http://oss.sgi.com/bugzilla/show_bug.cgi?id=489
Summary: xfs_db "frag" command segfaulted after xfs_fsr
defragmentation run
Product: Linux XFS
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: xfsprogs
AssignedTo: xfs-master@xxxxxxxxxxx
ReportedBy: Martin@xxxxxxxxxxxx
Hello,
today I finally tried out XFS online defragmentation feature using Debian
Linux Etch/Sid with a self compiled Linux kernel 2.6.15.4 on my IBM ThinkPad
T23, P3 1.13GHz, 384 MB RAM.
First I checked whether defragmentation would give benefits.
root@deepdance:~ -> xfs_db -r /dev/hda5
xfs_db> frag
actual 302397, ideal 299802, fragmentation factor 0.86%
xfs_db> quit
root@deepdance:~ -> xfs_db -r /dev/hda8
xfs_db> frag
actual 324428, ideal 303369, fragmentation factor 6.49%
xfs_db> quit
This worked okay. I decided to give xfs_fsr a spin on /dev/hda8, which
contains my /home filesystem:
root@deepdance:~ -> xfs_fsr /dev/hda8
/home start inode=0
After about half an hour it was finished. I wanted to check what the results
where, so I tried the frag command again, but it segfaulted:
root@deepdance:~ -> xfs_db -r /dev/hda8
xfs_db> frag
Speicherzugriffsfehler (means segmentation fault in german)
root@deepdance:~ -> xfs_db -r /dev/hda8
xfs_db> frag
Speicherzugriffsfehler
I felt a bit uneasy about it, thus I rebooted the machine into a parallel
OpenSUSE installation and ran xfs_check /dev/hda8. The filesystem was intact
*PHEW* ;-)
I rebooted and got an unrelated crash on kcminit (KDE control center init
program) due to an ALSA failure (/etc/init.d/alsa-utils restart made alsactrl
crash). I reinstalled the package alsa-utils, but it didnt help, so I
rebooted.
When I fully rebooted the second time, the "frag" command worked okay:
root@deepdance:/mnt -> xfs_db -r /dev/hda8
xfs_db> frag
actual 306343, ideal 303370, fragmentation factor 0.97%
So it seems despite a running KDE during defragmenting the defragmentation
process was quite successful.
I am not sure whether that segfault on xfs_db "frag" command after xfs_fsr is
reproducable. I should try whether its possible to reproduce that bug, but I
want to do some other stuff after reporting this to you.
Tell me when you need any more info. I didn't find the version of the XFS
filesystem in the kernel I use by looking at the source or in /proc/fs/xfs,
but I guess you know it better than me. It should be fairly recent ;-).
I have the following version of xfs stuff installed:
martin@deepdance:~ -> dpkg -l | grep xfs
[ ... ]
ii xfsdump 2.2.30-1 Administrative utilities
for the XFS filesystem
ii xfsprogs 2.7.7-1 Utilities for managing the
XFS filesystem
Regards,
Martin Steigerwald
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