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xen-devel
Re: [Xen-devel] Re: Next steps with pv_ops for Xen
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dgm36@xxxxxxxxx |
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Subject: |
Re: [Xen-devel] Re: Next steps with pv_ops for Xen |
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From: |
Gerd Hoffmann <kraxel@xxxxxxxxxx> |
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Date: |
Thu, 06 Dec 2007 16:21:17 +0100 |
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xen-devel@xxxxxxxxxxxxxxxxxxx, 'Eduardo Habkost' <ehabkost@xxxxxxxxxx>, 'Juan Quintela' <quintela@xxxxxxxxxx>, "'Stephen C. Tweedie'" <sct@xxxxxxxxxx>, 'Jan Beulich' <jbeulich@xxxxxxxxxx>, 'Glauber de Oliveira Costa' <gcosta@xxxxxxxxxx>, 'Chris Wright' <chrisw@xxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, 'Mark Williamson' <mark.williamson@xxxxxxxxxxxx> |
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Thu, 06 Dec 2007 07:22:03 -0800 |
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Thunderbird 2.0.0.9 (X11/20071115) |
D.G. Murray wrote:
> Hi Mark,
>
>> Maybe a change to the gntdev userspace API to allow batching
>> of mapping requests?
>
> Something along the lines of the following?
>
> void *xc_gnttab_map_grant_refs(int xcg_handle,
> uint32_t count,
> uint32_t *domids,
> uint32_t *refs,
> int prot);
Yes, except that it should actually work ;)
It doesn't for me (Fedora 8 again). Grab xenner 0.9 (just uploaded),
edit blkbackd.c and flip the BATCH_MAPS from 0 to 1, compile, run, see
it not work.
With BATCH_MAPS being 0 blkbackd works nicely as blktap/tapdisk drop-in
replacement.
cheers,
Gerd
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