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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2012-04-05 03:05:35 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-04-05 19:04:27 -0400 |
| commit | 35f9c09fe9c72eb8ca2b8e89a593e1c151f28fc2 (patch) | |
| tree | 6e57508d6633c47b8846cfdbaefc33e6e0128a47 /net/ipv4 | |
| parent | 78d50217baf36093ab320f95bae0d6452daec85c (diff) | |
| download | linux-35f9c09fe9c72eb8ca2b8e89a593e1c151f28fc2.tar.gz linux-35f9c09fe9c72eb8ca2b8e89a593e1c151f28fc2.tar.bz2 linux-35f9c09fe9c72eb8ca2b8e89a593e1c151f28fc2.zip | |
tcp: tcp_sendpages() should call tcp_push() once
commit 2f533844242 (tcp: allow splice() to build full TSO packets) added
a regression for splice() calls using SPLICE_F_MORE.
We need to call tcp_flush() at the end of the last page processed in
tcp_sendpages(), or else transmits can be deferred and future sends
stall.
Add a new internal flag, MSG_SENDPAGE_NOTLAST, acting like MSG_MORE, but
with different semantic.
For all sendpage() providers, its a transparent change. Only
sock_sendpage() and tcp_sendpages() can differentiate the two different
flags provided by pipe_to_sendpage()
Reported-by: Tom Herbert <therbert@google.com>
Cc: Nandita Dukkipati <nanditad@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Tom Herbert <therbert@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: H.K. Jerry Chu <hkchu@google.com>
Cc: Maciej Żenczykowski <maze@google.com>
Cc: Mahesh Bandewar <maheshb@google.com>
Cc: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail>com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/tcp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 2ff6f45a76f4..5d54ed30e821 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -860,7 +860,7 @@ wait_for_memory: } out: - if (copied && !(flags & MSG_MORE)) + if (copied && !(flags & MSG_SENDPAGE_NOTLAST)) tcp_push(sk, flags, mss_now, tp->nonagle); return copied; |