linux-kernel - Re: [PATCH v9 1/5] vfio/migration: Add debugfs to live migration driver

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Date:   Tue, 21 Mar 2023 10:21:40 +0800
From:   liulongfang <liulongfang@...wei.com>
To:     Jason Gunthorpe <jgg@...dia.com>,
        Alex Williamson <alex.williamson@...hat.com>
CC:     <shameerali.kolothum.thodi@...wei.com>,
        <jonathan.cameron@...wei.com>, <cohuck@...hat.com>,
        <linux-kernel@...r.kernel.org>, <linuxarm@...neuler.org>
Subject: Re: [PATCH v9 1/5] vfio/migration: Add debugfs to live migration
 driver

On 2023/3/21 5:42, Jason Gunthorpe wrote:
> On Mon, Mar 20, 2023 at 03:33:36PM -0600, Alex Williamson wrote:
> 
>> This would allow that mlx5 and future drivers automatically get this
>> with no driver code, and in fact all devices would get debugfs dev_name
>> directories for better test coverage.  hisi_acc would only need to add
>> driver specific entries after registering the device and free any
>> related data after unregistering the device.  In this way, none of the
>> entry points here would need to be exported for drivers, which is
>> perhaps the direction Jason was thinking with his prior comments.
> 
> Yes, my point was more not to add more ops specifically to wrapper
> debugfs stuff. If drivers want a special debugfs file then there is
> lots of infrastructure to just create that off a common point
> 

OK! I understand what you and Alex are asking for.
I will re-debug a version based on your request.

Thanks.
Longfang.
> Jason
> .
>