| commit | 63de428b139d3d31d86ebe25ae97b33f6540fb7e | |
| author | Aaron Carroll <aaronc@gelato.unsw.edu.au> | |
| Thu, 14 Aug 2008 08:17:13 +0000 (14 18:17 +1000) | ||
| committer | Jens Axboe <jens.axboe@oracle.com> | |
| Thu, 9 Oct 2008 06:56:02 +0000 (9 08:56 +0200) | ||
| tree | def85c8e9990293effe71baf3b0dce648eab516c | treesnapshot (tar.gz zip) |
| parent | 766ca4428d1239a970926856c447310c9c191af2 | commitdiff |
deadline-iosched: allow non-sequential batching
Deadline currently only batches sector-contiguous requests, so except
for a few circumstances (e.g. requests in a single direction), it is
essentially first come first served. This is bad for throughput, so
change it to CSCAN, which means requests in a batch do not need to be
sequential and are issued in increasing sector order.
Signed-off-by: Aaron Carroll <aaronc@gelato.unsw.edu.au>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Deadline currently only batches sector-contiguous requests, so except
for a few circumstances (e.g. requests in a single direction), it is
essentially first come first served. This is bad for throughput, so
change it to CSCAN, which means requests in a batch do not need to be
sequential and are issued in increasing sector order.
Signed-off-by: Aaron Carroll <aaronc@gelato.unsw.edu.au>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| block/deadline-iosched.c | diffblobblamehistory |