From: Gerd Hoffmann <kraxel@redhat.com>
To: Geoffrey Lefebvre <geoffrey@cs.ubc.ca>
Cc: Derek Murray <Derek.Murray@cl.cam.ac.uk>,
Jeremy Fitzhardinge <jeremy@goop.org>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Eduardo Habkost <ehabkost@redhat.com>,
Juan Quintela <quintela@redhat.com>,
Jan Beulich <jbeulich@novell.com>,
Glauber de Oliveira Costa <gcosta@redhat.com>,
Chris Wright <chrisw@sous-sol.org>,
"virtualization@lists.osdl.org" <virtualization@lists.osdl.org>
Subject: Re: Re: Next steps with pv_ops for Xen
Date: Thu, 06 Dec 2007 11:15:57 +0100 [thread overview]
Message-ID: <4757CBDD.8040600@redhat.com> (raw)
In-Reply-To: <c3c918090712051235j6a4176c6t5145d6b9da78a5cd@mail.gmail.com>
Geoffrey Lefebvre wrote:
> In order to unmap a grant, you need the grant handle obtained when the
> grant is mapped. That handle needs to be stored somewhere for the
> lifetime of the mapping. Where would the handle be stored (as Gerd
> proposed) in order to be able to unmap from ptep_get_and_clear_full?
Sure. the kernel has to keep track of the grant mappings somewhere, so
it can lookup the grant handle from the available information. Hashing
by machine address should work reasonable fast. It's probably useful to
have an in-kernel API for that which then can be used by both gntdev and
the in-kernel backend drivers. This API can also abstract out
arch-specific bits to make life easier for the ia64 guys ...
cheers,
Gerd
next prev parent reply other threads:[~2007-12-06 10:15 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-21 22:05 Next steps with pv_ops for Xen Stephen C. Tweedie
2007-11-21 23:12 ` Jeremy Fitzhardinge
2007-11-26 14:02 ` Juan Quintela
2007-11-26 18:52 ` Jeremy Fitzhardinge
2007-11-27 8:30 ` Jan Beulich
2007-11-27 17:00 ` Jeremy Fitzhardinge
2007-11-27 17:14 ` Jan Beulich
2007-11-27 17:15 ` Stephen C. Tweedie
2007-12-03 12:54 ` Gerd Hoffmann
2007-12-03 13:19 ` Derek Murray
2007-12-03 14:16 ` Gerd Hoffmann
2007-12-03 14:51 ` Derek Murray
2007-12-03 17:18 ` Mark Williamson
2007-12-03 18:36 ` D.G. Murray
2007-12-03 19:08 ` Mark Williamson
2007-12-04 9:35 ` tgh
2007-12-05 3:42 ` Mark Williamson
2007-12-06 15:21 ` Gerd Hoffmann
2007-12-06 15:32 ` Derek Murray
2007-12-06 15:55 ` Gerd Hoffmann
2007-12-21 12:58 ` [Xen-devel] " Gerd Hoffmann
2007-12-03 20:38 ` Gerd Hoffmann
2007-12-04 9:40 ` Derek Murray
2007-12-04 12:01 ` Gerd Hoffmann
2007-12-04 12:39 ` Stephen C. Tweedie
2007-12-04 19:58 ` Gerd Hoffmann
2007-12-05 11:48 ` [Xen-devel] " Derek Murray
2007-12-05 13:19 ` Derek Murray
[not found] ` <47569014.8080008@cl.cam.ac.uk>
2007-12-05 14:12 ` Gerd Hoffmann
2007-12-05 14:22 ` Keir Fraser
2007-12-05 14:30 ` Derek Murray
2007-12-05 16:58 ` Keir Fraser
2007-12-05 17:17 ` Derek Murray
2007-12-05 17:22 ` Keir Fraser
2007-12-05 17:48 ` Derek Murray
2007-12-05 17:59 ` Keir Fraser
2007-12-05 18:15 ` Derek Murray
2007-12-12 8:27 ` Isaku Yamahata
2007-12-12 8:39 ` Keir Fraser
2007-12-12 8:44 ` Isaku Yamahata
2007-12-05 20:06 ` Gerd Hoffmann
2007-12-05 18:12 ` Jeremy Fitzhardinge
2007-12-05 18:29 ` Derek Murray
2007-12-05 20:15 ` Jeremy Fitzhardinge
2007-12-05 20:35 ` Geoffrey Lefebvre
2007-12-06 10:15 ` Gerd Hoffmann [this message]
2007-12-05 20:44 ` Keir Fraser
2007-12-06 10:00 ` Derek Murray
2007-12-06 19:55 ` [Xen-devel] " Jeremy Fitzhardinge
2007-12-05 10:03 ` Gerd Hoffmann
2007-12-05 12:51 ` Gerd Hoffmann
2007-12-05 10:11 ` Derek Murray
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