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| author | Benjamin LaHaise <[email protected]> | 2005-12-14 07:22:32 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2006-01-03 21:10:45 +0000 |
| commit | 830a1e5c212fb3fdc83b66359c780c3b3a294897 (patch) | |
| tree | 232215af3774d78aa179adb1612bfa5257af181d /net/unix/garbage.c | |
| parent | [NET]: Avoid atomic xchg() for non-error case (diff) | |
| download | kernel-830a1e5c212fb3fdc83b66359c780c3b3a294897.tar.gz kernel-830a1e5c212fb3fdc83b66359c780c3b3a294897.zip | |
[AF_UNIX]: Remove superfluous reference counting in unix_stream_sendmsg
AF_UNIX stream socket performance on P4 CPUs tends to suffer due to a
lot of pipeline flushes from atomic operations. The patch below
removes the sock_hold() and sock_put() in unix_stream_sendmsg(). This
should be safe as the socket still holds a reference to its peer which
is only released after the file descriptor's final user invokes
unix_release_sock(). The only consideration is that we must add a
memory barrier before setting the peer initially.
Signed-off-by: Benjamin LaHaise <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'net/unix/garbage.c')
0 files changed, 0 insertions, 0 deletions