[Bug 168298] VirtualBox using AIO on a zvol crashes

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=168298

--- Comment #41 from hjf <hjf at mailinator.com> ---
(In reply to ml from comment #40)
Thank you! This patch worked for me. I can use my VMs again

For more detail:

The Linux VMs were backed on a ZFS ZVOL. Since the upgrade to .44, I got read
errors. The sort of error Linux gives you on a bad disk. ATA timeouts, etc. The
errors were similar to: failed command: READ DMA EXT, status DRDY ERR , error
IDNF.

After applying the patch you provided, everything is working again.

The aio kernel tuning options discussed in this thread did nothing for my case.

Can we reopen this bug? This port is obviously broken for people using zvols.

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