Paths not failed properly when unmapping virtual FC ports in VIOS (using ibmvfc)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Undecided
|
Tim Gardner | ||
Xenial |
Fix Released
|
Undecided
|
Tim Gardner | ||
Yakkety |
Fix Released
|
Undecided
|
Tim Gardner |
Bug Description
---Problem Description---
vios vfc unmap (vfcmap -vadapter vfchost0 -fcp) can result in no i/o being retried nor device offline.
---uname output---
Linux ubuntu16 4.4.0-9136-generic #55-Ubuntu SMP Fri Aug 26 05:56:24 UTC 2016 ppc64le ppc64le ppc64le GNU/Linux
Machine Type = Power8 LPAR
---Steps to Reproduce---
Ubuntu 16.10 lpar with two vfc adapters mapped to SAN Storage and configured with mulitpath.
In vios do: vfcmap -vadapter vfchost0 -fcp (where vfchost0 maps to test lpar). multipath -ll and lvm commands hang in linux lpar. tail /var/log/message hangs sometimes. multipath doesn't see failing devices and doesn't mark paths down.
Fyi ...
.... the following patch fixes the problem, which is now upstream accepted in the scsi tree as
http://
("scsi: ibmvfc: Fix I/O hang when port is not mapped")
CVE References
tags: | added: architecture-ppc64le bugnameltc-147428 severity-high targetmilestone-inin1610 |
Changed in ubuntu: | |
assignee: | nobody → Taco Screen team (taco-screen-team) |
affects: | ubuntu → linux (Ubuntu) |
Changed in linux (Ubuntu Yakkety): | |
status: | In Progress → Fix Committed |
Changed in linux (Ubuntu Xenial): | |
status: | In Progress → Fix Committed |
tags: |
added: verification-done-xenial verification-done-yakkety removed: verification-needed-xenial verification-needed-yakkety |
https:/ /lists. ubuntu. com/archives/ kernel- team/2016- October/ 080309. html