linux-kernel - Re: VMs freezing when host is running 4.14

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Date:   Thu, 23 Nov 2017 18:26:36 +0200
From:   Liran Alon <LIRAN.ALON@...CLE.COM>
To:     Radim Krčmář <rkrcmar@...hat.com>
CC:     Marc Haber <mh+linux-kernel@...schlus.de>,
        LKML <linux-kernel@...r.kernel.org>,
        "KVM-ML (kvm@...r.kernel.org)" <kvm@...r.kernel.org>,
        Wanpeng Li <kernellwp@...il.com>
Subject: Re: VMs freezing when host is running 4.14



On 23/11/17 18:24, Radim Krčmář wrote:
> 2017-11-23 18:18+0200, Liran Alon:
>> On 23/11/17 17:59, Radim Krčmář wrote:
>>> Btw. there have been already many fixes from Liran Alon for that patch
>>> and your case could be the one adressed in
>>> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.spinics.net_lists_kvm_msg159158.html&d=DwIDaQ&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=Jk6Q8nNzkQ6LJ6g42qARkg6ryIDGQr-yKXPNGZbpTx0&m=206jU1rQdk3xs1DYWbQPz1gR7Iim02XOjwn458rwgIo&s=fz1JeZiSQBwqYpkmeX8OJukyC4M8BeXSuIOKwuVaeHg&e=
>>>
>>> The patch is incorrect, but you might be able to see only its benefits.
>>
>> Actually I would first attempt to check this patch of mine:
>> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.spinics.net_lists_kvm_msg159062.html&d=DwIDaQ&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=Jk6Q8nNzkQ6LJ6g42qARkg6ryIDGQr-yKXPNGZbpTx0&m=rrMFkfAUbtL2483mBNnqlNlY4qjSYBGNcZrGkRksaVQ&s=TyykS9RM7nBGxt3GgdD7Oo96RWf8ntIDptU9LJ9fQ8g&e=
>> It fixes a bug of a L2 exception accidentally being delivered into L1.
>
> Marc's guest didn't have kvm/vbox/... module loaded, so I assumed that
> we're not running L2.  Do you suspect it also fixes something else?
>
> Thanks.
>
Oh I see.
If there is no nested guest so no. My fix here probably won't help.

-Liran