Date: Fri, 25 Sep 2009 08:58:21 GMT From: Peter Holm <pho@FreeBSD.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/139127: False negative vfs cache entry Message-ID: <200909250858.n8P8wLgr012110@www.freebsd.org> Resent-Message-ID: <200909250900.n8P90BoS051789@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 139127
>Category: kern
>Synopsis: False negative vfs cache entry
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Sep 25 09:00:10 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator: Peter Holm
>Release: Current
>Organization:
The FreeBSD Project
>Environment:
FreeBSD x4.osted.lan 9.0-CURRENT FreeBSD 9.0-CURRENT #0 r197453: Thu Sep 24 12:52:32 CEST 2009 pho@x4.osted.lan:/usr/src/sys/i386/compile/PHO i386
>Description:
$ ls -l /tmp/file.05015?
ls: /tmp/file.050150: No such file or directory
$ fsdb -r /dev/ad4s1e
** /dev/ad4s1e (NO WRITE)
Examining file system `/dev/ad4s1e'
Last Mounted on /tmp
current inode: directory
I=2 MODE=41777 SIZE=5120
BTIME=May 7 05:54:47 2006 [0 nsec]
MTIME=Apr 2 11:27:36 2009 [0 nsec]
CTIME=Apr 2 11:27:36 2009 [0 nsec]
ATIME=Apr 2 12:00:30 2009 [0 nsec]
OWNER=root GRP=wheel LINKCNT=35 FLAGS=0 BLKCNT=c GEN=65f71df4
fsdb (inum: 2)> lookup file.050150
component `file.050150': current inode: regular file
I=198 MODE=100600 SIZE=0
BTIME=Apr 2 11:24:33 2009 [0 nsec]
MTIME=Apr 2 11:24:33 2009 [0 nsec]
CTIME=Apr 2 11:24:33 2009 [0 nsec]
ATIME=Apr 2 11:24:33 2009 [0 nsec]
OWNER=pho GRP=wheel LINKCNT=1 FLAGS=0 BLKCNT=0 GEN=1deaab3a
fsdb (inum: 198)> quit
$
Consistency is restored by a umount + mount of the FS
>How-To-Repeat:
Test scenario at http://svn.freebsd.org/base/projects/stress2/misc/namecache.sh has to be run a few times to get the problem.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200909250858.n8P8wLgr012110>