Messages in this thread | | | Date | Fri, 16 Dec 2011 13:56:33 +0100 | From | Jens Axboe <> | Subject | Re: [patch 1/2]block, cfq: fix empty queue crash caused by request merge |
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On 2011-12-16 02:52, Shaohua Li wrote: > All requests of a queue could be merged to other requests of other queue. > Such queue will not have request in it, but it's in service tree. This > will cause kernel oops. > I encounter a BUG_ON() in cfq_dispatch_request() with next patch, but the > issue should exist without the patch.
Good catch, yes I think this could happen if you just happen to have a very deliberate/unlucky set of processes and timings. Applied.
-- Jens Axboe
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