[xfs-masters] [Bug 1124] New: xfs hang on centos 7

[bugzilla-daemon at oss.sgi.com]

http://oss.sgi.com/bugzilla/show_bug.cgi?id=1124

            Bug ID: 1124
           Summary: xfs hang on centos 7
           Product: XFS
           Version: unspecified
          Hardware: All
                OS: Linux
            Status: RESOLVED
          Severity: critical
          Priority: P5
         Component: XFS kernel code
          Assignee: xfs-masters at oss.sgi.com
          Reporter: danny.webb at thehutgroup.com
    Classification: Unclassified
            Status: RESOLVED
        Resolution: FIXED

Created attachment 341
  --> http://oss.sgi.com/bugzilla/attachment.cgi?id=341&action=edit
debug files

0 ✓ gb1-li-lumberjack-004  ~ # rpm -qa|grep xfs
xfsprogs-3.2.0-0.10.alpha2.el7.x86_64
xfsdump-3.1.3-5.el7.x86_64
0 ✓ gb1-li-lumberjack-004  ~ # uname -a
Linux gb1-li-lumberjack-004 3.10.0-123.el7.x86_64 #1 SMP Mon Jun 30 12:09:22
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

I have a box running CentOS 7.0.1406 on which the /opt partition has hung and
become unresponsive.  Backing disk is a VMDK sitting on a HP 3Par 7200.  

mount reports as rw:

0 ✓ ~/xfs_issue # mount|grep opt
/dev/mapper/vg_root-opt on /opt type xfs
(rw,relatime,seclabel,attr2,inode64,noquota)

if you try and do any actions on the mount (even a lowly ls) the process hangs
in a blocking state.  Nothing has been reported to dmesg, /var/log/messages or
the journalctl logs.

I got some of the trace-cmd logs, but not sure how helpful they'll be as the
mount is already in the hung state.  I can't recreate the issue as I don't know
what causes it.  It has happened a few times on some other of our machines, all
running higher IO applications (postgres, elasticsearch).  

host was writing at ~12MB/s, reading at ~9MB/s at the time (based on our vmware
disk graphs).

--- Comment #1 from D Webb <danny.webb at thehutgroup.com> ---
*** Bug 1125 has been marked as a duplicate of this bug. ***

--- Comment #2 from D Webb <danny.webb at thehutgroup.com> ---
closing as per discussion in IRC.  issue was most likely fixed in a later
version of the  kernel than we were running.

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