lkml.org 
[lkml]   [2010]   [Aug]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 2/7] vmscan: synchronous lumpy reclaim don't call congestion_wait()
    On Thu, Aug 05, 2010 at 03:13:03PM +0900, KOSAKI Motohiro wrote:
    > congestion_wait() mean "waiting quueue congestion is cleared".
    > That said, if the system have plenty dirty pages and flusher thread push
    > new request to IO queue conteniously, IO queue are not cleared
    > congestion status for long time. thus, congestion_wait(HZ/10) become
    > almostly equivalent schedule_timeout(HZ/10).
    >
    > However, synchronous lumpy reclaim donesn't need this
    > congestion_wait() at all. shrink_page_list(PAGEOUT_IO_SYNC) are
    > using wait_on_page_writeback() and it provide sufficient waiting.
    >
    > Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    Reviewed-by: Minchan Kim <minchan.kim@gmail.com>

    --
    Kind regards,
    Minchan Kim


    \
     
     \ /
      Last update: 2010-08-05 15:57    [W:0.026 / U:1.184 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site