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 for Android: free password hash cracker in your pocket
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <20231005140831.89117-1-roger.pau@citrix.com>
Date: Thu,  5 Oct 2023 16:08:31 +0200
From: Roger Pau Monne <roger.pau@...rix.com>
To: linux-kernel@...r.kernel.org
Cc: Ross Lagerwall <ross.lagerwall@...rix.com>,
	Roger Pau Monne <roger.pau@...rix.com>,
	Wei Liu <wei.liu@...nel.org>,
	Paul Durrant <paul@....org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Ian Campbell <Ian.Campbell@...rix.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	xen-devel@...ts.xenproject.org,
	netdev@...r.kernel.org
Subject: [PATCH] xen-netback: use default TX queue size for vifs

Do not set netback interfaces (vifs) default TX queue size to the ring size.
The TX queue size is not related to the ring size, and using the ring size (32)
as the queue size can lead to packet drops.  Note the TX side of the vif
interface in the netback domain is the one receiving packets to be injected
to the guest.

Do not explicitly set the TX queue length to any value when creating the
interface, and instead use the system default.  Note that the queue length can
also be adjusted at runtime.

Fixes: f942dc2552b8 ('xen network backend driver')
Signed-off-by: Roger Pau Monné <roger.pau@...rix.com>
---
 drivers/net/xen-netback/interface.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
index f3f2c07423a6..fc3bb63b9ac3 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -41,8 +41,6 @@
 #include <asm/xen/hypercall.h>
 #include <xen/balloon.h>
 
-#define XENVIF_QUEUE_LENGTH 32
-
 /* Number of bytes allowed on the internal guest Rx queue. */
 #define XENVIF_RX_QUEUE_BYTES (XEN_NETIF_RX_RING_SIZE/2 * PAGE_SIZE)
 
@@ -530,8 +528,6 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,
 	dev->features = dev->hw_features | NETIF_F_RXCSUM;
 	dev->ethtool_ops = &xenvif_ethtool_ops;
 
-	dev->tx_queue_len = XENVIF_QUEUE_LENGTH;
-
 	dev->min_mtu = ETH_MIN_MTU;
 	dev->max_mtu = ETH_MAX_MTU - VLAN_ETH_HLEN;
 
-- 
2.42.0


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ