Hi,
After a long time networking test case running, e1000 NIC driver may not
work anymore. At this time, system is okay, we can execute some
non-network command(such as ls, cp etc.), but if we execute network
command(ifconfig), system will hang there, can not get response anymore.
We add some log in driver and found this was caused by mutex nest, it
means normaly, one mutex got and then release, another mutex was got,
but when issue occur, from log, the first mutex was got, did not
release, then got mutex again:
/*****************************************************/
Jul 6 19:08:28 localhost kernel: e1000 0000:02:08.0: eth7:
e1000_reinit_safe set __E1000_RESETTING
Jul 6 19:08:28 localhost kernel: e1000 0000:02:08.0: eth7:
e1000_reinit_safe take adapter's mutex
Jul 6 19:08:28 localhost kernel: e1000 0000:02:08.0: eth7:
e1000_watchdog take adapter's mutex
Jul 6 19:08:28 localhost kernel: e1000 0000:02:03.0: eth3:
e1000_reinit_safe release adapter's mutex
Jul 6 19:08:28 localhost kernel: e1000 0000:02:03.0: eth3:
e1000_reinit_safe reset __E1000_RESETTING
/*****************************************************/
We made the following patch and applied this patch. This problem
disappeared.
Please comment on this patch.
Thanks a lot.
/***********************************************/
diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c
b/drivers/net/ethernet/intel/e1000/e1000_main.c
index 7569ebb..2878308 100644
--- a/drivers/net/ethernet/intel/e1000/e1000_main.c
+++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
@@ -2441,7 +2441,8 @@ static void e1000_watchdog(struct work_struct *work)
struct e1000_tx_ring *txdr = adapter->tx_ring;
u32 link, tctl;
- if (test_bit(__E1000_DOWN, &adapter->flags))
+ if (test_bit(__E1000_DOWN, &adapter->flags) ||
+ test_bit(__E1000_RESETTING, &adapter->flags))
return;
/***********************************************/
zhuyj
------------------------------------------------------------------------------
Get 100% visibility into Java/.NET code with AppDynamics Lite!
It's a free troubleshooting tool designed for production.
Get down to code-level detail for bottlenecks, with <2% overhead.
Download for free and get started troubleshooting in minutes.
http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk
_______________________________________________
E1000-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/e1000-devel
To learn more about Intel® Ethernet, visit
http://communities.intel.com/community/wired
