linux-kernel - Re: [PATCH v3 1/3] virtio-balloon: tweak config

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Message-Id: <8f0977ee-1cc1-56da-f4a6-641b8887648a@de.ibm.com>
Date:   Wed, 9 Jan 2019 13:07:16 +0100
From:   Christian Borntraeger <borntraeger@...ibm.com>
To:     Wei Wang <wei.w.wang@...el.com>, virtio-dev@...ts.oasis-open.org,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
        mst@...hat.com, cohuck@...hat.com
Cc:     pbonzini@...hat.com, dgilbert@...hat.com, pasic@...ux.ibm.com
Subject: Re: [PATCH v3 1/3] virtio-balloon: tweak config_changed
 implementation

On 09.01.2019 11:35, Wei Wang wrote:
> On 01/08/2019 04:46 PM, Christian Borntraeger wrote:
>>
>> On 08.01.2019 06:35, Wei Wang wrote:
>>> On 01/07/2019 09:49 PM, Christian Borntraeger wrote:
>>>> On 07.01.2019 08:01, Wei Wang wrote:
>>>>> virtio-ccw has deadlock issues with reading the config space inside the
>>>>> interrupt context, so we tweak the virtballoon_changed implementation
>>>>> by moving the config read operations into the related workqueue contexts.
>>>>> The config_read_bitmap is used as a flag to the workqueue callbacks
>>>>> about the related config fields that need to be read.
>>>>>
>>>>> The cmd_id_received is also renamed to cmd_id_received_cache, and
>>>>> the value should be obtained via virtio_balloon_cmd_id_received.
>>>>>
>>>>> Reported-by: Christian Borntraeger <borntraeger@...ibm.com>
>>>>> Signed-off-by: Wei Wang <wei.w.wang@...el.com>
>>>>> Reviewed-by: Cornelia Huck <cohuck@...hat.com>
>>>>> Reviewed-by: Halil Pasic <pasic@...ux.ibm.com>
>>>> Together with
>>>>     virtio_pci: use queue idx instead of array idx to set up the vq
>>>>     virtio: don't allocate vqs when names[i] = NULL
>>>>
>>>> Tested-by: Christian Borntraeger <borntraeger@...ibm.com>
>>> OK. I don't plan to send a new version of the above patches as no changes needed so far.
>>>
>>> Michael, if the above two patches look good to you, please help add the related tested-by
>>> and reviewed-by tags. Thanks.
>> Can we also make sure that
>>
>> virtio_pci: use queue idx instead of array idx to set up the vq
>> virtio: don't allocate vqs when names[i] = NULL
>>
>> also land in stable?
>>
> 
> You could also send the request to stable after it gets merged to Linus' tree.
> The stable review committee will decide whether to take it.
> 
> Please see Option 2:
> 
> https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
> 

Those patches are not upstream yet, Correct?

Michael,

can you add the stable tag before submitting? If not, can you give me a heads up when doing the
pull request so that I can ping the stable folks.