From: Sasha Levin <levinsasha928@gmail.com>
To: Pekka Enberg <penberg@kernel.org>
Cc: 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 19:47:35 +0200 [thread overview]
Message-ID: <1323712055.3269.1.camel@lappy> (raw)
In-Reply-To: <CAOJsxLEyS_DDjcR9b-zFtrh86Pm9KFBXNRzqQahhR5WJUqd2Ng@mail.gmail.com>
On Mon, 2011-12-12 at 16:54 +0200, Pekka Enberg wrote:
> On Mon, Dec 12, 2011 at 4:47 PM, Sasha Levin <levinsasha928@gmail.com> 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)
>
> KSM isn't free so it's smaller footprint with less CPU cycles. It's
> mostly useful for the special case of running tons of guests using the
> same kernel image.
Another usecase which I've only first heard about couple of days ago is
loading extremely large bzImages. Those images are 300MB+ in size and
come with built in filesystem. Apparently it's some sort of a livecd
variant.
--
Sasha.
next prev parent reply other threads:[~2011-12-12 15:48 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 [this message]
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
2011-12-12 18:10 ` Avi Kivity
2011-12-13 6:46 ` Sasha Levin
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