On Tue, 2017-08-08 at 09:22 -0700, Greg KH wrote:
> 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}
{hint++}
Those commits take Steven Rostedt's hotplug stress script runtime down
from 4 _minutes_ down to 7 seconds for my RT tree, so I'm rather hoping
you hear an "ACK" too.
-Mike
