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Date:      Sun, 30 Mar 2025 16:36:58 +0000
From:      bugzilla-noreply@freebsd.org
To:        virtualization@FreeBSD.org
Subject:   [Bug 285681] [Hyper-V] i386 panic during storvsc_xferbuf_prepare()
Message-ID:  <bug-285681-27103-ztEWV4xrU9@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-285681-27103@https.bugs.freebsd.org/bugzilla/>
References:  <bug-285681-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285681

--- Comment #14 from Wei Hu <weh@microsoft.com> ---
(In reply to Mark Millard from comment #12)
I see. Maybe adding followings at boot will just work for you:

console="comconsole efi vidconsole"
comconsole_speed="115200"
boot_multicons="YES"
boot_serial="YES"

These are directly copied from the FreeBSD images in Azure Marketplace. I don't
have on-prem env. Everything I tested is from VMs in Azure. Now FreeBSD works
on Gen2 Hyper-V for both amd64 and arm64.

There seems some issues on larger arm64 VMs (with more than 4 vcpus), due to
too much parallelization breaking the dependency at boot time. If you keep you
VM size under 4 vcpus, it is less likely to hit the panic mentioned in Comment
11.

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