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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Avi Kivity <avi@qumranet.com>
Cc: Robin Holt <holt@sgi.com>, Gerd Hoffmann <kraxel@redhat.com>,
Christoph Lameter <clameter@sgi.com>,
Andrea Arcangeli <andrea@qumranet.com>,
Andrew Morton <akpm@osdl.org>, Nick Piggin <npiggin@suse.de>,
linux-mm@kvack.org, steiner@sgi.com,
linux-kernel@vger.kernel.org, kvm-devel@lists.sourceforge.net,
daniel.blueman@quadrics.com, Hugh Dickins <hugh@veritas.com>
Subject: Re: [kvm-devel] [PATCH] export notifier #1
Date: Thu, 24 Jan 2008 15:03:07 +1100 [thread overview]
Message-ID: <1201147387.6815.29.camel@pasglop> (raw)
In-Reply-To: <47974C78.7050509@qumranet.com>
On Wed, 2008-01-23 at 16:17 +0200, Avi Kivity wrote:
> Robin Holt wrote:
> > On Wed, Jan 23, 2008 at 01:51:23PM +0100, Gerd Hoffmann wrote:
> >
> >> Jumping in here, looks like this could develop into a direction useful
> >> for Xen.
> >>
> >> Background: Xen has a mechanism called "grant tables" for page sharing.
> >> Guest #1 can issue a "grant" for another guest #2, which in turn then
> >> can use that grant to map the page owned by guest #1 into its address
> >> space. This is used by the virtual network/disk drivers, i.e. typically
> >> Domain-0 (which has access to the real hardware) maps pages of other
> >> guests to fill in disk/network data.
> >>
> >
> > This is extremely similar to what XPMEM is providing.
> >
> >
>
> I think that in Xen's case the page tables are the normal cpu page
> tables, not an external mmu (like RDMA, kvm, and XPMEM).
However, that will be useful to the DRI folks as modern video chips are
growing MMU with even page fault capabilities.
Ben.
next prev parent reply other threads:[~2008-01-24 4:04 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-13 16:24 [PATCH] mmu notifiers #v2 Andrea Arcangeli
2008-01-13 21:11 ` Benjamin Herrenschmidt
2008-01-14 20:02 ` Christoph Lameter
2008-01-15 4:28 ` Benjamin Herrenschmidt
2008-01-15 12:44 ` Andrea Arcangeli
2008-01-15 20:18 ` Benjamin Herrenschmidt
2008-01-16 1:06 ` Andrea Arcangeli
2008-01-16 9:01 ` Brice Goglin
2008-01-16 10:19 ` Andrea Arcangeli
2008-01-16 17:42 ` Rik van Riel
2008-01-16 17:48 ` Izik Eidus
2008-01-17 16:23 ` Andrea Arcangeli
2008-01-17 18:21 ` Izik Eidus
2008-01-17 19:32 ` Andrea Arcangeli
2008-01-21 12:52 ` [PATCH] mmu notifiers #v3 Andrea Arcangeli
2008-01-22 2:21 ` Rik van Riel
2008-01-22 14:12 ` [kvm-devel] " Avi Kivity
2008-01-22 14:43 ` Andrea Arcangeli
2008-01-22 20:08 ` [kvm-devel] [PATCH] mmu notifiers #v4 Andrea Arcangeli
2008-01-22 20:34 ` [kvm-devel] [PATCH] export notifier #1 Christoph Lameter
2008-01-22 22:31 ` Andrea Arcangeli
2008-01-22 22:53 ` Christoph Lameter
2008-01-23 10:27 ` Avi Kivity
2008-01-23 10:52 ` Robin Holt
2008-01-23 12:04 ` Andrea Arcangeli
2008-01-23 12:34 ` Robin Holt
2008-01-23 19:48 ` Christoph Lameter
2008-01-23 19:58 ` Robin Holt
2008-01-23 19:47 ` Christoph Lameter
2008-01-24 5:56 ` Avi Kivity
2008-01-24 12:26 ` Andrea Arcangeli
2008-01-24 12:34 ` Avi Kivity
2008-01-23 11:41 ` Andrea Arcangeli
2008-01-23 12:32 ` Robin Holt
2008-01-23 17:33 ` Andrea Arcangeli
2008-01-23 20:27 ` Christoph Lameter
2008-01-24 15:42 ` Andrea Arcangeli
2008-01-24 20:07 ` Christoph Lameter
2008-01-25 6:35 ` Avi Kivity
2008-01-23 20:18 ` Christoph Lameter
2008-01-24 14:34 ` Andrea Arcangeli
2008-01-24 14:41 ` Andrea Arcangeli
2008-01-24 15:15 ` Avi Kivity
2008-01-24 15:18 ` Avi Kivity
2008-01-24 20:01 ` Christoph Lameter
2008-01-22 23:36 ` Benjamin Herrenschmidt
2008-01-23 0:40 ` Christoph Lameter
2008-01-23 1:21 ` Robin Holt
2008-01-23 12:51 ` Gerd Hoffmann
2008-01-23 13:19 ` Robin Holt
2008-01-23 14:12 ` Gerd Hoffmann
2008-01-23 14:18 ` Robin Holt
2008-01-23 14:35 ` Gerd Hoffmann
2008-01-23 15:48 ` Robin Holt
2008-01-23 14:17 ` Avi Kivity
2008-01-24 4:03 ` Benjamin Herrenschmidt [this message]
2008-01-23 15:41 ` Andrea Arcangeli
2008-01-23 17:47 ` Gerd Hoffmann
2008-01-24 6:01 ` Avi Kivity
2008-01-24 6:45 ` Jeremy Fitzhardinge
2008-01-23 20:40 ` Christoph Lameter
2008-01-24 2:00 ` Enhance mmu notifiers to accomplish a lockless implementation (incomplete) Robin Holt
2008-01-24 4:05 ` Robin Holt
2008-01-22 19:28 ` [PATCH] mmu notifiers #v3 Peter Zijlstra
2008-01-22 20:31 ` Christoph Lameter
2008-01-22 20:31 ` Andrea Arcangeli
2008-01-22 22:10 ` Hugh Dickins
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