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    SubjectRe: [PATCH-RFC] cfq: Disable low_latency by default for 2.6.32
    Date
    > Signed-off-by: Mel Gorman <mel@csn.ul.ie>
    > ---
    > block/cfq-iosched.c | 2 +-
    > 1 files changed, 1 insertions(+), 1 deletions(-)
    >
    > diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
    > index aa1e953..dc33045 100644
    > --- a/block/cfq-iosched.c
    > +++ b/block/cfq-iosched.c
    > @@ -2543,7 +2543,7 @@ static void *cfq_init_queue(struct request_queue *q)
    > cfqd->cfq_slice[1] = cfq_slice_sync;
    > cfqd->cfq_slice_async_rq = cfq_slice_async_rq;
    > cfqd->cfq_slice_idle = cfq_slice_idle;
    > - cfqd->cfq_latency = 1;
    > + cfqd->cfq_latency = 0;
    > cfqd->hw_tag = 1;
    > cfqd->last_end_sync_rq = jiffies;
    > return cfqd;

    Great. Probably we can reenable this feature at 2.6.33. but there isn't any reason to take
    any risk at 2.6.32. i.e. This simple disabling is best. I like this.

    Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>





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