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Bug 1099932

Summary:	multipath: make fast_io_fail work for iscsi devices
Product:	Red Hat Enterprise Linux 6	Reporter:	Ben Marzinski <bmarzins>
Component:	device-mapper-multipath	Assignee:	Ben Marzinski <bmarzins>
Status:	CLOSED ERRATA	QA Contact:	yanfu,wang <yanwang>
Severity:	medium	Docs Contact:
Priority:	high
Version:	6.5	CC:	aberezin, agk, bazulay, bdonahue, bmarzins, ccui, cshao, dfediuck, dwysocha, fdeutsch, gouyang, hadong, heinzm, huiwa, iheim, janfrode, jboggs, jhunsaker, jkt, jmagrini, leiwang, lpeer, mkalinin, msnitzer, nsoffer, ovirt-maint, prajnoha, prockai, rbalakri, rhodain, scohen, slevine, yaniwang, yanwang, ycui, yeylon, zkabelac
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---	Flags:	scohen: needinfo+
Hardware:	x86_64
OS:	Linux
Whiteboard:	node
Fixed In Version:	device-mapper-multipath-0.4.9-76.el6	Doc Type:	Enhancement
Doc Text:	Feature: Add iscsi support for the fast_io_fail_tmo multipath.conf option. Reason: To allow users to modify how quickly multipath responds to failed iscsi devices with the same configuration option as they use for Fibre Channel devices.	Story Points:	---
Clone Of:	980139
Clones:	1137017 (view as bug list)		Environment:
Last Closed:	2014-10-14 07:43:27 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	980139, 1002699, 1081264, 1117499, 1137017

Comment 1 Ben Marzinski 2014-05-21 14:40:36 UTC

This bug is to deal with multipath allowing fast_io_fail_tmo to work with iscsi devices.

Comment 2 Ben Marzinski 2014-05-22 19:55:25 UTC

Setting fast_io_fail_tmo will now set

/sys/class/iscsi_session/session<n>/recovery_tmo

For iscsi devices.  This will allow the scsi layer to fail the IO errors back to to multipath sooner.

Comment 5 Nir Soffer 2014-09-03 08:21:27 UTC

Ben, will we get this version (0.4.9-80.el6) in 6.5z/7.0.z?

Comment 6 Ben Marzinski 2014-09-03 17:26:36 UTC

This already exists in 7.0.  You could request a rhel-6 zstream. I have no problem with that, but as far as I know, nobody has requested a zstream version of this fix for rhel-6.5.z

Comment 7 Nir Soffer 2014-09-03 18:29:03 UTC

Ben, I tested this on rhel 7.0, and I had to manually edit
the node files in /var/lib/iscsi/nodes to avoid 2 minutes timeout.

# rpm -q device-mapper-multipath
device-mapper-multipath-0.4.9-66.el7.x86_64

I guess that this system is not updated, but it is not my
system and I don't want to change it.

Sean, can you do the needed magic to get it in 6.5.z?

Comment 10 errata-xmlrpc 2014-10-14 07:43:27 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2014-1555.html