From: William Lee Irwin III <wli@holomorphy.com>
To: Andrea Arcangeli <andrea@suse.de>
Cc: Andrew Morton <akpm@digeo.com>,
Norman Gaywood <norm@turing.une.edu.au>,
linux-kernel@vger.kernel.org
Subject: Re: Maybe a VM bug in 2.4.18-18 from RH 8.0?
Date: Thu, 5 Dec 2002 18:15:59 -0800 [thread overview]
Message-ID: <20021206021559.GK9882@holomorphy.com> (raw)
In-Reply-To: <20021206014429.GI1567@dualathlon.random>
On Fri, Dec 06, 2002 at 02:44:29AM +0100, Andrea Arcangeli wrote:
> Or it hurts when you can't allocate an inode because such 100M are in
> pagetables on a 64G box and you still have 60G free of highmem.
This is the zone vs. zone watermark stuff that penalizes/fails
allocations made with a given GFP mask from being satisfied by
fallback. This is largely old news wrt. various kinds of inability
to pressure those ZONE_NORMAL (maybe also ZONE_DMA) consumers.
Admission control for fallback is valuable, sure. I suspect the
question akpm raised is about memory utilization. My own issues are
centered around allocations targeted directly at ZONE_NORMAL,
which fallback prevention does not address, so the watermark patch
is not something I'm personally very concerned about.
64GB isn't getting any testing that I know of; I'd hold off until
someone's actually stood up and confessed to attempting to boot
Linux on such a beast. Or until I get some more RAM. =)
Bill
next prev parent reply other threads:[~2002-12-06 2:08 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-06 0:13 Maybe a VM bug in 2.4.18-18 from RH 8.0? Norman Gaywood
2002-12-06 1:00 ` Andrew Morton
2002-12-06 1:17 ` Andrea Arcangeli
2002-12-06 1:34 ` Andrew Morton
2002-12-06 1:44 ` Andrea Arcangeli
2002-12-06 2:15 ` William Lee Irwin III [this message]
2002-12-06 2:28 ` Andrea Arcangeli
2002-12-06 2:41 ` William Lee Irwin III
2002-12-06 5:25 ` Andrew Morton
2002-12-06 5:48 ` Andrea Arcangeli
2002-12-06 6:14 ` William Lee Irwin III
2002-12-06 6:55 ` Andrew Morton
2002-12-06 7:14 ` GrandMasterLee
2002-12-06 7:25 ` Andrew Morton
2002-12-06 7:34 ` GrandMasterLee
2002-12-06 7:51 ` Andrew Morton
2002-12-06 11:37 ` Christoph Hellwig
2002-12-06 16:19 ` GrandMasterLee
2002-12-06 14:57 ` Andrea Arcangeli
2002-12-06 15:12 ` William Lee Irwin III
2002-12-06 23:32 ` Andrea Arcangeli
2002-12-06 23:45 ` William Lee Irwin III
2002-12-06 23:57 ` Andrea Arcangeli
2002-12-06 6:00 ` William Lee Irwin III
2002-12-06 22:28 ` Andrea Arcangeli
2002-12-06 23:21 ` William Lee Irwin III
2002-12-06 23:50 ` Andrea Arcangeli
2002-12-07 0:30 ` William Lee Irwin III
2002-12-07 0:01 ` Andrew Morton
2002-12-07 0:21 ` William Lee Irwin III
2002-12-07 0:30 ` Andrew Morton
2002-12-07 2:19 ` Alan Cox
2002-12-07 1:46 ` William Lee Irwin III
2002-12-07 1:56 ` Andrea Arcangeli
2002-12-07 2:31 ` Alan Cox
2002-12-07 2:09 ` William Lee Irwin III
2002-12-07 0:22 ` Andrea Arcangeli
2002-12-07 0:35 ` Andrew Morton
2002-12-07 0:46 ` William Lee Irwin III
2002-12-07 10:55 ` Arjan van de Ven
2002-12-06 10:36 ` Arjan van de Ven
2002-12-06 14:23 ` William Lee Irwin III
2002-12-06 15:12 ` William Lee Irwin III
2002-12-06 22:34 ` Andrea Arcangeli
2002-12-07 18:27 ` Eric W. Biederman
2002-12-06 1:08 ` Andrea Arcangeli
[not found] <mailman.1039133948.27411.linux-kernel2news@redhat.com>
2002-12-06 0:35 ` Pete Zaitcev
2002-12-06 1:27 ` Norman Gaywood
2002-12-06 12:48 ` Rik van Riel
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