Re: [linux-next] kcompactd0 stuck in a CPU-burning loop

From: Sergey Senozhatsky
Date: Mon Jan 28 2019 - 05:51:55 EST


On (01/28/19 10:18), Vlastimil Babka wrote:
> On 1/28/19 9:57 AM, Sergey Senozhatsky wrote:
> > Hello,
> >
> > next-20190125
> >
> > kcompactd0 is spinning on something, burning CPUs in the meantime:
>
> Hi, could you check/add this to the earlier thread? Thanks.
>
> 20190126200005.GB27513@amd/T/#u">https://lore.kernel.org/lkml/20190126200005.GB27513@amd/T/#u

Hi,

Will reply here.
Thanks for the link, Vlastimil.

Will "test" Jan's patch (don't have a reproducer yet).
So far, I can confirm that

echo 3 > /proc/sys/vm/drop_caches

mentioned in that thread does "solve" the issue.

-ss