linux-kernel - Re: [PATCH 4/7] x86/intel_rdt: Implement scheduling support for Intel RDT

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Message-ID: <20150508085913.GC27504@twins.programming.kicks-ass.net>
Date:	Fri, 8 May 2015 10:59:13 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Vikas Shivappa <vikas.shivappa@...el.com>
Cc:	Vikas Shivappa <vikas.shivappa@...ux.intel.com>,
	linux-kernel@...r.kernel.org, x86@...nel.org, hpa@...or.com,
	tglx@...utronix.de, mingo@...nel.org, tj@...nel.org,
	matt.fleming@...el.com, will.auld@...el.com,
	peter.zijlstra@...el.com, h.peter.anvin@...el.com,
	kanaka.d.juvva@...el.com
Subject: Re: [PATCH 4/7] x86/intel_rdt: Implement scheduling support for
 Intel RDT

On Thu, May 07, 2015 at 04:15:41PM -0700, Vikas Shivappa wrote:
> >No.
> >
> >1) two arch hooks right after one another is FAIL
> >1a) just 'fix' the existing hook
> >2) current is cheap and easily obtainable without passing it as
> >   an argument
> 
> will fix to just use an existing hook in finish_task_switch and
> current(get_current) since the stack would already be changed ..
> 
> Thanks,
> Vikas
> 
> >3) why do you need the hook in the first place?
> >3a) why can't you put this in __switch_to()? This is very much x86 only
> >    code.

^ please also answer 3, why can't this go in __swtich_to()?
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