Re: kernel 2.6.22: what IS the VM doing?

Rik van Riel
2007-09-05T22:49:07Z

Sami Farin wrote:
> On Wed, Sep 05, 2007 at 12:24:26 -0400, Rik van Riel wrote:
> ...
>>> *shrug*
>> The attached patch should make sure kswapd does not free an
>> excessive number of pages in zone_normal just because the
>> pages in zone_highmem are difficult to free.
>>
>> It does give kswapd a large margin to continue putting equal
>> pressure on all zones in normal situations.
>>
>> Sami, could you try out this patch to see if it helps your
>> situation?
>
> Thanks, Rik. bzImage is ready, I probably reboot inside one
> month for a reason or other 8-)

The more I look at the bug, the more I see that it is probably
not very easy to reproduce on demand. I have, however, a full
explanation on why it happens and why the patch should fix it,
so I will submit it for inclusion in -mm.

Sami, thank you for the detailed bug report.

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