On 11/16/2015 10:22 PM, James Bottomley wrote:
OK, could you justify this, please ... like with traces and things.
[ ... ]
If that isn't the case, we can fix it, but I'd like to see the evidence.
Hello James,
To my own surprise so far I have not yet been able to trigger a lockup
without this patch. After I had inserted an msleep() call at the start
of scsi_target_reap_ref_release() to delay the starget->state =
STARGET_DEL assignment I rebuilt and rebooted the kernel, started
multipathd and held a SCSI device open by creating a filesystem on it
and by mounting it. Next I removed all SRP targets (for p in
/sys/class/srp_remote_ports/*; do echo 1 >$p/delete & done). During this
test no lockup was reported.
Bart.
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