From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
To: davem@davemloft.net
Cc: Alexander Duyck <alexander.h.duyck@intel.com>,
netdev@vger.kernel.org, gospo@redhat.com, sassmann@redhat.com,
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Subject: [net-next 04/14] net: Fix issue with netdev_tx_reset_queue not resetting queue from XOFF state
Date: Mon, 12 Mar 2012 21:03:42 -0700 [thread overview]
Message-ID: <1331611432-30109-5-git-send-email-jeffrey.t.kirsher@intel.com> (raw)
In-Reply-To: <1331611432-30109-1-git-send-email-jeffrey.t.kirsher@intel.com>
From: Alexander Duyck <alexander.h.duyck@intel.com>
We are seeing dev_watchdog hangs on several drivers. I suspect this is due
to the __QUEUE_STATE_STACK_XOFF bit being set prior to a reset for link
change, and then not being cleared by netdev_tx_reset_queue. This change
corrects that.
In addition we were seeing dev_watchdog hangs on igb after running the
ethtool tests. We found this to be due to the fact that the ethtool test
runs the same logic as ndo_start_xmit, but we were never clearing the XOFF
flag since the loopback test in ethtool does not do byte queue accounting.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
drivers/net/ethernet/intel/igb/igb_main.c | 3 ++-
include/linux/netdevice.h | 1 +
2 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index fda8247..e96cef8 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -2752,6 +2752,8 @@ void igb_configure_tx_ring(struct igb_adapter *adapter,
txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
wr32(E1000_TXDCTL(reg_idx), txdctl);
+
+ netdev_tx_reset_queue(txring_txq(ring));
}
/**
@@ -3244,7 +3246,6 @@ static void igb_clean_tx_ring(struct igb_ring *tx_ring)
buffer_info = &tx_ring->tx_buffer_info[i];
igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
}
- netdev_tx_reset_queue(txring_txq(tx_ring));
size = sizeof(struct igb_tx_buffer) * tx_ring->count;
memset(tx_ring->tx_buffer_info, 0, size);
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index b195a34..4bf314f 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1939,6 +1939,7 @@ static inline void netdev_completed_queue(struct net_device *dev,
static inline void netdev_tx_reset_queue(struct netdev_queue *q)
{
#ifdef CONFIG_BQL
+ clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
dql_reset(&q->dql);
#endif
}
--
1.7.7.6
next prev parent reply other threads:[~2012-03-13 4:03 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-13 4:03 [net-next 00/14][pull request] Intel Wired LAN Driver Updates Jeff Kirsher
2012-03-13 4:03 ` [net-next 01/14] igb: fix ethtool offline test Jeff Kirsher
2012-03-13 4:03 ` [net-next 02/14] ixgbe: remove tie between NAPI work limits and interrupt moderation Jeff Kirsher
2012-03-13 4:03 ` [net-next 03/14] ixgbe: add support for byte queue limits Jeff Kirsher
2012-03-13 4:03 ` Jeff Kirsher [this message]
2012-04-20 21:19 ` [net-next 04/14] net: Fix issue with netdev_tx_reset_queue not resetting queue from XOFF state Tom Herbert
2012-04-20 21:31 ` John Fastabend
2012-04-21 3:24 ` Alexander Duyck
2012-04-21 6:01 ` Tom Herbert
2012-04-21 16:27 ` John Fastabend
2012-04-21 20:18 ` David Miller
2012-04-23 3:21 ` John Fastabend
2012-03-13 4:03 ` [net-next 05/14] net: Add memory barriers to prevent possible race in byte queue limits Jeff Kirsher
2012-03-13 4:03 ` [net-next 06/14] ixgbe: Do no clear Tx status bits since eop_desc provides enough info Jeff Kirsher
2012-03-13 4:03 ` [net-next 07/14] ixgbe: Reorder adapter contents for better cache utilization Jeff Kirsher
2012-03-13 4:03 ` [net-next 08/14] ixgbe: Address issues with Tx WHTRESH value not being set correctly Jeff Kirsher
2012-03-13 4:03 ` [net-next 09/14] ixgbe: Correct Adaptive Interrupt Moderation so that it will change values Jeff Kirsher
2012-03-13 4:03 ` [net-next 10/14] ixgbe: Default to queue pairs when number of queues is less than CPUs Jeff Kirsher
2012-03-13 4:03 ` [net-next 11/14] ixgbe: Drop unnecessary napi_schedule_prep and spare blank line from ixgbe_intr Jeff Kirsher
2012-03-13 4:03 ` [net-next 12/14] ixgbe: Allocate rings as part of the q_vector Jeff Kirsher
2012-03-13 4:03 ` [net-next 13/14] ixgbe: Add iterator for cycling through rings on a q_vector Jeff Kirsher
2012-03-13 4:03 ` [net-next 14/14] ixgbe: Simplify logic for ethtool loopback frame creation and testing Jeff Kirsher
2012-03-13 5:55 ` [net-next 00/14][pull request] Intel Wired LAN Driver Updates David Miller
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