This bug was fixed in the package linux - 4.8.0-27.29
---------------
linux (4.8.0-27.29) yakkety; urgency=low
[ Seth Forshee ]
* Release Tracking Bug
- LP: #1635377
* proc_keys_show crash when reading /proc/keys (LP: #1634496)
- SAUCE: KEYS: ensure xbuf is large enough to fix buffer overflow in
proc_keys_show (LP: #1634496)
* Revert "If zone is so small that watermarks are the same, stop zone balance"
in yakkety (LP: #1632894)
- Revert "UBUNTU: SAUCE: (no-up) If zone is so small that watermarks are the
same, stop zone balance."
* lts-yakkety 4.8 cannot mount lvm raid1 (LP: #1631298)
- SAUCE: (no-up) dm raid: fix compat_features validation
* kswapd0 100% CPU usage (LP: #1518457)
- SAUCE: (no-up) If zone is so small that watermarks are the same, stop zone
balance.
* [Trusty->Yakkety] powerpc/64: Fix incorrect return value from
__copy_tofrom_user (LP: #1632462)
- SAUCE: (no-up) powerpc/64: Fix incorrect return value from
__copy_tofrom_user
* Ubuntu 16.10: Oops panic in move_page_tables/page_remove_rmap after running
memory_stress_ng. (LP: #1628976)
- SAUCE: (no-up) powerpc/pseries: Fix stack corruption in htpe code
* Paths not failed properly when unmapping virtual FC ports in VIOS (using
ibmvfc) (LP: #1632116)
- scsi: ibmvfc: Fix I/O hang when port is not mapped
* [Ubuntu16.10]KV4.8: kernel livepatch config options are not set
(LP: #1626983)
- [Config] Enable live patching on powerpc/ppc64el
* CONFIG_AUFS_XATTR is not set (LP: #1557776)
- [Config] CONFIG_AUFS_XATTR=y
* Yakkety update to 4.8.1 stable release (LP: #1632445)
- arm64: debug: avoid resetting stepping state machine when TIF_SINGLESTEP
- Using BUG_ON() as an assert() is _never_ acceptable
- usb: misc: legousbtower: Fix NULL pointer deference
- Staging: fbtft: Fix bug in fbtft-core
- usb: usbip: vudc: fix left shift overflow
- USB: serial: cp210x: Add ID for a Juniper console
- Revert "usbtmc: convert to devm_kzalloc"
- ALSA: hda - Adding one more ALC255 pin definition for headset problem
- ALSA: hda - Fix headset mic detection problem for several Dell laptops
- ALSA: hda - Add the top speaker pin config for HP Spectre x360
- Linux 4.8.1
* PSL data cache should be flushed before resetting CAPI adapter
(LP: #1632049)
- cxl: Flush PSL cache before resetting the adapter
* thunder nic: avoid link delays due to RX_PACKET_DIS (LP: #1630038)
- net: thunderx: Don't set RX_PACKET_DIS while initializing
* crypto/vmx/p8_ghash memory corruption (LP: #1630970)
- crypto: ghash-generic - move common definitions to a new header file
- crypto: vmx - Fix memory corruption caused by p8_ghash
- crypto: vmx - Ensure ghash-generic is enabled
* arm64: SPCR console not autodetected (LP: #1630311)
- of/serial: move earlycon early_param handling to serial
- [Config] CONFIG_ACPI_SPCR_TABLE=y
- ACPI: parse SPCR and enable matching console
- ARM64: ACPI: enable ACPI_SPCR_TABLE
- serial: pl011: add console matching function
* include/linux/security.h header syntax error with !CONFIG_SECURITYFS
(LP: #1630990)
- SAUCE: (no-up) include/linux/security.h -- fix syntax error with
CONFIG_SECURITYFS=n
* sha1-powerpc returning wrong results (LP: #1629977)
- crypto: sha1-powerpc - little-endian support
-- Seth Forshee <seth.fors...@canonical.com> Thu, 20 Oct 2016 14:09:37
-0500
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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:
Fix Committed
Status in linux source package in Xenial:
Fix Released
Status in linux source package in Yakkety:
Fix Released
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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