On 2014-09-10 09:41, Christoph Hellwig wrote:
While it might not help with a blown stack, can you give the patch below
a try?  I tries to solve a problem where the timeout handler hits
before we've fully set up a command.  While I'd like to understand the
root cause of why we're hitting it as well, I'd also really to fix that
race. It would also be good to get a gdb listing of the exact area in
scsi_times_out listed in the oops.

It's a really long window, but it does exist. I'd be curious if the patch makes a difference for this weird case. I have not seen anything like it here.

BTW, please don't mix up the REQ_END and ->queue_rq() changes with the changed start_request API.

--
Jens Axboe

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