From: Mark McLoughlin <markmc@redhat.com>
Date: Mon, 17 Nov 2008 06:39:18 +0000 (-0800)
Subject: virtio_net: Recycle some more rx buffer pages
X-Git-Tag: v2.6.29-rc1~581^2~698
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0a888fd1f6320d1d9318c58de9bca3cef41546d6;p=pandora-kernel.git

virtio_net: Recycle some more rx buffer pages

Each time we re-fill the recv queue with buffers, we allocate
one too many skbs and free it again when adding fails. We should
recycle the pages allocated in this case.

A previous version of this patch made trim_pages() trim trailing
unused pages from skbs with some paged data, but this actually
caused a barely measurable slowdown.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (use netdev_priv)
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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