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From: Brian <bmg300@yahoo.com>
To: linux-kernel@vger.kernel.org
Subject: Kernel VM bug?
Date: Sun, 27 Jun 2004 19:30:39 -0700 (PDT)	[thread overview]
Message-ID: <20040628023039.70960.qmail@web41505.mail.yahoo.com> (raw)

Hello list,

While doing massive memory allocation (I'm using GRASS to project NASA's BlueMarble maps) the
kernel apparently tries to kill grass but fails. When I try to access /proc/<grass_pid>/stat the
process hangs.

For example, an 'strace' of 'ps' ends like this:
open("/proc/1783/stat", O_RDONLY) = 6
read(6, <PS and strace hang here>

I am able to project a few files, but once the filesystem cache fills up, GRASS hangs or gives a
panic in vm_stat:381. The strange thing is, very little swap space is in use, and the filesystem
cache continues to use most of the RAM.

Is this a kernel bug, or do I need to use kernel 2.6.x (I am using kernel 2.4.26) and
/proc/sys/vm/overcommit_memory or similar hack?

Since I am a kernel-newbie, these links might help explain the problem better ;)
http://seclists.org/linux-kernel/2001/Dec/1604.html
http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10070.html

Brian G



		
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             reply	other threads:[~2004-06-28  2:30 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-06-28  2:30 Brian [this message]
2004-06-28  2:58 ` William Lee Irwin III
2004-06-28 13:01   ` Hugh Dickins
2004-06-28 20:18     ` William Lee Irwin III
2004-06-29 20:05   ` Brian
2004-06-29 20:09     ` William Lee Irwin III
2004-06-30  2:04   ` Kernel VM bug? (more info) Brian Gunlogson

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