From: Eric Dumazet <eric.dumazet@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: netdev <netdev@vger.kernel.org>
Subject: [PATCH net-next] net: allow better page reuse in splice(sock -> pipe)
Date: Thu, 19 Apr 2012 21:38:17 +0200 [thread overview]
Message-ID: <1334864297.2395.220.camel@edumazet-glaptop> (raw)
From: Eric Dumazet <edumazet@google.com>
splice() from socket to pipe needs linear_to_page() helper to transfert
skb header to part of page.
We can reset the offset in the current sk->sk_sndmsg_page if we are the
last user of the page.
Signed-off-by: Eric Dumazet <edumazet@google.com>
---
net/core/skbuff.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 43c490d..bf257de 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1565,6 +1565,9 @@ new_page:
} else {
unsigned int mlen;
+ /* If we are the only user of the page, we can reset offset */
+ if (page_count(p) == 1)
+ sk->sk_sndmsg_off = 0;
off = sk->sk_sndmsg_off;
mlen = PAGE_SIZE - off;
if (mlen < 64 && mlen < *len) {
next reply other threads:[~2012-04-19 19:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-19 19:38 Eric Dumazet [this message]
2012-04-21 20:31 ` [PATCH net-next] net: allow better page reuse in splice(sock -> pipe) David Miller
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