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From: Markus Armbruster <armbru@redhat.com>
To: Ian Campbell <Ian.Campbell@xensource.com>
Cc: Gerd Hoffmann <kraxel@suse.de>,
	Xen devel list <xen-devel@lists.xensource.com>,
	Keir Fraser <keir@xensource.com>
Subject: Re: 32-on-64: pvfb issue
Date: Fri, 19 Jan 2007 13:03:14 +0100	[thread overview]
Message-ID: <87r6trw7el.fsf@pike.pond.sub.org> (raw)
In-Reply-To: <1169203389.6453.23.camel@localhost.localdomain> (Ian Campbell's message of "Fri, 19 Jan 2007 10:43:09 +0000")

Ian Campbell <Ian.Campbell@xensource.com> writes:

> On Thu, 2007-01-18 at 18:31 +0000, Keir Fraser wrote:
>> This is even better than with blkfront/blkback because there are definitely
>> no PV-on-HVM pvfb driver frontends out in the wild (and it's HVM that makes
>> things harder).
>
> PV on HVM for fbfront is pretty hard since the kernel.org tree does not
> export zap_page_range to modules, neither do many of the older distro
> kernels I've looked at.
>
> I tried doing a compat version like with other such functions but it
> ended up pulling half of mm/memory.c into the compat layer which I don't
> like.
>
> Do I vaguely recall plans to get rid of the use of zap_page_range or is
> my memory playing tricks?
>
> Ian.

We'd like to replace zap_page_range() with unmap_mapping_range(), for
several good reasons:

* it is already fully exported,

* it deals with locking automatically via the address_space
  i_mmap_lock spinlock,

* it automatically iterates over all the vmas on the address_space
  without us having to loop over them ourselves.

  reply	other threads:[~2007-01-19 12:03 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-18 13:57 32-on-64: pvfb issue Gerd Hoffmann
2007-01-18 14:07 ` Keir Fraser
2007-01-18 15:00 ` Markus Armbruster
2007-01-18 15:35   ` Gerd Hoffmann
2007-01-18 15:53     ` Daniel P. Berrange
2007-01-18 16:34       ` Gerd Hoffmann
2007-01-18 16:55         ` Gerd Hoffmann
2007-01-18 17:05         ` Daniel P. Berrange
2007-01-18 18:31     ` Keir Fraser
2007-01-19  9:46       ` Gerd Hoffmann
2007-01-19  9:54       ` Gerd Hoffmann
2007-01-19 10:31         ` Markus Armbruster
2007-01-19 10:46           ` Gerd Hoffmann
2007-01-19 11:53             ` Markus Armbruster
2007-01-19 11:10         ` Keir Fraser
2007-01-19 11:43           ` Gerd Hoffmann
2007-01-19 12:01             ` Keir Fraser
2007-01-19 12:59               ` Gerd Hoffmann
2007-01-19 13:45                 ` Keir Fraser
2007-01-19 15:08                   ` Gerd Hoffmann
2007-01-19 15:22                     ` Keir Fraser
2007-01-19 15:31                       ` Gerd Hoffmann
2007-01-19 16:05                         ` Keir Fraser
2007-01-20  0:09                           ` [Patch] [VTPM_TOOLS] Add HVM support to vtpm_manager Scarlata, Vincent R
2007-01-22  7:50                           ` 32-on-64: pvfb issue Gerd Hoffmann
2007-01-22 14:01                             ` Gerd Hoffmann
2007-01-22 14:48                               ` Keir Fraser
2007-01-23 12:53                                 ` Gerd Hoffmann
2007-01-23 15:07                                   ` Keir Fraser
2007-01-23 15:56                                     ` Gerd Hoffmann
2007-01-24 11:23                                   ` Gerd Hoffmann
2007-01-24 12:02                                     ` Keir Fraser
2007-01-24 12:24                                     ` Markus Armbruster
2007-01-24 12:38                                       ` Gerd Hoffmann
2007-01-24 14:24                                         ` Markus Armbruster
2007-01-24 15:25                                           ` Gerd Hoffmann
2007-01-25 13:16                                   ` 32-on-64 broken in unstable Gerd Hoffmann
2007-01-25 13:25                                     ` Keir Fraser
2007-01-25 13:34                                       ` Gerd Hoffmann
2007-01-22 15:22                               ` 32-on-64: pvfb issue Markus Armbruster
2007-01-22 15:33                                 ` Gerd Hoffmann
2007-01-22 15:40                                   ` Keir Fraser
2007-01-19 16:06                         ` Markus Armbruster
2007-01-22  7:56                           ` Gerd Hoffmann
2007-01-19 10:43       ` Ian Campbell
2007-01-19 12:03         ` Markus Armbruster [this message]
2007-01-22 18:32       ` Does vt-x itself have perf. impact on Hypervisor w/o considering HVM? Liang Yang
2007-01-23 10:05         ` [Xen-users] " Petersson, Mats
2007-01-23 16:15           ` Liang Yang
2007-01-23 16:33             ` Petersson, Mats

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