From: Dave Chinner <david@fromorbit.com>
To: "kautuk.c @samsung.com" <consul.kautuk@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>, Minchan Kim <minchan.kim@gmail.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Rik van Riel <riel@redhat.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: Why isn't shrink_slab more zone oriented ?
Date: Wed, 28 Sep 2011 10:04:29 +1000 [thread overview]
Message-ID: <20110928000429.GD3159@dastard> (raw)
In-Reply-To: <CAFPAmTRHFOT+tc=J-=jTBpvi8ksnp6H32UsEwptrrv=hagjUsA@mail.gmail.com>
On Mon, Sep 26, 2011 at 05:21:12PM +0530, kautuk.c @samsung.com wrote:
> Hi,
>
> I was going through the do_try_to_free_pages(), balance_pgdat(),
> __zone_reclaim()
> functions and I see that shrink_zone and shrink_slab are called for each zone.
>
> But, shrink_slab() doesn't seem to bother about the zone from where it
> is freeing
> memory.
Work is in progress to do this.
http://lwn.net/Articles/456071/
Dirty slab objects are currently not tracked in a manner that makes
per-zone reclaim efficient to do, os that needs to be corrected
first. Once we have generic per-zone LRU infrastructure, then we
can easily push zone reclaim hints down into the shrinkers for them
to scan the appropriate LRU....
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
WARNING: multiple messages have this Message-ID (diff)
From: Dave Chinner <david@fromorbit.com>
To: "kautuk.c @samsung.com" <consul.kautuk@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>, Minchan Kim <minchan.kim@gmail.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Rik van Riel <riel@redhat.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: Why isn't shrink_slab more zone oriented ?
Date: Wed, 28 Sep 2011 10:04:29 +1000 [thread overview]
Message-ID: <20110928000429.GD3159@dastard> (raw)
In-Reply-To: <CAFPAmTRHFOT+tc=J-=jTBpvi8ksnp6H32UsEwptrrv=hagjUsA@mail.gmail.com>
On Mon, Sep 26, 2011 at 05:21:12PM +0530, kautuk.c @samsung.com wrote:
> Hi,
>
> I was going through the do_try_to_free_pages(), balance_pgdat(),
> __zone_reclaim()
> functions and I see that shrink_zone and shrink_slab are called for each zone.
>
> But, shrink_slab() doesn't seem to bother about the zone from where it
> is freeing
> memory.
Work is in progress to do this.
http://lwn.net/Articles/456071/
Dirty slab objects are currently not tracked in a manner that makes
per-zone reclaim efficient to do, os that needs to be corrected
first. Once we have generic per-zone LRU infrastructure, then we
can easily push zone reclaim hints down into the shrinkers for them
to scan the appropriate LRU....
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
--
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next prev parent reply other threads:[~2011-09-28 0:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-26 11:51 Why isn't shrink_slab more zone oriented ? kautuk.c @samsung.com
2011-09-26 11:51 ` kautuk.c @samsung.com
2011-09-28 0:04 ` Dave Chinner [this message]
2011-09-28 0:04 ` Dave Chinner
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