[LU-7966] LNetError: 4231:0:(linux-cpu.c:1081:cfs_cpu_init()) LBUG

Thu, 31 Mar 2016 11:38:11 +0000

Error happens during soak testing of build '20160324' (see https://wiki.hpdd.intel.com/display/Releases/Soak+Testing+on+Lola#SoakTestingonLola-20160324).
LNet run on IB (all nodes equipped with Mellanox HCAs 4xQDR )

Sequence of events

Error happened after a MDS node paniced (see ~~LU-7935~~) during MDT failback at 2016-03-29 14:53( umount of MDT). The MDT (lola-9) node
was unsuable (i.e no primary or secondary resources mounted) as the error occurred on the Lustre client described below. Anyway, evtl. this event isn't related.

Lustre client crash with the following error message:

<0>LNetError: 4231:0:(linux-cpu.c:1081:cfs_cpu_init()) ASSERTION( !(((current_thread_info()->preempt_count) & ((((1UL << (10))-1) << ((0 + 8) + 8)) | (((1UL << (8))-1) << (0 + 8)) | (((1UL << (1))-1) << (((0 + 8) + 8) + 10))))) || (((cpumask_size())) <= (2 << 12) && ((((((gfp_t)0x10u) | ((gfp_t)0x40u)))) & (((gfp_t)0x20u)))) != 0 ) failed: 
<0>LNetError: 4231:0:(linux-cpu.c:1081:cfs_cpu_init()) LBUG
<0>Kernel panic - not syncing: LBUG in interrupt.
<0>
<4>Pid: 4231, comm: modprobe Not tainted 2.6.32-504.30.3.el6.x86_64 #1
<4>Call Trace:
<4> [<ffffffff815293fc>] ? panic+0xa7/0x16f
<4> [<ffffffffa0478ebd>] ? lbug_with_loc+0x8d/0xb0 [libcfs]
<4> [<ffffffffa047dcfc>] ? cfs_cpu_init+0xc7c/0xcb0 [libcfs]
<4> [<ffffffff810a5525>] ? atomic_notifier_chain_register+0x55/0x60
<4> [<ffffffffa047875c>] ? libcfs_register_panic_notifier+0x1c/0x20 [libcfs]
<4> [<ffffffffa0482b70>] ? init_libcfs_module+0x0/0x340 [libcfs]
<4> [<ffffffffa0482b97>] ? init_libcfs_module+0x27/0x340 [libcfs]
<4> [<ffffffff8100204c>] ? do_one_initcall+0x3c/0x1d0
<4> [<ffffffff810c0181>] ? sys_init_module+0xe1/0x250
<4> [<ffffffff8100b0d2>] ? system_call_fastpath+0x16/0x1b

Attached files:
console, messages, vmcore-dmsg.txt of affected node lola-33.
Crash dump file is available.

Whamcloud Community JIRA

[LU-7966] LNetError: 4231:0:(linux-cpu.c:1081:cfs_cpu_init()) LBUG