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authorMichael S. Tsirkin <mst@redhat.com>2012-11-01 09:16:22 +0000
committerDavid S. Miller <davem@davemloft.net>2012-11-02 21:29:57 -0400
commite19d6763cc300fcb706bd291b24ac06be71e1ce6 (patch)
tree05608ee69740360480b4c66a368eb21987993058 /net/core
parent202975b4c522c197e4e2269d389aafbf056a4c37 (diff)
downloadblackbird-op-linux-e19d6763cc300fcb706bd291b24ac06be71e1ce6.tar.gz
blackbird-op-linux-e19d6763cc300fcb706bd291b24ac06be71e1ce6.zip
skb: report completion status for zero copy skbs
Even if skb is marked for zero copy, net core might still decide to copy it later which is somewhat slower than a copy in user context: besides copying the data we need to pin/unpin the pages. Add a parameter reporting such cases through zero copy callback: if this happens a lot, device can take this into account and switch to copying in user context. This patch updates all users but ignores the passed value for now: it will be used by follow-up patches. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/skbuff.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 6e04b1fa11f2..4abdf71a23f8 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -519,7 +519,7 @@ static void skb_release_data(struct sk_buff *skb)
uarg = skb_shinfo(skb)->destructor_arg;
if (uarg->callback)
- uarg->callback(uarg);
+ uarg->callback(uarg, true);
}
if (skb_has_frag_list(skb))
@@ -797,7 +797,7 @@ int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask)
for (i = 0; i < num_frags; i++)
skb_frag_unref(skb, i);
- uarg->callback(uarg);
+ uarg->callback(uarg, false);
/* skb frags point to kernel buffers */
for (i = num_frags - 1; i >= 0; i--) {
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