https://lists.ubuntu.com/archives/kernel-team/2016-October/080309.html
** Also affects: linux (Ubuntu Yakkety)
Importance: Undecided
Assignee: Taco Screen team (taco-screen-team)
Status: New
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Xenial)
Status: New => In Progress
** Changed in: linux (Ubuntu Xenial)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
** Changed in: linux (Ubuntu Yakkety)
Status: New => In Progress
** Changed in: linux (Ubuntu Yakkety)
Assignee: Taco Screen team (taco-screen-team) => Tim Gardner (timg-tpi)
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https://bugs.launchpad.net/bugs/1632116
Title:
Paths not failed properly when unmapping virtual FC ports in VIOS
(using ibmvfc)
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Xenial:
In Progress
Status in linux source package in Yakkety:
In Progress
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://git.kernel.org/cgit/linux/kernel/git/mkp/scsi.git/commit/?h=for-next&id=07d0e9a847401ffd2f09bd450d41644cd090e81d
("scsi: ibmvfc: Fix I/O hang when port is not mapped")
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