Package: xfsprogs
Version: 2.9.8-1lenny1
Severity: important
After a crash I ran an xfs_repair on a filesystem. xfs_repair did a lot of
I/O etc. as one would expect, but after a while:
Phase 1 - find and verify superblock...
Phase 2 - using internal log
- zero log...
- scan filesystem freespace and inode maps...
- found root inode chunk
Phase 3 - for each AG...
- scan and clear agi unlinked lists...
- process known inodes and perform inode discovery...
- agno = 0
- agno = 1
- agno = 2
- agno = 3
- process newly discovered inodes...
Phase 4 - check for duplicate blocks...
- setting up duplicate extent list...
- check for inodes claiming duplicate blocks...
- agno = 0
- agno = 1
- agno = 2
- agno = 3
Phase 5 - rebuild AG headers and trees...
- reset superblock...
Phase 6 - check inode connectivity...
- resetting contents of realtime bitmap and summary inodes
- traversing filesystem ...
it stopped doing any I/O and only sat there, using 170-180% cpu (top, dual-core
system).
An strace doesn't show xfs_repair doing anything except mutex operations:
http://ue.tst.eu/37906f67a8a9d081cc55a4dc6a672471.txt
After 10 minutes, I interrupted xfs_repair and ran it again, with taskset
1, which this time ran through (which does not mean much). It also spent
a long time during the "traversing filesystem" phase, much longer than it
took the first run to stop working, so my guess is that something in that
phase can cause a livelock.
I should also note that xfs_repair usually finishes within <20 seconds on
all the filesystems on the box, but it takes a very very long time (20
minutes, doing lots of I/O) on this filesystem, although the filesystems
should have similar content.
-- System Information:
Debian Release: 5.0
APT prefers stable
APT policy: (990, 'stable'), (500, 'unstable'), (500, 'testing'), (1,
'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.26-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=C, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages xfsprogs depends on:
hi libc6 2.7-18 GNU C Library: Shared libraries
ii libreadline5 5.2-3.1 GNU readline and history libraries
ii libuuid1 1.41.3-1 universally unique id library
xfsprogs recommends no packages.
Versions of packages xfsprogs suggests:
ii attr 1:2.4.43-2 Utilities for manipulating filesys
pn dvhtool <none> (no description available)
ii quota 3.16-7 implementation of the disk quota s
ii xfsdump 2.2.48-1 Administrative utilities for the X
-- no debconf information
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