diff options
author | Jens Axboe <jens.axboe@oracle.com> | 2009-04-06 14:48:07 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-06 08:04:54 -0700 |
commit | aeb6fafb8fa53266d70ca7474fcda2bdaf96524a (patch) | |
tree | ebe8e0c616a9dbfdfe5184b64d0150ea02d3d1b2 /arch/x86/pci/Makefile | |
parent | 644b2d99b7a8677a56909a7b1fde31677eba4471 (diff) |
block: Add flag for telling the IO schedulers NOT to anticipate more IO
By default, CFQ will anticipate more IO from a given io context if the
previously completed IO was sync. This used to be fine, since the only
sync IO was reads and O_DIRECT writes. But with more "normal" sync writes
being used now, we don't want to anticipate for those.
Add a bio/request flag that informs the IO scheduler that this is a sync
request that we should not idle for. Introduce WRITE_ODIRECT specifically
for O_DIRECT writes, and make sure that the other sync writes set this
flag.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/pci/Makefile')
0 files changed, 0 insertions, 0 deletions