Re: [PATCH V5] Allow compaction of unevictable pages

From: Michal Hocko
Date: Fri Mar 13 2015 - 16:02:19 EST


On Fri 13-03-15 13:26:37, Eric B Munson wrote:
[...]
> +compact_unevictable
> +
> +Available only when CONFIG_COMPACTION is set. When set to 1, compaction is
> +allowed to examine the unevictable lru (mlocked pages) for pages to compact.
> +This should be used on systems where stalls for minor page faults are an
> +acceptable trade for large contiguous free memory. Set to 0 to prevent
> +compaction from moving pages that are unevictable.

It is not clear which behavior is default from this text.
--
Michal Hocko
SUSE Labs
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