From: Bernhard Schmidt <berni@birkenwald.de>
To: kvm@vger.kernel.org
Subject: hugetlbfs and KSM
Date: Thu, 8 Apr 2010 19:29:03 +0000 (UTC) [thread overview]
Message-ID: <hplapv$r0u$1@dough.gmane.org> (raw)
Hi,
running Debian Squeeze with a 2.6.32-3-amd64 kernel and qemu-kvm 0.12.3
I enabled hugetlbfs on a rather small box with about five similar VMs
today (all Debian Squeeze amd64, but different services)
Pro:
* system load on the host has gone way down (by about 50%)
Contra:
* KSM seems to be largely ineffective (100MB saved -> 1.3MB saved)
Am I doing something wrong? Is this a bug? Is this generally impossible
with large pages (which might explain the lower load on the host, if
large pages are not scanned)? Or is it just way less likely to have
identical pages at that size?
Bernhard
next reply other threads:[~2010-04-08 19:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-08 19:29 Bernhard Schmidt [this message]
2010-04-09 20:03 ` hugetlbfs and KSM Chris Wright
[not found] <579435996.2170.1270755367936.JavaMail.root@mail1.martinsales.net>
2010-04-08 19:36 ` David Martin
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