| commit | 30e0dc28bff9dc456cdfc2aae4aca78b8b1a1cec | |
| author | Jens Axboe <jens.axboe@oracle.com> | |
| Mon, 20 Oct 2008 13:44:28 +0000 (20 15:44 +0200) | ||
| committer | Jens Axboe <jens.axboe@oracle.com> | |
| Mon, 29 Dec 2008 07:29:51 +0000 (29 08:29 +0100) | ||
| tree | cb72eba9e27bf893928189c832d29e97bbe132ad | treesnapshot (tar.gz zip) |
| parent | 31dcfab0ae6eb0340d456931df4d478e17efc65d | commitdiff |
cfq-iosched: remove limit of dispatch depth of max 4 times quantum
This basically limits the hardware queue depth to 4*quantum at any
point in time, which is 16 with the default settings. As CFQ uses
other means to shrink the hardware queue when necessary in the first
place, there's really no need for this extra heuristic. Additionally,
it ends up hurting performance in some cases.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This basically limits the hardware queue depth to 4*quantum at any
point in time, which is 16 with the default settings. As CFQ uses
other means to shrink the hardware queue when necessary in the first
place, there's really no need for this extra heuristic. Additionally,
it ends up hurting performance in some cases.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| block/cfq-iosched.c | diffblobblamehistory |