This is a note to let you know that I've just added the patch titled
net: release dst entry while cache-hot for GSO case too
to the 2.6.32-longterm tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/longterm/longterm-queue-2.6.32.git;a=summary
The filename of the patch is:
net-release-dst-entry-while-cache-hot-for-gso-case-too.patch
and it can be found in the queue-2.6.32 subdirectory.
If you, or anyone else, feels it should not be added to the 2.6.32 longterm
tree,
please let <[email protected]> know about it.
>From 068a2de57ddf4f472e32e7af868613c574ad1d88 Mon Sep 17 00:00:00 2001
From: Krishna Kumar <[email protected]>
Date: Wed, 9 Dec 2009 20:59:58 +0000
Subject: net: release dst entry while cache-hot for GSO case too
From: Krishna Kumar <[email protected]>
commit 068a2de57ddf4f472e32e7af868613c574ad1d88 upstream.
Non-GSO code drops dst entry for performance reasons, but
the same is missing for GSO code. Drop dst while cache-hot
for GSO case too.
Signed-off-by: Krishna Kumar <[email protected]>
Acked-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Andrey Vagin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/core/dev.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1747,6 +1747,14 @@ gso:
skb->next = nskb->next;
nskb->next = NULL;
+
+ /*
+ * If device doesnt need nskb->dst, release it right now while
+ * its hot in this cpu cache
+ */
+ if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
+ skb_dst_drop(nskb);
+
rc = ops->ndo_start_xmit(nskb, dev);
if (unlikely(rc != NETDEV_TX_OK)) {
nskb->next = skb->next;
Patches currently in longterm-queue-2.6.32 which might be from
[email protected] are
_______________________________________________
stable mailing list
[email protected]
http://linux.kernel.org/mailman/listinfo/stable
