Hi John,
You might be hitting LU-9230. There are some workarounds suggested in
the comments on the jira page, that worked for us, after some tweaking.
Regards
Deon
On 07/10/2017 05:28, john casu wrote:
with 2.8.0 or 2.10.0 client running on Centos 7.1511 (7.2), when I run
IOR
from a single node with 4 mpi processes & 100G file size, I get
messages like this:
Message from syslogd@c0 at Oct 6 21:12:43 ...
kernel:BUG: soft lockup - CPU#4 stuck for 23s! [ptlrpcd_00_04:32758]
Message from syslogd@c0 at Oct 6 21:12:43 ...
kernel:BUG: soft lockup - CPU#5 stuck for 23s! [ptlrpcd_00_07:32761]
Message from syslogd@c0 at Oct 6 21:12:43 ...
kernel:BUG: soft lockup - CPU#7 stuck for 23s! [socknal_sd00_03:32742]
Message from syslogd@c0 at Oct 6 21:12:43 ...
kernel:BUG: soft lockup - CPU#9 stuck for 23s! [ptlrpcd_01_05:307]
Message from syslogd@c0 at Oct 6 21:12:43 ...
kernel:BUG: soft lockup - CPU#14 stuck for 23s! [ptlrpcd_01_10:312]
Message from syslogd@c0 at Oct 6 21:12:43 ...
kernel:BUG: soft lockup - CPU#15 stuck for 23s! [ptlrpcd_01_08:310]
then my ssh session is terminated, and I'm unable to log back in again.
running with 2 threads works just fine, so I'm guessing I'm dealing with
some resource issue (probably memory).
Any one have any idea?
thanks,
-john c
p.s.
fyi, for completeness, the Lustre server-side is 2 OSS & 2 MDS/MGS
failover pairs
running 2.8.0 over ZFS, and appears to show no ill effects.
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