On Wed, Feb 22, 2012 at 09:49:59PM -0000, Avleen Vig wrote: > Version 0.12.2 - I know this isn't the latest but I looked through the > changelogs and couldn't find any references to this being fixed. > > This is related to issues that many apps have, and is described in more > detail here: > http://oss.sgi.com/archives/xfs/2010-07/msg00163.html > and: > https://bugs.launchpad.net/percona-xtrabackup/+bug/606981 > > When using both direct io and buffered io on the same file, you can cause > corruption on the filesystem and other issues. > XFS out right hangs, but the problem exists on ext3 and other filesystems > which silently carry on. > > **this is a data corruption issue**. > > This is the full stack trace we got from a recent hang:
I only see qemu-kvm in the backtrace. QEMU normally only access the image file either with or without O_DIRECT - not both at the same time. Were you running another program that accesses the image file at the same time? Stefan
