From: Jeff Davis <linux@j-davis.com>
To: linux-mm@kvack.org
Subject: OOM killer overcounts memory usage
Date: Mon, 06 Aug 2007 17:12:12 -0700 [thread overview]
Message-ID: <1186445532.27681.28.camel@dogma.ljc.laika.com> (raw)
The OOM killer badness() function (mm/oom_kill.c) overcounts shared
memory many times over when the memory is shared between a parent
process and its children.
Each byte of shared memory is counted 1+N/2 times for the parent, where
N is the number of children of the process with which the parent shares
memory.
We may not even want to count the parent's shared memory at all, because
there's already limit with kernel.shmmax.
Regards,
Jeff Davis
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reply other threads:[~2007-08-07 0:12 UTC|newest]
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