From: Avi Kivity <avi@redhat.com>
To: Sasha Levin <levinsasha928@gmail.com>
Cc: penberg@kernel.org, mingo@elte.hu, gorcunov@gmail.com,
asias.hejun@gmail.com, kvm@vger.kernel.org, ajsween@sandia.gov
Subject: Re: [PATCH] kvm tools: mmap guest kernel instead of reading it into memory
Date: Mon, 12 Dec 2011 20:08:42 +0200 [thread overview]
Message-ID: <4EE6432A.7010709@redhat.com> (raw)
In-Reply-To: <1323701258-17443-1-git-send-email-levinsasha928@gmail.com>
On 12/12/2011 04:47 PM, Sasha Levin wrote:
> This patch mmaps guest kernel into it's own memory slot instead of reading
> it into the memory.
>
> The advantages are:
> - Smaller memory footprint (same effect as KSM if running multiple guests)
> - Faster loading of larger kernels.
>
How many COW faults do you get when loading a kernel? Would be
interesting to try both smp and up guests.
Surprisingly, there is no tracepoint for that that I can see, but you
can probe do_wp_page() and count it.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-12-12 18:09 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-12 14:47 [PATCH] kvm tools: mmap guest kernel instead of reading it into memory Sasha Levin
2011-12-12 14:54 ` Pekka Enberg
2011-12-12 17:47 ` Sasha Levin
2011-12-12 16:40 ` Andrew Walrond
2011-12-12 15:59 ` Pekka Enberg
2011-12-12 18:14 ` Sasha Levin
2011-12-12 18:03 ` Avi Kivity
2011-12-12 17:18 ` Ingo Molnar
2011-12-12 18:08 ` Avi Kivity [this message]
2011-12-12 18:10 ` Avi Kivity
2011-12-13 6:46 ` Sasha Levin
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