From: Jason Wang <jasowang@redhat.com>
To: smtp.corp.redhat.com@redhat.com, davem@davemloft.net,
mst@redhat.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Jason Wang <jasowang@redhat.com>
Subject: [net PATCH] tuntap: set SOCK_ZEROCOPY flag during open
Date: Sat, 8 Jun 2013 14:17:41 +0800 [thread overview]
Message-ID: <1370672261-30076-1-git-send-email-jasowang@redhat.com> (raw)
Commit 54f968d6efdbf7dec36faa44fc11f01b0e4d1990
(tuntap: move socket to tun_file) forgets to set SOCK_ZEROCOPY flag, which will
prevent vhost_net from doing zercopy w/ tap. This patch fixes this by setting
it during file open.
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/net/tun.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index f042b03..d2ddd6d 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -2155,6 +2155,8 @@ static int tun_chr_open(struct inode *inode, struct file * file)
set_bit(SOCK_EXTERNALLY_ALLOCATED, &tfile->socket.flags);
INIT_LIST_HEAD(&tfile->next);
+ sock_set_flag(&tfile->sk, SOCK_ZEROCOPY);
+
return 0;
}
--
1.7.1
next reply other threads:[~2013-06-11 13:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-08 6:17 Jason Wang [this message]
2013-06-09 7:18 ` Michael S. Tsirkin
2013-06-11 13:17 ` Michael S. Tsirkin
2013-06-12 7:45 ` David Miller
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