Date: Wed, 29 Sep 2010 14:36:26 +0000 (UTC) From: Jaakko Heinonen <jh@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r213273 - stable/8/share/man/man9 Message-ID: <201009291436.o8TEaQx2012617@svn.freebsd.org>
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Author: jh Date: Wed Sep 29 14:36:25 2010 New Revision: 213273 URL: http://svn.freebsd.org/changeset/base/213273 Log: MFC r209168: Update vfs_busy(9) and vfs_unbusy(9) manual pages to better match the current behaviour of the functions. Modified: stable/8/share/man/man9/vfs_busy.9 stable/8/share/man/man9/vfs_unbusy.9 Directory Properties: stable/8/share/man/man9/ (props changed) Modified: stable/8/share/man/man9/vfs_busy.9 ============================================================================== --- stable/8/share/man/man9/vfs_busy.9 Wed Sep 29 14:22:00 2010 (r213272) +++ stable/8/share/man/man9/vfs_busy.9 Wed Sep 29 14:36:25 2010 (r213273) @@ -26,7 +26,7 @@ .\" .\" $FreeBSD$ .\" -.Dd November 2, 2008 +.Dd June 14, 2010 .Dt VFS_BUSY 9 .Os .Sh NAME @@ -40,9 +40,8 @@ .Sh DESCRIPTION The .Fn vfs_busy -function marks a mount point as busy. -The purpose of this -function is to synchronize access to a mount point. +function marks a mount point as busy by incrementing +the reference count of a mount point. It also delays unmounting by sleeping on .Fa mp if the @@ -50,7 +49,7 @@ if the flag is set in .Fa mp->mnt_kern_flag and the -.Dv LK_NOWAIT +.Dv MBF_NOWAIT flag is .Em not set. @@ -75,9 +74,9 @@ drop the mountlist_mtx in the critical p .Sh RETURN VALUES A 0 value is returned on success. If the mount point is being -unmounted +unmounted and MBF_NOWAIT flag is specified .Er ENOENT -will always be returned. +will be returned. .Sh ERRORS .Bl -tag -width Er .It Bq Er ENOENT Modified: stable/8/share/man/man9/vfs_unbusy.9 ============================================================================== --- stable/8/share/man/man9/vfs_unbusy.9 Wed Sep 29 14:22:00 2010 (r213272) +++ stable/8/share/man/man9/vfs_unbusy.9 Wed Sep 29 14:36:25 2010 (r213273) @@ -26,7 +26,7 @@ .\" .\" $FreeBSD$ .\" -.Dd August 29, 2008 +.Dd June 14, 2010 .Dt VFS_UNBUSY 9 .Os .Sh NAME @@ -40,23 +40,17 @@ .Sh DESCRIPTION The .Fn vfs_unbusy -function un-busies a mount point by unlocking -.Fa mp->mnt_lock . -The lock is typically acquired by calling +function un-busies a mount point by decrementing +the reference count of a mount point. +The reference count is typically incremented by calling .Xr vfs_busy 9 prior to this call. .Pp Its arguments are: .Bl -tag -width ".Fa mp" .It Fa mp -The mount point to unbusy (unlock). +The mount point to unbusy. .El -.Sh LOCKS -.Va mnt_lock -must be locked in -.Fa mp -prior to calling -this function, and it will be unlocked upon return. .Sh SEE ALSO .Xr vfs_busy 9 .Sh AUTHORS
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