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Date:      Tue, 23 Aug 2016 01:39:41 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 168298] VirtualBox using AIO on a zvol crashes
Message-ID:  <bug-168298-8-3lh1PhvRRm@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-168298-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-168298-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D168298

rkoberman@gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |rkoberman@gmail.com

--- Comment #5 from rkoberman@gmail.com ---
Just for the record, this is not ZFS related. The same issue shows up with =
VB
and UFS. I am running 11 where AIO is integrated into the kernel, so I'll t=
ry
the tuning advice and see what happens.

In my case it produced several crashes in my Window 7 client while suspendi=
ng
the VM and many hangs of the VM. Worst case was when the virtual disk requi=
red
a disk check which, in turn hung repeatedly, though eventually it did compl=
ete
and the system is running again.

Can AIO be disabled? I was looking at kern.features.aio.

virtualbox-ose-5.0.26_1
FreeBSD rogue 11.0-BETA4 FreeBSD 11.0-BETA4 #1 r303806: Sat Aug  6 18:50:50=
 PDT
2016     root@rogue:/usr/obj/usr/src/sys/GENERIC.4BSD  amd64

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