Le 03/12/2013 13:50, Dave Chinner a écrit :
On Tue, Dec 03, 2013 at 10:53:58AM +0100, Emmanuel Lacour wrote:
OK, 32GB RAM, no obvious shortage, no dirty or writeback data. 2TB
SATA drives, 32AGs, only unusual setting is 64k directory block size.
Yup, there's your problem:
I can confirm I also saw this from times to times, in the very same
context (ceph OSD, xfs volume with 64k directory blocks)
I never took the time to fully report the problem because it was very
sporadic, and I suspected a specific option in my hand-made kernels, in
which the problem seems to occurs more often. With the 'standard'
debian 3.10.2 (from testing) I never saw the problem (56 days uptime)
the report isn't complete here ... sometimes I just have the deadlock,
but without oops.
can try to dig deeper inmy old logs to be sure it's really the same
Yann Dupont - Service IRTS, DSI Université de Nantes
Tel : 02.53.48.49.20 - Mail/Jabber : Yann.Dupont@xxxxxxxxxxxxxx