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author | Jens Axboe <axboe@suse.de> | 2006-06-13 10:26:10 +0400 |
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committer | Jens Axboe <axboe@nelson.home.kernel.dk> | 2006-06-23 19:10:39 +0400 |
commit | b31dc66a54ad986b6b73bdc49c8efc17cbad1833 (patch) | |
tree | 5591383c1cbffe11512da889c971f899333f1a44 /sound/pci/ice1712 | |
parent | 271f18f102c789f59644bb6c53a69da1df72b2f4 (diff) | |
download | linux-b31dc66a54ad986b6b73bdc49c8efc17cbad1833.tar.xz |
[PATCH] Kill PF_SYNCWRITE flag
A process flag to indicate whether we are doing sync io is incredibly
ugly. It also causes performance problems when one does a lot of async
io and then proceeds to sync it. Part of the io will go out as async,
and the other part as sync. This causes a disconnect between the
previously submitted io and the synced io. For io schedulers such as CFQ,
this will cause us lost merges and suboptimal behaviour in scheduling.
Remove PF_SYNCWRITE completely from the fsync/msync paths, and let
the O_DIRECT path just directly indicate that the writes are sync
by using WRITE_SYNC instead.
Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'sound/pci/ice1712')
0 files changed, 0 insertions, 0 deletions