linux-kernel - Re: ata driver loading hang on qemu/kvm intel

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Message-ID: <56486177-b629-081e-2785-b6e2ca626e88@redhat.com>
Date:   Mon, 6 Apr 2020 10:13:03 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Suresh Gumpula <suresh.gumpula@...anix.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: ata driver loading hang on qemu/kvm intel

On 05/04/20 01:36, Suresh Gumpula wrote:
> Hi,
> 
> I am seeing this old problem with qemu 2.12/kernel 4.19.84(intel kvm
> with nesting enabled) and guest kernel 4.10
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1345964
> 
> Could you please advise me on this?  I am seeing the exact same problem
> where the ata driver load was stuck.
> 
> Really appreciate if you could give some pointers?
> 
> Is it a known issue with nesting? Or is this bug fixed in latest kvm module?

Hi, that bug was specific to running under Ravello, not on bare metal.
I have not received any other reports.

To clarify you have:

- QEMU 2.12 and kernel 4.19.x on the host

- kernel 4.10.x on the guest

What QEMU version is running in the guest and what kernel version in the
nested guest?

Paolo