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Date:      Tue, 07 Mar 2017 14:49:30 +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-cOx1a8jILL@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

martin@sugioarto.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |martin@sugioarto.com

--- Comment #7 from martin@sugioarto.com ---
Hi,

I would like to confirm that the aio sysctl settings in comment #3 fix cras=
hes
(causing SIGILL in VBoxSDL) and broken guest filesystems on
virtualbox-ose-5.1.14_2 (FreeBSD 11.0). I've tried different guest operating
systems and all fail mostly with HDD problems during initial installation.

I am using simple VDI files, by the way, not any ZVOL and no compression. My
host CPU is a bit slow (AMD  Athlon II X3 460), it is only capable to emula=
te
32-bit guests.

I've used these sysctl settings (probably still overdimensioned):

vfs.aio.max_aio_queue=3D8192
vfs.aio.max_aio_queue_per_proc=3D8192
vfs.aio.max_aio_per_proc=3D4096
vfs.aio.max_buf_aio=3D4096

Thank you.

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