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SubjectRe: [PATCH 1/1] mmap: Don't count shmem pages as free in __vm_enough_memory
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On Mon, Jul 4, 2011 at 4:39 AM, Dmitry Fink <finikk@gmail.com> wrote:
> shmem pages can't be reclaimed and if they are swapped out
> that doesn't affect the overall available memory in the system,
> so don't count them along with the rest of the file backed pages.
>
> Signed-off-by: Dmitry Fink <dmitry.fink@palm.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>

I am not sure the description is good. :(
But I think this patch is reasonable.

In swapless system,guessing overcommit can have a problem.
And in current implementation of OVERCOMMIT_GUESS, we consider anon
pages as empty space of swap so shmem pages should be accounted by
that.

--
Kind regards,
Minchan Kim


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