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xen-devel
[Xen-devel] [SPAM] Re: [PATCH v6] xen network backend driver
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To: |
David Miller <davem@xxxxxxxxxxxxx> |
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Subject: |
[Xen-devel] [SPAM] Re: [PATCH v6] xen network backend driver |
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From: |
Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx> |
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Date: |
Wed, 16 Mar 2011 09:17:25 +0000 |
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Cc: |
"jeremy@xxxxxxxx" <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "herbert@xxxxxxxxxxxxxxxxxxx" <herbert@xxxxxxxxxxxxxxxxxxx>, "eric.dumazet@xxxxxxxxx" <eric.dumazet@xxxxxxxxx>, "konrad.wilk@xxxxxxxxxx" <konrad.wilk@xxxxxxxxxx>, "netdev@xxxxxxxxxxxxxxx" <netdev@xxxxxxxxxxxxxxx>, "mirqus@xxxxxxxxx" <mirqus@xxxxxxxxx>, "romieu@xxxxxxxxxxxxx" <romieu@xxxxxxxxxxxxx>, "bhutchings@xxxxxxxxxxxxxx" <bhutchings@xxxxxxxxxxxxxx>, "shemminger@xxxxxxxxxx" <shemminger@xxxxxxxxxx> |
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Wed, 16 Mar 2011 02:18:23 -0700 |
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www-data@xxxxxxxxxxxxxxxxxxx |
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Low |
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<20110315.193855.104049587.davem@xxxxxxxxxxxxx> |
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<1300183578.17339.2239.camel@xxxxxxxxxxxxxxxxxxxxxx> <20110315.193855.104049587.davem@xxxxxxxxxxxxx> |
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On Wed, 2011-03-16 at 02:38 +0000, David Miller wrote:
> From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
> Date: Tue, 15 Mar 2011 10:06:18 +0000
>
> > netback is the host side counterpart to the frontend driver in
> > drivers/net/xen-netfront.c. The PV protocol is also implemented by
> > frontend drivers in other OSes too, such as the BSDs and even Windows.
> >
> > The patch is based on the driver from the xen.git pvops kernel tree but
> > has been put through the checkpatch.pl wringer plus several manual
> > cleanup passes and review iterations. The driver has been moved from
> > drivers/xen/netback to drivers/net/xen-netback.
> >
> > One major change from xen.git is that the guest transmit path (i.e. what
> > looks like receive to netback) has been significantly reworked to remove
> > the dependency on the out of tree PageForeign page flag (a core kernel
> > patch which enables a per page destructor callback on the final
> > put_page). This page flag was used in order to implement a grant map
> > based transmit path (where guest pages are mapped directly into SKB
> > frags). Instead this version of netback uses grant copy operations into
> > regular memory belonging to the backend domain. Reinstating the grant
> > map functionality is something which I would like to revisit in the
> > future.
> >
> > Note that this driver depends on 2e820f58f7ad "xen/irq: implement
> > bind_interdomain_evtchn_to_irqhandler for backend drivers" which is in
> > linux next via the "xen-two" tree and is intended for the 2.6.39 merge
> > window:
> > git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git
> > stable/backends
> > this branch has only that single commit since 2.6.38-rc2 and is safe for
> > cross merging into the net branch.
> >
> > Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> > Reviewed-by: Ben Hutchings <bhutchings@xxxxxxxxxxxxxx>
>
> Ok, I merged that xen commit into my tree and then added this
> driver.
Awesome, thanks!
For the ML archives: the history which led to this patch was
2e820f58f7ad..db3afbafeffd which I have pushed to:
git://xenbits.xen.org/people/ianc/linux-2.6.git
upstream/dom0/backend/netback-history
The base of the cleanup/upstreaming work (i.e. the commit which
corresponds to xen.git 072407c789a0) is
git://xenbits.xen.org/people/ianc/linux-2.6.git
upstream/dom0/backend/netback-history-base
Ian.
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