https://bugzilla.kernel.org/show_bug.cgi?id=47701
Joe Lawrence <joe.lawre...@stratus.com> changed:
What |Removed |Added
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CC| |joe.lawre...@stratus.com
--- Comment #2 from Joe Lawrence <joe.lawre...@stratus.com> 2012-10-07
02:20:43 ---
Stratus noticed a similar crash (hang actually) earlier this week when removing
a single SAS disk as part of a RAID 1 MD mirror. In our instance, the all CPUs
were idle, except one that was running scsi_target_reap and another waiting on
RCU synchronize_sched. Since the former function was stuck in some loop, RCU
stalled and the machine wedged. Another Stratus engineer noticed patch [1],
and once applied to our kernel, MD/mpt2sas disk removal no longer hung the
machine.
[1] [SCSI] scsi_remove_target: fix softlockup regression on hot remove
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=bc3f02a795d3b4faa99d37390174be2a75d091bd
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