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(parent: 3f78d1f) | patch
rps: avoid one atomic in enqueue_to_backlog
authorEric Dumazet <eric.dumazet@gmail.com>
Thu, 6 May 2010 23:51:21 +0000 (23:51 +0000)
committerDavid S. Miller <davem@davemloft.net>
Tue, 18 May 2010 00:18:50 +0000 (17:18 -0700)
commitebda37c27d0c768947e9b058332d7ea798210cf8
tree1c34bd9f9c2a87dcd150ad1fcc46a3adc6bb7ca2tree | snapshot
parent3f78d1f210ff89af77f042ab7f4a8fee39feb1c9commit | diff
rps: avoid one atomic in enqueue_to_backlog

If CONFIG_SMP=y, then we own a queue spinlock, we can avoid the atomic
test_and_set_bit() from napi_schedule_prep().

We now have same number of atomic ops per netif_rx() calls than with
pre-RPS kernel.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/dev.c diff | blob | history
https://github.com/torvalds/linux.git