lkml.org 
[lkml]   [2011]   [Feb]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 0/2] Reduce the amount of time compaction disables IRQs for V2
    On Fri, Feb 25, 2011 at 08:04:57PM +0000, Mel Gorman wrote:
    > Changelog since V1
    > o Fix initialisation of isolated (Andrea)
    >
    > The following two patches are aimed at reducing the amount of time IRQs are
    > disabled. It was reported by some ALSA people that transparent hugepages was
    > causing slowdowns on MIDI playback but I strongly suspect that compaction
    > running for smaller orders was also a factor. The theory was that IRQs
    > were being disabled for too long and sure enough, compaction was found to
    > be disabling IRQs for a long time. The patches reduce the length of time
    > IRQs are disabled when scanning for free pages and for pages to migrate.
    >
    > It's late in the cycle but the IRQs disabled times are sufficiently bad
    > that it would be desirable to have these merged for 2.6.38 if possible.
    >
    > mm/compaction.c | 35 ++++++++++++++++++++++++++++++-----
    > 1 files changed, 30 insertions(+), 5 deletions(-)

    both patches:

    Acked-by: Andrea Arcangeli <aarcange@redhat.com>


    \
     
     \ /
      Last update: 2011-02-25 21:11    [W:0.020 / U:0.760 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site