Re: [PATCH] Hugepages should be accounted as unevictable pages.

Rik van Riel
2009-06-23T21:56:26Z

Alok Kataria wrote:
> On Tue, 2009-06-23 at 14:24 -0700, Rik van Riel wrote:

>> I can see something reasonable on both sides of this
>> particular debate. However, even with this patch the
>> "unevictable" statistic does not reclaim the total
>> number of pages that are unevictable pages from a
>> zone, so I am not sure how it helps you achieve your
>> goal.
>
> Yes but most of the other memory (page table and others) which is
> unevictable is actually static in nature. IOW, the amount of this other
> kind of kernel unevictable pages can be actually interpolated from the
> amount of physical memory on the system.

That would be a fair argument, if it were true.

Things like page tables and dentry/inode caches vary
according to the use case and are allocated as needed.
They are in no way "static in nature".

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