[Jfs-discussion] Deadlock in pdflush

[Alexander S. <20...@us...>]

Hi,

one of my servers encounters some kind of deadlock in the kernel every few
weeks that results in blocked processes. There is a large jfs volume and
every process that tries to write to it will block like shown below. Any
other volume continues to work fine. Sometimes this happens when a large
rm -rf is running, in this case I captured the traces when it was shutting
down.

Here is the sysrq output that shows all blocked processes -- I added another
touch process later on just for comparison (it seems to block equally):
http://paste.pocoo.org/show/34491/

The kernel is a 2.6.20-15 (feisty). 2.6.22 doesn't seem to work anymore
because the IDE controller driver was removed.

How can I avoid these issues?

Kind regards,
Alexander