Re: Kernel 2.6.25-rc4: lock up when writing onto DM-Crypt volume

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Ulrich Lukas wrote:
> I observed a reproducible bug after switching from Linux 2.6.24 to the
> latest 2.6.25-rc4 kernel. On Linux 2.6.24 I had no such problem.
> 
> When writing to a slightly bigger DM-Crypt-LUKS volume, I experience
> lock-ups in the form of stuck, non-terminating, non-"kill -9"-able
> processes.

Probably different issue, but please try to use this patch too:
http://www2.kernel.org/pub/linux/kernel/people/agk/patches/2.6/editing/dm-crypt-add-cond_resched.patch

> # setup loop-device:
> LOOP=`losetup -s -f crypt.img`
> echo "Using loop device $LOOP"

Is it reproducible without loop involved?

> dd if=/dev/zero of=/mnt/testFile bs=1M count=2500
> # .... .... ... Nothing. Hangs....
> # (If not: trying a few more times seems to always work
> # producing the hang...

please could you send output of "echo t >/proc/sysrq-trigger" ?
- in syslog, (run when system in hang)

Milan
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