From: Rik van Riel <riel@conectiva.com.br>
To: Andrew Morton <akpm@zip.com.au>
Cc: Scott Kaplan <sfkaplan@cs.amherst.edu>, linux-mm@kvack.org
Subject: Re: About the free page pool
Date: Mon, 2 Sep 2002 22:35:13 -0300 (BRT) [thread overview]
Message-ID: <Pine.LNX.4.44L.0209022233590.1857-100000@imladris.surriel.com> (raw)
In-Reply-To: <3D740C35.9E190D04@zip.com.au>
On Mon, 2 Sep 2002, Andrew Morton wrote:
> The most important are 1-order allocations (8k, for kernel stacks).
> The memory allocator will retry these allocations indefinitely, so
> they end up succeeding, somehow.
>
> I think there's a bug in there, actually. If all zones have enough
> free memory but there are no 1-order pages available, then the 1-order
> allocator tried to run page reclaim, which will say "nope, nothing
> needs doing". Eventually, someone else returns some memory and coalescing
> happens. It's not a very glorious part of the kernel design.
This is fixable with rmap, though. Another old item on my TODO list. ;(
regards,
Rik
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next prev parent reply other threads:[~2002-09-03 1:35 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-02 19:50 Scott Kaplan
2002-09-02 20:33 ` Andrew Morton
2002-09-02 20:50 ` Rik van Riel
2002-09-02 21:21 ` Andrew Morton
2002-09-02 21:15 ` Rik van Riel
2002-09-02 21:58 ` Scott Kaplan
2002-09-03 1:11 ` Andrew Morton
2002-09-03 1:35 ` Rik van Riel [this message]
2002-09-03 5:12 ` William Lee Irwin III
2002-09-03 5:43 ` Andrew Morton
2002-09-03 5:43 ` William Lee Irwin III
2002-09-03 16:46 ` Daniel Phillips
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