Re: NIC Stability Problems Under Xen 4.4 / CentOS 6 / Linux 3.18

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On 28-03-2017 8:12, Kevin Stange wrote:
On 03/27/2017 04:03 PM, Kevin Stange wrote:
On 03/25/2017 02:35 PM, Sarah Newman wrote:
On 03/16/2017 04:22 PM, Kevin Stange wrote:

I still can't rest assured the NIC issue is fixed, but no 4.4 or 4.9 server has yet had a NIC issue, with some being up almost a full month. It looks promising! (I'm knocking on all the wood everywhere, though.)

I'm ready to call this conclusive. The problems I was having across the board seemed to be caused by something seriously broken in 3.18. Most of my servers are now on 4.9.13 or newer and everything has been working
very well.

I'm not going to post any further updates unless something breaks.
Thanks to everyone that provided tips and suggestions along the way.

Do you mind sharing what hardware have you been running the 4.9 kernel on other than "Supermicro X9DRT, Dual Xeon E5-2650, 2x I350, 2x 82571EB" and "Supermicro X9DRD-iF/LF, Dual Xeon E5-2630, 2x I350, 2x 82575EB" if any? Are you using any SATA/SAS controllers?

We have no expansion cards installed except for the dual-port gigabit
NICs.  We're using the onboard SATA controller for only the local Dom0
OS, and iSCSI and NFS for managing storage for VMs and images.

We've got some other motherboards as well, I think this list is exhaustive:

Supermicro X8DT3
Supermicro X8DT6
Supermicro X9DRD-iF/LF
Supermicro X9DRT
Supermicro X9SCL/X9SCM

These are -F variants which means they include a BMC chip with a
separate NIC.  A few of the X8DT3 are the LN4 variant, which has 4
onboard NICs and therefore we did not use an expansion NIC.

Here's one of our machines, which just crapped itself earlier today without being subjected to any significant load. Before the crash it was running kernel-3.18.44-20.el6.x86_64, now it's on kernel-4.9.13-22.el6.x86_64:
- Dell PowerEdge R620
- 2 x Intel(R) Xeon(R) CPU E5-2630 v2 @ 2.60GHz, 6 cores each
- Dual Intel 10-Gigabit X540-AT2 (rev 01)
Before the crash both em interfaces member of bond1, which connects to the storage network, had tx & rx checksumming turned off. xen_commandline: dom0_mem=1536M,max:2048M dom0_max_vcpus=1 dom0_vcpus_pin cpuinfo com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all

Adi Pircalabu
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