From: Avi Kivity <avi@qumranet.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Andrea Arcangeli <andrea@qumranet.com>,
kvm-devel@lists.sourceforge.net, linux-mm@kvack.org,
Daniel J Blueman <daniel.blueman@quadrics.com>
Subject: Re: [kvm-devel] mmu notifiers
Date: Sat, 12 Jan 2008 21:51:56 +0200 [thread overview]
Message-ID: <47891A5C.8060907@qumranet.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0801101103470.20353@schroedinger.engr.sgi.com>
Christoph Lameter wrote:
> On Thu, 10 Jan 2008, Avi Kivity wrote:
>
>
>> Actually sharing memory is possible even without this patch; one simply
>> mmap()s a file into the address space of both guests. Or are you referring to
>> something else?
>>
>
> A file from where? If a file is read by two guests then they will have
> distinct page structs.
>
>
Two kvm instances mmap() the file (from anywhere) into the guest address
space. That memory is shared, and will be backed by the same page
structs at the same offset.
--
Any sufficiently difficult bug is indistinguishable from a feature.
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next prev parent reply other threads:[~2008-01-12 19:51 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-09 18:19 Andrea Arcangeli
2008-01-09 21:54 ` Christoph Lameter
2008-01-10 11:44 ` [kvm-devel] " Avi Kivity
2008-01-10 13:16 ` Robin Holt
2008-01-10 13:27 ` Avi Kivity
2008-01-10 14:50 ` Robin Holt
2008-01-10 19:06 ` Christoph Lameter
2008-01-12 19:56 ` Avi Kivity
2008-01-10 19:04 ` Christoph Lameter
2008-01-12 19:51 ` Avi Kivity [this message]
2008-01-13 12:09 ` Robin Holt
2008-01-13 12:28 ` Avi Kivity
2008-01-14 19:51 ` Christoph Lameter
2008-01-15 7:43 ` Avi Kivity
2008-01-14 19:49 ` Christoph Lameter
2008-01-15 7:38 ` Avi Kivity
2008-01-15 17:39 ` Christoph Lameter
2008-01-15 17:53 ` Avi Kivity
2008-01-15 17:57 ` Christoph Lameter
2008-01-15 18:06 ` Avi Kivity
2008-01-15 18:16 ` Christoph Lameter
2008-01-16 7:39 ` Avi Kivity
2008-01-16 18:08 ` Christoph Lameter
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