PSOD due to abrupt interruption in the net-queue commit process

After upgrading ESXi host to 6.5 U1, hosts may experience the PSOD.

The PSOD stack looks like : 
2017-09-16T15:34:30.908Z cpu6:65645)@BlueScreen: #PF Exception 14 in world 65645:HELPER_UPLIN IP 0x41802c496258 addr 0x0PTEs:0x292379a027;0x2efe54c027;0xbfffffffff001;2017-09-16T15:34:30.908Z cpu6:65645)Code start: 0x41802c200000 VMK uptime: 4:02:26:10.1512017-09-16T15:34:30.908Z cpu6:65645)0x4390c369bd00:[0x41802c496258]UplinkTreePackQueueFilters@vmkernel#nover+0x188 stack: 0xe154270002017-09-16T15:34:30.909Z cpu6:65645)0x4390c369bd90:[0x41802c49e142]UplinkLB_LoadBalanceCB@vmkernel#nover+0x1e42 stack: 0x12017-09-16T15:34:30.909Z cpu6:65645)0x4390c369bf20:[0x41802c4916f2]UplinkAsyncProcessCallsHelperCB@vmkernel#nover+0x116 stack: 0x43048761eac02017-09-16T15:34:30.910Z cpu6:65645)0x4390c369bf50:[0x41802c2c9e0d]helpFunc@vmkernel#nover+0x3c5 stack: 0x4300b9b2a0502017-09-16T15:34:30.910Z cpu6:65645)0x4390c369bfe0:[0x41802c4c91b5]CpuSched_StartWorld@vmkernel#nover+0x99 stack: 0x02017-09-16T15:34:30.913Z cpu6:65645)base fs=0x0 gs=0x418041800000 Kgs=0x0

Contributing factors: 

  • The host is upgraded to 6.5 U1
  • It has 10G or more capacity NIC cards, such as elxnet FlexFabric 20Gb or FlexFabric 10Gb. But it is not restricted to only Emulex.

Cause : 

Netqueue commit phase abruptly stops due to a failure of hardware activation of an Rx queue.


The workaround for this issue is to downgrade the ESXi host to 6.0 U2. As 6.0 U2 has the fix for this issue.


This issue is resolved in VMware ESXi 6.5 P02 (ESXi-6.5.0-20171204001-standard)


Leave a comment