lkml.org 
[lkml]   [2015]   [Apr]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/3] mm/page_alloc: don't break highest order freepage if steal
On Mon, Apr 27, 2015 at 04:23:39PM +0900, Joonsoo Kim wrote:
> When we steal whole pageblock, we don't need to break highest order
> freepage. Perhaps, there is small order freepage so we can use it.
>

The reason why the largest block is taken is to reduce the probability
there will be another fallback event in the near future. Early on, there
were a lot of tests conducted to measure the number of external fragmenting
events and take steps to reduce them. Stealing the largest highest order
freepage was one of those steps.

--
Mel Gorman
SUSE Labs


\
 
 \ /
  Last update: 2015-04-27 10:41    [W:0.090 / U:0.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site