From: Andrew Morton <akpm@osdl.org>
To: Andi Kleen <ak@muc.de>
Cc: greearb@candelatech.com, nickpiggin@yahoo.com.au,
linux-kernel@vger.kernel.org
Subject: Re: BUG: Slowdown on 3000 socket-machines tracked down
Date: Thu, 10 Mar 2005 01:09:55 -0800 [thread overview]
Message-ID: <20050310010955.000ea843.akpm@osdl.org> (raw)
In-Reply-To: <m1is3zvprz.fsf@muc.de>
Andi Kleen <ak@muc.de> wrote:
>
> In general to solve it one has to increase /proc/sys/vm/freepages
> a lot.
/proc/sys/vm/min_free_kbytes
> It would be nice though if the VM tuned itself dynamically to a lot
> of GFP_ATOMIC requests. And maybe if GFP_ATOMIC was a bit more aggressive
> and did some simple minded reclaiming that would be helpful too.
> e.g. there could be a "easy to free" list in the VM for clean pages
> where freeing is simple enough that it could be made interrupt safe.
I spose we could autotune the free memory thresholds somehow, if there is
good reason and a testcase.
Or we could run page reclaim from hard IRQ context - that could be a bit
expensive in terms of CPU consumption and latency though.
next prev parent reply other threads:[~2005-03-10 9:10 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-05 17:10 BUG: Slowdown on 3000 socket-machines tracked down Christian Schmid
2005-03-07 0:45 ` Nick Piggin
2005-03-07 1:13 ` Ben Greear
2005-03-07 1:58 ` Christian Schmid
2005-03-07 2:57 ` Ben Greear
2005-03-07 5:14 ` Nick Piggin
2005-03-07 5:30 ` Willy Tarreau
2005-03-07 5:41 ` Nick Piggin
2005-03-07 5:42 ` Nick Piggin
2005-03-07 5:46 ` Willy Tarreau
2005-03-07 9:22 ` Ben Greear
2005-03-07 9:28 ` Nick Piggin
2005-03-08 6:30 ` Ben Greear
2005-03-08 16:41 ` Christian Schmid
2005-03-09 23:45 ` Ben Greear
2005-03-09 23:52 ` Christian Schmid
2005-03-10 0:18 ` Ben Greear
2005-03-10 0:24 ` Christian Schmid
2005-03-10 5:17 ` Andrew Morton
2005-03-10 9:00 ` Andi Kleen
2005-03-10 9:09 ` Andrew Morton [this message]
2005-03-10 9:12 ` Andi Kleen
2005-03-10 9:38 ` Andrew Morton
2005-03-10 19:03 ` Ben Greear
2005-03-10 18:51 ` Christian Schmid
2005-03-10 19:06 ` Christian Schmid
2005-03-11 15:29 ` Christian Schmid
2005-03-11 19:10 ` Ben Greear
2005-03-11 19:27 ` Christian Schmid
2005-03-14 4:40 ` Nick Piggin
2005-03-14 4:53 ` Christian Schmid
2005-03-14 5:04 ` Nick Piggin
2005-05-28 3:17 ` Christian Schmid
2005-06-08 2:26 ` Christian Schmid
2005-06-08 2:39 ` Nick Piggin
2005-06-08 2:44 ` Andrew Morton
2005-03-07 14:35 ` Christian Schmid
2005-03-07 23:37 ` Ben Greear
2005-03-07 2:07 ` Christian Schmid
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