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authorJens Axboe <jens.axboe@oracle.com>2006-10-31 14:21:55 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-31 08:12:45 -0800
commit5fccbf61be2a7f32d2002b04afca4c5009612a58 (patch)
tree1a7a09dcbf4b518cf5d695fa8dbe41e21a1ab413 /drivers/scsi
parenteafa6cb18ec7e5424ce54017b5ce6d11dff58b79 (diff)
[PATCH] CFQ: request <-> request merging rr_list fixup
In very rare circumstances would we be pruning a merged request and at the same time delete the implicated cfqq from the rr_list, and not readd it when the merged request got added. This could cause io stalls until that process issued io again. Fix it up by putting the rr_list add handling into cfq_add_rq_rb(), identical to how pruning is handled in cfq_del_rq_rb(). This fixes a hang reproducible with fsx-linux. Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/scsi')
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