[lkml]   [2011]   [Feb]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
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 <>

 \ /
  Last update: 2011-02-25 21:11    [W:0.094 / U:1.696 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site