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| author | Ken Chen <kenneth.w.chen@intel.com> | 2005-04-16 15:25:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:25:43 -0700 |
| commit | a299738283a654544c75167d190d9e87b77e5fb7 (patch) | |
| tree | 653e92ba3b9b19cbfe0d86d64d573eab7886b193 /fs | |
| parent | 975e046cc06005bafe0c5ce81d55a1b1eb84f5a1 (diff) | |
| download | linux-stable-a299738283a654544c75167d190d9e87b77e5fb7.tar.gz linux-stable-a299738283a654544c75167d190d9e87b77e5fb7.tar.bz2 linux-stable-a299738283a654544c75167d190d9e87b77e5fb7.zip | |
[PATCH] use cheaper elv_queue_empty when unplug a device
In function __generic_unplug_device(), kernel can use a cheaper function
elv_queue_empty() instead of more expensive elv_next_request to find
whether the queue is empty or not. blk_run_queue can also made conditional
on whether queue's emptiness before calling request_fn().
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions