lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 16 Apr 2012 14:08:33 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	netdev@...r.kernel.org, xma@...ibm.com, davem@...emloft.net,
	linux-kernel@...r.kernel.org, mst@...hat.com
Cc:	ebiederm@...ssion.com
Subject: [PATCH 6/6] vhost_net: don't poll on -EFAULT

Currently, we restart tx polling unconditionally when sendmsg()
fails. This would cause unnecessary wakeups of vhost wokers as it's
only needed when the socket send buffer were exceeded. Fix this by
restart the tx polling only when sendmsg() returns value other than
-EFAULT.

Signed-off-by: Jason Wang <jasowang@...hat.com>
---
 drivers/vhost/net.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 29abd65..035fa95 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -262,7 +262,8 @@ static void handle_tx(struct vhost_net *net)
 					UIO_MAXIOV;
 			}
 			vhost_discard_vq_desc(vq, 1);
-			tx_poll_start(net, sock);
+			if (err != -EFAULT)
+				tx_poll_start(net, sock);
 			break;
 		}
 		if (err != len)

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists