lkml.org 
[lkml]   [2013]   [Sep]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: doing lots of disk writes causes oom killer to kill processes
Hello,

On 19 September 2013 10:07, Hillf Danton <dhillf@gmail.com> wrote:
> Hello Michal
>
> Take it easy please, the kernel is made by human hands.
>
> Can you please try the diff(and sorry if mail agent reformats it)?
>
> Best Regards
> Hillf
>
>
> --- a/mm/vmscan.c Wed Sep 18 08:44:08 2013
> +++ b/mm/vmscan.c Wed Sep 18 09:31:34 2013
> @@ -1543,8 +1543,11 @@ shrink_inactive_list(unsigned long nr_to
> * implies that pages are cycling through the LRU faster than
> * they are written so also forcibly stall.
> */
> - if (nr_unqueued_dirty == nr_taken || nr_immediate)
> + if (nr_unqueued_dirty == nr_taken || nr_immediate) {
> + if (current_is_kswapd())
> + wakeup_flusher_threads(0, WB_REASON_TRY_TO_FREE_PAGES);
> congestion_wait(BLK_RW_ASYNC, HZ/10);
> + }
> }
>
> /*
> --

I applied the patch and raised the dirty block ratios to 30/10 and the
default 60/40 while imaging a VM and did not observe any problems so I
guess this solves it.

Thanks

Michal


\
 
 \ /
  Last update: 2013-09-20 13:41    [W:0.067 / U:1.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site