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xfs_growfs causing "Metadata corruption detected at xfs_agf_read_verify"

To: xfs@xxxxxxxxxxx
Subject: xfs_growfs causing "Metadata corruption detected at xfs_agf_read_verify"
From: "Richard W.M. Jones" <rjones@xxxxxxxxxx>
Date: Thu, 17 Mar 2016 22:48:03 +0000
Delivered-to: xfs@xxxxxxxxxxx
User-agent: Mutt/1.5.20 (2009-12-10)
With recent kernels (or maybe xfsprogs?) we've noticed strange
filesystem corruption after using xfs_growfs.

Examples:

https://bugzilla.redhat.com/show_bug.cgi?id=1315895 (on aarch64)
https://www.redhat.com/archives/libguestfs/2016-March/msg00113.html (x86_64)
https://rwmj.wordpress.com/2015/11/04/virt-builder-fedora-23-image/#comment-15668
 (x86_64)

Do these errors look familiar?  I don't yet have a simple test case,
still working on that.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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