Messages in this thread | | | From | Michal Suchanek <> | Date | Fri, 20 Sep 2013 13:20:53 +0200 | Subject | Re: doing lots of disk writes causes oom killer to kill processes |
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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
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