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SubjectRace condition in 2.2.12 buffers?
This is what I get on a 2.2.12 system with 3 UW-SCSI disks using a Symbios
875 and running plain disk-striping (old md, not new 0.90 code) across
two devices:

/dev/md0 raid0,4k,0,d143a62f /dev/sda2 /dev/sdb1 /dev/sdc1
/dev/md1 raid0,1024k,0,64861e07 /dev/sdb3 /dev/sdc3

The kernel seems to hang solid after running for about 48 hours under
heavy disk IO (it's a newsserver) with the following clue left in the
syslog (surprisingly, this was flushed out to disk cleanly; the log
partition is not on either of the md devices, it's on /dev/sda6):

Aug 31 12:08:48 kernel: Whoops: end_buffer_io_async: b_count != 1 on async io.

The machine did not react to keyboard or to network traffic anymore.
The latest log entry present on disk appeared about 46 seconds after this
bcount error.
--
Sincerely, srb@cuci.nl
Stephen R. van den Berg (AKA BuGless).

"My name is Smith, the P is not pronounced."

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