physical memory is a potentially scarce resource, processes are limited in how much they can lock down. -A single process can +The amount of memory that a single process can .Fn mlock -the minimum of -a system-wide ``wired pages'' limit -.Va vm.max_wired -and the per-process +is limited by both the per-process .Li RLIMIT_MEMLOCK -resource limit. +resource limit and the +system-wide +.Dq wired pages +limit +.Va vm.max_wired . +.Va vm.max_wired +applies to the system as a whole, so the amount available to a single +process at any given time is the difference between +.Va vm.max_wired +and +.Va vm.stats.vm.v_wire_count . .Pp If .Va security.bsd.unprivileged_mlock |
