From: Ken Savage <kens1835@shaw.ca>
To: linux-kernel@vger.kernel.org
Subject: Re: High CPU load with kswapd and heavy disk I/O
Date: Tue, 12 Aug 2003 17:14:36 -0700 [thread overview]
Message-ID: <200308121714.36993.kens1835@shaw.ca> (raw)
In-Reply-To: <3F397CED.6060006@vgertech.com>
On Tue August 12 2003 16:49, Nuno Silva wrote:
> My guess is that this is the cause. LOWMEM pressure because of very
> large directories... Relating to this, linux-2.6.0-test3-mm1 has Ingo's
> 4G/4G memory split. Can you try this kernel, enable 4G/4G feature, and
> report back?
Something about the 2.6 (and the rmap patched 2.4) kernels causes
lockouts on the server -- for reasons OTHER than kswapd. The server
running the delete-old-files process runs hundreds of other CPU and disk
I/O intensive processes/threads, and it doesn't look like 2.6 is yet able
to handle the load. Unfortunately, the server is a production environment
machine at a remote site, so lockouts/reboots/kernel panics are baaaad :(
I've seen other mentions of kswapd/kupdated problems in 2.4.xx, but
few mentions of solutions. Have people just learned to avoid the
situations that trigger the mad thrashes?
Ken
next prev parent reply other threads:[~2003-08-13 0:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-12 18:36 High CPU load with kswapd and heavy disk I/O Ken Savage
2003-08-12 19:44 ` Nuno Silva
2003-08-12 20:23 ` Ken Savage
2003-08-12 23:49 ` Nuno Silva
2003-08-13 0:14 ` Ken Savage [this message]
2003-08-13 15:36 ` Nuno Silva
2003-08-13 15:34 HABBINGA,ERIK (HP-Loveland,ex1)
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