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

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Message-Id: <20f5fb20-612a-fe37-c5e1-af5ecb98f5d3@de.ibm.com>
Date:   Tue, 8 Jan 2019 09:46:04 +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 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?