„Too many iterations“ and fsck.reiser4 failure

[Andrej Podzimek <andrej@podzimek.org>]

Hello,

my laptop system has been in use with Reiser v4 for half a year or so. There
may have been some unexpected restarts and system crashes during that
time... KDE refused to start today. This time it was not just a usual
problem with user permissions. This is what I found in kernel.log:

Jun  9 12:23:38 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:38 xandrej WARNING: Too many iterations: 128
Jun  9 12:23:38 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:38 xandrej WARNING: Too many iterations: 256
Jun  9 12:23:38 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:38 xandrej WARNING: Too many iterations: 512
Jun  9 12:23:38 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:38 xandrej WARNING: Too many iterations: 1024
Jun  9 12:23:38 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:38 xandrej WARNING: Too many iterations: 2048
Jun  9 12:23:38 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:38 xandrej WARNING: Too many iterations: 4096
Jun  9 12:23:38 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:38 xandrej WARNING: Too many iterations: 8192
Jun  9 12:23:38 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:38 xandrej WARNING: Too many iterations: 16384
Jun  9 12:23:38 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:38 xandrej WARNING: Too many iterations: 32768
Jun  9 12:23:38 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:38 xandrej WARNING: Too many iterations: 65536
Jun  9 12:23:39 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:39 xandrej WARNING: Too many iterations: 131072
Jun  9 12:23:39 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:689)[nikita-1481]:
Jun  9 12:23:39 xandrej WARNING: Too many iterations: 262144
Jun  9 12:23:40 xandrej reiser4[kbuildsycoca(3104)]: traverse_tree
(fs/reiser4/search.c:722)[nikita-373]:
Jun  9 12:23:40 xandrej WARNING: reiser-2018: Too many iterations. Tree
corrupted, or (less likely) starvation occurring.: level: 4, lock_level: 2,
stop_level: 1 lock_mode: read, bias: left-slant
Jun  9 12:23:40 xandrej reiser4[kbuildsycoca(3104)]: tail2extent
(fs/reiser4/plugin/file/tail_conversion.c:516)[nikita-2282]:
Jun  9 12:23:40 xandrej WARNING: Partial conversion of 2426179: -5

Running fsck.reiser4 revealed corruption on all of my Reiser4 volumes. All
of them could be fixed, except for /home. :-( I ran fsck.reiser4 --build-fs
--build-sb. Everything went just fine until the sematic tree scan. It got
stuck at 99% with intensive disk usage. After about 10 minutes, the program
ended with an error message („operational error“ or something of that kind).
(Just one line, no further details.)

The hard drive is a relatively recent Seagate Momentus 100 GB, 7200 RPM,
2,5", IDE, checked with smartctl regularly. The drive doesn't seem to be the
cause of this...

However, after the (probably unfinished) disk scan, I could still mount the
/home partition and KDE started just fine this time. The file system is
probably not in a consistent state right now. What could I do to stop
further corruption? What scan options should I use?

I am using ArchLinux and the reiser4progs package supplied with the distro.

Best regards,

Andrej Podzimek
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