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Date: Thu, 17 Mar 2016 07:05:12 +0200
Message-ID: <CAJ3xEMhmkpat8BS0qDn0L1ByPi9-14KUZ+5vYAt6BQfJHgOTwA@mail.gmail.com>
Subject: Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to
 4KB regardless of system page size"
From: Or Gerlitz <gerlitz.or@gmail.com>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: Eli Cohen <eli@mellanox.com>, Huy Nguyen <huyn@mellanox.com>,
        Doug Ledford <dledford@redhat.com>,
        Eugenia Emantayev <eugenia@mellanox.com>,
        Hal Rosenstock <hal.rosenstock@gmail.com>,
        Sean Hefty <sean.hefty@intel.com>, Yishai Hadas <yishaih@mellanox.com>,
        Linux Kernel <linux-kernel@vger.kernel.org>,
        "linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
        Linux Netdev List <netdev@vger.kernel.org>,
        Paul Mackerras <paulus@samba.org>, Carol L Soto <clsoto@us.ibm.com>,
        Yevgeny Petrilin <yevgenyp@mellanox.com>,
        Brian J King <bjking1@us.ibm.com>
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On Thu, Mar 17, 2016 at 3:40 AM, Alexey Kardashevskiy <aik@ozlabs.ru> wrote:
> On 03/16/2016 08:45 PM, Or Gerlitz wrote:
>> On Wed, Mar 16, 2016 at 10:34 AM, Alexey Kardashevskiy <aik@ozlabs.ru>
>> wrote:
>>
>>> Oh. ok. It also looks like even with the reverted patch, mlx4 VF does not
>>> work in a guest:
>>
>>
>> So where is the breakage point for you? does 4.4 works? if not, what?

> Ah, my bad. It is unrelated to the kernel version.
> I tried passing a PF to a guest while its VFs are already passed to another
> guest and see how exactly it blows up (AER/EEH were thrown but the host
> recovered => good) but this left the device in a weird state when I could
> not use VF in a guest anymore but it seemed to keep working on the host.

> It seems like the actual adapter does not reset completely when the machine
> is rebooted, I had unplug/replug power cables to fix this.

So to make sure, now things works fine with the patch reverted?