netdev - Re: macvtap MAX_SKB

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Message-ID: <5200B626.9030006@redhat.com>
Date:	Tue, 06 Aug 2013 16:39:02 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org, mst@...hat.com
Subject: Re: macvtap MAX_SKB_FRAGS fix...

On 08/06/2013 11:51 AM, David Miller wrote:
> Jason, I want to get that into v3.4.x -stable but it needs a backport
> and I'd rather someone like you who knows the code does it rather
> than I.
>
> The issue seems that be that the arguments to uarg->callback() were
> different back then.
>
> Thanks.

Sure.

For 3.4.x we need to pick c70aa540c7a9f67add11ad3161096fb95233aa2e
(vhost: zerocopy: poll vq in zerocopy callback) first to let the
backport work. The reason of different arguments is because 3.4.x does
not track DMA failure. So we can just do uarg->callback(uarg);

Please see the attached patches.

Thanks

View attachment "0001-vhost-zerocopy-poll-vq-in-zerocopy-callback.patch" of type "text/x-patch" (1229 bytes)

View attachment "0002-macvtap-do-not-zerocopy-if-iov-needs-more-pages-than.patch" of type "text/x-patch" (3917 bytes)