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Re: [PATCH] arm64: enable generic idle loop

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  Re: [PATCH] arm64: enable generic idle loop Leo Yan <leo.yan@linaro.org> - 2015-09-15 13:30 +0200
    Re: [PATCH] arm64: enable generic idle loop Catalin Marinas <catalin.marinas@arm.com> - 2015-09-15 16:40 +0200
      Re: [PATCH] arm64: enable generic idle loop Will Deacon <will.deacon@arm.com> - 2015-09-15 16:50 +0200
        Re: [PATCH] arm64: enable generic idle loop Leo Yan <leo.yan@linaro.org> - 2015-09-15 17:00 +0200

#1225008 — Re: [PATCH] arm64: enable generic idle loop

Hi Will,

On Fri, Aug 21, 2015 at 04:54:25PM +0100, Catalin Marinas wrote:
> On Fri, Aug 21, 2015 at 05:14:46PM +0800, Leo Yan wrote:
> > On Fri, Aug 21, 2015 at 10:00:43AM +0100, Catalin Marinas wrote:
> > > On Fri, Aug 21, 2015 at 11:40:22AM +0800, Leo Yan wrote:
> > > > Enable generic idle loop for ARM64, so can support for hlt/nohlt
> > > > command line options to override default idle loop behavior.
> > > 
> > > Just curious, what do you need this for?
> > 
> > With this config, usually we can add "nohlt" in command line to force
> > the cpu will never be powered off; so can quickly narrow down if some
> > issues are related with cpuidle or not.
> > 
> > And if CPU is powered off, then its debug logic also will be powered off.
> > So we can simply use this method to let debugger always hot connect with
> > the target CPU.
> 
> OK.
> 
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>

Suppose you have missed this patch at previous merge window,
so just for reminding.

Thanks,
Leo Yan
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#1225213

On Tue, Sep 15, 2015 at 07:20:08PM +0800, Leo Yan wrote:
> On Fri, Aug 21, 2015 at 04:54:25PM +0100, Catalin Marinas wrote:
> > On Fri, Aug 21, 2015 at 05:14:46PM +0800, Leo Yan wrote:
> > > On Fri, Aug 21, 2015 at 10:00:43AM +0100, Catalin Marinas wrote:
> > > > On Fri, Aug 21, 2015 at 11:40:22AM +0800, Leo Yan wrote:
> > > > > Enable generic idle loop for ARM64, so can support for hlt/nohlt
> > > > > command line options to override default idle loop behavior.
> > > > 
> > > > Just curious, what do you need this for?
> > > 
> > > With this config, usually we can add "nohlt" in command line to force
> > > the cpu will never be powered off; so can quickly narrow down if some
> > > issues are related with cpuidle or not.
> > > 
> > > And if CPU is powered off, then its debug logic also will be powered off.
> > > So we can simply use this method to let debugger always hot connect with
> > > the target CPU.
> > 
> > OK.
> > 
> > Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> 
> Suppose you have missed this patch at previous merge window,
> so just for reminding.

It looks like it missed the merging window. Will, can this still be
picked for 4.3? If not, it will be 4.4.

-- 
Catalin
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#1225251

On Tue, Sep 15, 2015 at 03:31:35PM +0100, Catalin Marinas wrote:
> On Tue, Sep 15, 2015 at 07:20:08PM +0800, Leo Yan wrote:
> > On Fri, Aug 21, 2015 at 04:54:25PM +0100, Catalin Marinas wrote:
> > > On Fri, Aug 21, 2015 at 05:14:46PM +0800, Leo Yan wrote:
> > > > On Fri, Aug 21, 2015 at 10:00:43AM +0100, Catalin Marinas wrote:
> > > > > On Fri, Aug 21, 2015 at 11:40:22AM +0800, Leo Yan wrote:
> > > > > > Enable generic idle loop for ARM64, so can support for hlt/nohlt
> > > > > > command line options to override default idle loop behavior.
> > > > > 
> > > > > Just curious, what do you need this for?
> > > > 
> > > > With this config, usually we can add "nohlt" in command line to force
> > > > the cpu will never be powered off; so can quickly narrow down if some
> > > > issues are related with cpuidle or not.
> > > > 
> > > > And if CPU is powered off, then its debug logic also will be powered off.
> > > > So we can simply use this method to let debugger always hot connect with
> > > > the target CPU.
> > > 
> > > OK.
> > > 
> > > Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> > 
> > Suppose you have missed this patch at previous merge window,
> > so just for reminding.
> 
> It looks like it missed the merging window. Will, can this still be
> picked for 4.3? If not, it will be 4.4.

Yeah, it's harmless enough to pick up with the current crop of fixes.
Sorry I missed it.

Will
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#1225269

On Tue, Sep 15, 2015 at 03:44:09PM +0100, Will Deacon wrote:
> On Tue, Sep 15, 2015 at 03:31:35PM +0100, Catalin Marinas wrote:
> > On Tue, Sep 15, 2015 at 07:20:08PM +0800, Leo Yan wrote:
> > > On Fri, Aug 21, 2015 at 04:54:25PM +0100, Catalin Marinas wrote:
> > > > On Fri, Aug 21, 2015 at 05:14:46PM +0800, Leo Yan wrote:
> > > > > On Fri, Aug 21, 2015 at 10:00:43AM +0100, Catalin Marinas wrote:
> > > > > > On Fri, Aug 21, 2015 at 11:40:22AM +0800, Leo Yan wrote:
> > > > > > > Enable generic idle loop for ARM64, so can support for hlt/nohlt
> > > > > > > command line options to override default idle loop behavior.
> > > > > > 
> > > > > > Just curious, what do you need this for?
> > > > > 
> > > > > With this config, usually we can add "nohlt" in command line to force
> > > > > the cpu will never be powered off; so can quickly narrow down if some
> > > > > issues are related with cpuidle or not.
> > > > > 
> > > > > And if CPU is powered off, then its debug logic also will be powered off.
> > > > > So we can simply use this method to let debugger always hot connect with
> > > > > the target CPU.
> > > > 
> > > > OK.
> > > > 
> > > > Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> > > 
> > > Suppose you have missed this patch at previous merge window,
> > > so just for reminding.
> > 
> > It looks like it missed the merging window. Will, can this still be
> > picked for 4.3? If not, it will be 4.4.
> 
> Yeah, it's harmless enough to pick up with the current crop of fixes.
> Sorry I missed it.

It's fine and thanks :)
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