linux-kernel - RE: Domain faults when CONFIG_CPU_SW_DOMAIN

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Message-ID: <bc5dfe76333842f8af88862826b16571@EMAIL.axentia.se>
Date:	Wed, 30 Dec 2015 16:51:37 +0000
From:	Peter Rosin <peda@...ntia.se>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	"'linux-arm-kernel@...ts.infradead.org'" 
	<linux-arm-kernel@...ts.infradead.org>,
	"nico@...xnic.net" <nico@...xnic.net>,
	Will Deacon <will.deacon@....com>,
	"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>
Subject: RE: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled

[I repeat myself just in case my last message disappeared. It would be
 a shame if 4.4 was also regressed because of a missing response.]

I wrote:
> Russell King wrote:
> > On Thu, Dec 10, 2015 at 03:29:37PM +0000, Peter Rosin wrote:
> > > Russell King wrote:
> > > > On Thu, Dec 03, 2015 at 09:37:51PM +0000, Peter Rosin wrote:
> > > > > I took both patches for a quick spin (a dozen boots and one hour 
> > > > > uptime after that for each patch) and no incidents. I have not 
> > > > > gathered data, but the crash on boot feels like it's quite a bit 
> > > > > above 50% when there is a problem so this feels good (I used 5 
> > > > > clean reboots when I bisected and that worked).
> > > > > 
> > > > > Reported-by: Peter Rosin <peda@...ntia.se>
> > > > > Tested-by: Peter Rosin <peda@...ntia.se>
> > > > > 
> > > > > (and please don't forget to cc stable)
> > > > 
> > > > I've decided to do a more in-depth fix, so that we also solve the 
> > > > issue that when we schedule in these down_read()s, we don't leak 
> > > > the permissive domain register setting into the switched-to context.
> > > > 
> > > > Can you test this patch please?  Thanks.
> > > 
> > > Still looking good.
> > 
> > Does that mean I can add your reported and tested-by to this latest patch?
> 
> Right, I thought that was obvious, sorry for the confusion.

Reported-by: Peter Rosin <peda@...ntia.se>
Tested-by: Peter Rosin <peda@...ntia.se>

(and please don't forget to cc stable)

Cheers,
Peter
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