linux-kernel - Re: blk-mq breaks suspend even with runtime PM patch

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Date:   Tue, 8 Aug 2017 12:35:07 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Mike Galbraith <efault@....de>,
        Greg KH <gregkh@...uxfoundation.org>
Cc:     Oleksandr Natalenko <oleksandr@...alenko.name>,
        Christoph Hellwig <hch@....de>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: blk-mq breaks suspend even with runtime PM patch

On 08/08/2017 12:33 PM, Mike Galbraith wrote:
> On Tue, 2017-08-08 at 18:50 +0200, Mike Galbraith wrote:
>> On Tue, 2017-08-08 at 09:44 -0700, Greg KH wrote:
>>>
>>> Should these go back farther than 4.12?  Looks like they apply cleanly
>>> to 4.9, didn't look older than that...
>>
>> I met prerequisites at 4.11...
> 
> FWIW, I took/modified 2d0364c8c1a9.  Dunno if the suspend regression
> exists in 4.11 though, without which you'll likely want nothing.

It does exist, the only change here is that we default people to
scsi-mq in 4.12+. Honestly, nobody complained since we've had scsi-mq,
so I could pivot both ways on whether we really need the changes in
earlier versions or not.

-- 
Jens Axboe