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Date: Sun, 17 Sep 2017 10:08:28 -0700
From: Eric Biggers <ebiggers3@gmail.com>
Subject: Re: [PATCH] kvm-xfstests: use aio=native for test drives
Message-ID: <20170917170828.GA564@zzz.localdomain>
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To: Amir Goldstein <amir73il@gmail.com>
Cc: Theodore Ts'o <tytso@mit.edu>, Eryu Guan <eguan@redhat.com>, Josef Bacik <jbacik@fb.com>, fstests@vger.kernel.org
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On Mon, Sep 04, 2017 at 03:15:28PM +0300, Amir Goldstein wrote:
> Lost IOs have been observed with the default aio=threads with
> QEMU 2.5.0 when running crash consistency tests.
> The issue has not been observed with QEMU 2.9.0.
> Native AIO is probably better for our goal which is test proofing
> production systems.
> 
> Signed-off-by: Amir Goldstein <amir73il@gmail.com>

Just for reference, if you don't have CONFIG_AIO enabled in your kernel, QEMU
will segfault when passed aio=native (rather than falling back to aio=threads as
expected).  I guess that will need to be fixed as well...

Eric