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

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Date:   Tue, 8 Aug 2017 09:22:52 -0700
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Oleksandr Natalenko <oleksandr@...alenko.name>
Cc:     Mike Galbraith <efault@....de>, Jens Axboe <axboe@...nel.dk>,
        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 Sun, Jul 30, 2017 at 03:50:15PM +0200, Oleksandr Natalenko wrote:
> Hello Mike et al.
> 
> On neděle 30. července 2017 7:12:31 CEST Mike Galbraith wrote:
> > FWIW, first thing I'd do is update that 4.12.0 to 4.12.4, and see if
> > stable fixed it.
> 
> My build already includes v4.12.4.
> 
> > If not, I'd find these two commits irresistible.
> > 
> > 5f042e7cbd9eb blk-mq: Include all present CPUs in the default queue mapping
> > 4b855ad37194f blk-mq: Create hctx for each present CPU
> 
> I've applied these 2 commits, and cannot reproduce the issue anymore. Looks 
> like a perfect hit, thanks!
> 
> > 'course applying random upstream bits does come with some risk, trying
> > a kernel already containing them has less "entertainment" potential. 
> 
> Should you consider applying them to v4.12.x stable series? CC'ing Greg just 
> in case.

I can queue these up if I get an ack from the developers/maintainers
that it is ok to do so...

{hint}

thanks,

greg k-h