From: Rik van Riel <riel@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
safari-kernel@safari.iki.fi
Subject: Re: [PATCH] prevent kswapd from freeing excessive amounts of lowmem
Date: Thu, 06 Sep 2007 12:38:13 -0400 [thread overview]
Message-ID: <46E02CF5.3020301@redhat.com> (raw)
In-Reply-To: <20070905182305.e5d08acf.akpm@linux-foundation.org>
Andrew Morton wrote:
> I guess for a very small upper zone and a very large lower zone this could
> still put the scan balancing out of whack, fixable by a smarter version of
> "8*zone->pages_high" but it doesn't seem very likely that this will affect
> things much.
>
> Why doesn't direct reclaim need similar treatment?
Because we only go into the direct reclaim path once
every zone is at or below zone->pages_low, and the
direct reclaim path will exit once we have freed more
than swap_cluster_max pages.
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next prev parent reply other threads:[~2007-09-06 16:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-05 23:01 Rik van Riel
2007-09-06 1:23 ` Andrew Morton
2007-09-06 16:38 ` Rik van Riel [this message]
2007-09-06 22:34 ` Andrew Morton
2007-09-06 22:47 ` Rik van Riel
2007-09-07 12:24 ` Pavel Machek
2007-09-08 20:20 ` Rik van Riel
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