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(parent: 58c73bb) | patch
net: No dst refcounting in ip_queue_xmit()
authorEric Dumazet <eric.dumazet@gmail.com>
Mon, 10 May 2010 11:31:49 +0000 (11:31 +0000)
committerDavid S. Miller <davem@davemloft.net>
Tue, 18 May 2010 00:18:52 +0000 (17:18 -0700)
commitfe9e24cb380a81f71cf75ec1d8e69704870d0557
tree18977292fa858067f7cc4d7a7df8a69dd5562a3dtree | snapshot
parent58c73bb72aff552ddf881418617ce2f6975cf8ebcommit | diff
net: No dst refcounting in ip_queue_xmit()

TCP outgoing packets can avoid two atomic ops, and dirtying
of previously higly contended cache line using new refdst
infrastructure.

Note 1: loopback device excluded because of !IFF_XMIT_DST_RELEASE
Note 2: UDP packets dsts are built before ip_queue_xmit().

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/ip_output.c diff | blob | history
Linux Kernel Source Tree.