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authorShaohua Li <shaohua.li@intel.com>2011-12-16 17:04:23 +0400
committerJens Axboe <axboe@kernel.dk>2011-12-16 17:04:23 +0400
commit6ae0516b8a50ece5d766be608a305707e0450060 (patch)
tree90e4768d9d984d94cb45464b49b9c62b93ffba9f /block/blk-map.c
parent4eabc941259f9d8c8fb71746d3f30c87e1d9e49b (diff)
downloadlinux-6ae0516b8a50ece5d766be608a305707e0450060.tar.xz
block, cfq: fix empty queue crash caused by request merge
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. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-map.c')
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