cfq-iosched: Convert from jiffies to nanoseconds

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Convert all time-keeping in CFQ IO scheduler from jiffies to nanoseconds
so that we can later make the intervals more fine-grained than jiffies.
One jiffie is several miliseconds and even for today's rotating disks
that is a noticeable amount of time and thus we leave disk unnecessarily
idle.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>

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Jeff Moyer

2016-06-08 08:55:34 -06:00

committed by Jens Axboe

parent 28a8f0d317

commit 9a7f38c42c

1 changed files with 136 additions and 137 deletions

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block/cfq-iosched.c

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