From: Ingo Molnar <mingo@elte.hu>
To: Rik van Riel <riel@conectiva.com.br>
Cc: Linus Torvalds <torvalds@transmeta.com>, linux-mm@kvack.org
Subject: Re: [patch] VM stable again?
Date: Mon, 15 May 2000 17:31:16 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.10.10005151729430.6248-100000@elte.hu> (raw)
In-Reply-To: <Pine.LNX.4.21.0005151157240.20410-100000@duckman.distro.conectiva>
On Mon, 15 May 2000, Rik van Riel wrote:
> - keep track of whether some process is critically low on
> memory and needs to call try_to_free_pages()
> - if another allocation starts while the other app is in
> try_to_free_pages(), free some memory ourselves
> - (skip point 2 if there is enough free memory, but that's
> just a minor performance optimisation)
yep, this should work. A minor comment:
> + if (atomic_read(&free_before_allocate))
i believe this needs to be per-zone and should preferably be read within
the zone spinlock - not atomic operations. Updating a global counter is a
big time problem on SMP.
Ingo
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next prev parent reply other threads:[~2000-05-15 15:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-05-15 15:12 Rik van Riel
2000-05-15 15:31 ` Ingo Molnar [this message]
2000-05-15 15:27 ` Rik van Riel
2000-05-15 16:15 ` Ingo Molnar
2000-05-15 18:36 ` Linus Torvalds
2000-05-15 18:29 ` Linus Torvalds
2000-05-15 19:01 ` Stephen C. Tweedie
2000-05-15 19:10 ` Rik van Riel
2000-05-15 19:30 ` Ingo Molnar
2000-05-15 19:27 ` Rik van Riel
2000-05-15 19:22 ` Ingo Molnar
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