lkml.org 
[lkml]   [2013]   [Jan]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Subject: [PATCH] [lmk] improve ANR produce rate caused by high io wait on android,create a thread for lowmem killer instead of usingkswapd
On Fri, Dec 14, 2012 at 05:51:47PM +0000, Tu, Xiaobing wrote:
> Resend to fix the typo issue.
>
>
> Subject: [PATCH] [lmk] create a thread for low mem killer instead of using kswapd
>
> Currently low mem killer is registered as a shrinker and will be
> invoked by kswapd. Since low mem killer and kswapd has different
> criteria to invoke to work -- kswap wakes up when watermark of some
> certain order in zone is low, and low mem killer should do its job
> when free memory is below the min free threshold. In the case that
> the kswapd isn't waked up and lmk is, the killed process selected
> by lmk will release memory so that the kswapd doesn't need towork
> any more.So it is not appropriate to mix them together. A 20 minutes
> average vmstat shows that the iowait/page fault has huge improvement.
> In this way, it can reduce the chance of ANR due to high iowait.
>
> orignal:
> flt wa
> 62.70 2.00
>
> with patch
> flt wa
> 2.32 0.01
>
> Signed-off-by: Zhang Di <di.zhang@intel.com>
> Signed-off-by: xiaobing tu <xiaobing.tu@intel.com>
> ---
> drivers/staging/android/lowmemorykiller.c | 87 +++++++++++++++++++++++++++--
> mm/page_alloc.c | 7 ++-
> mm/vmscan.c | 2 +
> 3 files changed, 89 insertions(+), 7 deletions(-)

This patch breaks the build if the android code is not selected, please
fix this up and resend if you really need this.

thanks,

greg k-h


\
 
 \ /
  Last update: 2013-01-17 21:43    [W:0.072 / U:0.652 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site