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Correct the description of MADV_DONTNEED. Specifically, after using

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MADV_DONTNEED, while pages faults on the affected address range are more
likely to occur, they are not guaranteed to occur.

MFC after:	3 days
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alc 2015-07-12 19:18:19 +00:00
parent eb8d3d79be
commit c97201a229
1 changed files with 4 additions and 4 deletions
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8
lib/libc/sys/madvise.2
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@ -28,7 +28,7 @@
.\" @(#)madvise.2 8.1 (Berkeley) 6/9/93 .\" @(#)madvise.2 8.1 (Berkeley) 6/9/93
.\" $FreeBSD$ .\" $FreeBSD$
.\" .\"
.Dd January 30, 2014 .Dd July 12, 2015
.Dt MADVISE 2 .Dt MADVISE 2
.Os .Os
.Sh NAME .Sh NAME
@ -79,9 +79,9 @@ pages in from backing store, but quickly map the pages already in memory
into the calling process. into the calling process.
.It Dv MADV_DONTNEED .It Dv MADV_DONTNEED
Allows the VM system to decrease the in-memory priority Allows the VM system to decrease the in-memory priority
of pages in the specified range. of pages in the specified address range.
Additionally future references to Consequently, future references to this address range are more likely
this address range will incur a page fault. to incur a page fault.
.It Dv MADV_FREE .It Dv MADV_FREE
Gives the VM system the freedom to free pages, Gives the VM system the freedom to free pages,
and tells the system that information in the specified page range and tells the system that information in the specified page range