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mlock.2: Minor tweaks to Eric Munson's patch 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2015-12-14 22:19:36 +01:00
parent a0c1a1ef95
commit d357d179c9
1 changed files with 17 additions and 11 deletions
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28
man2/mlock.2
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@ -65,6 +65,9 @@ guaranteed to be resident in RAM when the call returns successfully;
the pages are guaranteed to stay in RAM until later unlocked.
.BR mlock2 ()
.\" commit a8ca5d0ecbdde5cc3d7accacbd69968b0c98764e
.\" commit de60f5f10c58d4f34b68622442c0e04180367f3f
.\" commit b0f205c2a3082dd9081f9a94e50658c5fa906ff1
also locks pages in the specified range starting at
.I addr
and continuing for
@ -78,7 +81,7 @@ argument.
The
.I flags
argument can be either 0 or the following constant:
.TP 1.2i
.TP
.B MLOCK_ONFAULT
Lock pages that are currently resident and mark the entire range to have
pages locked when they are populated by the page fault.
@ -88,14 +91,13 @@ If
.I flags
is 0,
.BR mlock2 ()
will function exactly as
.BR mlock ()
would.
behaves exactly the same as
.BR mlock ().
Note: Currently, there is not a glibc wrapper for
.BR mlock2 ()
Note: currently, there is not a glibc wrapper for
.BR mlock2 (),
so it will need to be invoked using
.BR syscall (2)
.BR syscall (2).
.BR munlock ()
unlocks pages in the address range starting at
@ -266,6 +268,9 @@ For
.B EPERM
(Linux 2.6.8 and earlier) The caller was not privileged
.RB ( CAP_IPC_LOCK ).
.SH VERSIONS
.BR mlock2 (2)
is available since Linux 4.4.
.SH CONFORMING TO
POSIX.1-2001, POSIX.1-2008, SVr4.
.SH AVAILABILITY
@ -375,7 +380,11 @@ and
automatically round
.I addr
down to the nearest page boundary.
However, POSIX.1 allows an implementation to require that
However, the POSIX.1 specification of
.BR mlock ()
and
.BR munlock ()
allows an implementation to require that
.I addr
is page aligned, so portable applications should ensure this.
@ -430,9 +439,6 @@ resource limit is encountered.
.\" http://marc.theaimsgroup.com/?l=linux-kernel&m=113801392825023&w=2
.\" "Rationale for RLIMIT_MEMLOCK"
.\" 23 Jan 2006
.SH VERSIONS
.BR mlock2 (2)
is available since Linux 4.4.
.SH SEE ALSO
.BR mmap (2),
.BR setrlimit (2),