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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Sat, 17 Mar 2012 23:55:18 +0000 (UTC)
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Subject: svn commit: r233102 - head/lib/libc/sys
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Author: kib
Date: Sat Mar 17 23:55:18 2012
New Revision: 233102
URL: http://svn.freebsd.org/changeset/base/233102

Log:
  Do not claim that msync(2) is obsoleted [1].
  Document EIO from msync(2).
  
  Inspired by PR:	 docs/165929 [1]
  Reviewed by:	 jilles
  MFC after:	 2 weeks

Modified:
  head/lib/libc/sys/mmap.2
  head/lib/libc/sys/msync.2

Modified: head/lib/libc/sys/mmap.2
==============================================================================
--- head/lib/libc/sys/mmap.2	Sat Mar 17 23:03:20 2012	(r233101)
+++ head/lib/libc/sys/mmap.2	Sat Mar 17 23:55:18 2012	(r233102)
@@ -28,7 +28,7 @@
 .\"	@(#)mmap.2	8.4 (Berkeley) 5/11/95
 .\" $FreeBSD$
 .\"
-.Dd August 28, 2010
+.Dd March 18, 2012
 .Dt MMAP 2
 .Os
 .Sh NAME
@@ -205,7 +205,7 @@ command and
 system call generally do not flush dirty NOSYNC VM data.
 The
 .Xr msync 2
-system call is obsolete since
+system call is usually not needed since
 .Bx
 implements a coherent file system buffer cache.
 However, it may be

Modified: head/lib/libc/sys/msync.2
==============================================================================
--- head/lib/libc/sys/msync.2	Sat Mar 17 23:03:20 2012	(r233101)
+++ head/lib/libc/sys/msync.2	Sat Mar 17 23:55:18 2012	(r233102)
@@ -28,7 +28,7 @@
 .\"	@(#)msync.2	8.2 (Berkeley) 6/21/94
 .\" $FreeBSD$
 .\"
-.Dd June 21, 1994
+.Dd March 18, 2012
 .Dt MSYNC 2
 .Os
 .Sh NAME
@@ -98,6 +98,9 @@ The
 argument
 was both MS_ASYNC and MS_INVALIDATE.
 Only one of these flags is allowed.
+.It Bq Er EIO
+ An error occurred while writing at least one of the pages in
+the specified region.
 .El
 .Sh SEE ALSO
 .Xr madvise 2 ,
@@ -113,7 +116,7 @@ system call first appeared in
 .Sh BUGS
 The
 .Fn msync
-system call is obsolete since
+system call is usually not needed since
 .Bx
 implements a coherent file system buffer cache.
 However, it may be used to associate dirty VM pages with file system