Am 25.06.2012 16:48, schrieb Josef Bacik:
On Mon, Jun 25, 2012 at 08:45:02AM -0600, Stefan Priebe - Profihost AG wrote:
Thats weird, sysrq+w should have a bunch of stacktraces but it's empty, so
unless theres a bug theres nothing blocked. Is the box actually hung or is it
just taking forever? Maybe try sysrq+w again to see if the one you pasted was
just a fluke? Thanks,
This one looks better:
http://pastebin.com/raw.php?i=R4pztDRt
Ok looks like you have discard turned on.
Yes
> Can you turn that off and see if you
can still reproduce the deadlock? If so sysrq+w again, if not then I know where
to look ;). Thanks,
without discard i can't reproduce but random write speed with ceph
without discard is a LOT slower (around 8000 iops/s instead of
13000iops/s). So i don't know if it is discard or if i'm just not able
to trigger it.
Thanks!
Stefan
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