From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Tokarev <mjt@tls.msk.ru>
Subject: JFYI: ext4 bug triggerable by kvm
Date: Mon, 16 Aug 2010 18:00:35 +0400
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Cc: Kevin Wolf <kwolf@redhat.com>
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https://bugzilla.kernel.org/show_bug.cgi?id=16165

When a (raw) guest image is placed on an ext4 filesystem,
it is possible to get data corruption, now due to ext4
bug, not kvm bug.

Also, ext4 is _very_ slow on O_SYNC writes (which is
used in kvm with default cache).

JFYI.

/mjt