From: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
To: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: linux-mm@kvack.org
Subject: Re: is there a "lru_cache_add_anon_tail"?
Date: Thu, 10 May 2012 13:32:07 -0400 [thread overview]
Message-ID: <CAHGf_=pDKciwPX4G0yJjzc0xmuqiSg=yHB20btJSYhN9cA7gug@mail.gmail.com> (raw)
In-Reply-To: <66ea94b0-2e40-44d1-9621-05f2a8257298@default>
On Thu, May 10, 2012 at 12:13 PM, Dan Magenheimer
<dan.magenheimer@oracle.com> wrote:
> (Still working on allowing zcache to "evict" swap pages...)
>
> Apologies if I got head/tail reversed as used by the
> lru queues... the "directional sense" of the queues is
> not obvious so I'll describe using different terminology...
>
> If I have an anon page and I would like to add it to
> the "reclaim soonest" end of the queue instead of the
> "most recently used so don't reclaim it for a long time"
> end of the queue, does an equivalent function similar to
> lru_cache_add_anon(page) exist?
>
AFAIK, no exist.
rotate_reclaimable_page() has similar requirement, but I doubt
you can reuse it. maybe you need new function by yourself.
But note, many people dislike add_anon_tail feature. -ck patch had
swap prefetch patch and it made performance decrease. I'm not
sure it is good improvemnt for zcache....
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next prev parent reply other threads:[~2012-05-10 17:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-10 16:13 Dan Magenheimer
2012-05-10 17:32 ` KOSAKI Motohiro [this message]
2012-05-11 16:21 ` Dan Magenheimer
2012-05-11 0:34 ` Minchan Kim
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