linux-kernel - Re: [PATCH 3/3] pvclock: Add a new wrapper function to only get variable flags

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Date:	Sat, 28 May 2016 20:02:59 +0800
From:	Minfei Huang <mnghuan@...il.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	Andy Lutomirski <luto@...capital.net>,
	Borislav Petkov <bp@...e.de>,
	Andrew Lutomirski <luto@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>, X86 ML <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] pvclock: Add a new wrapper function to only get
 variable flags

On 05/27/16 at 06:06P, Paolo Bonzini wrote:
> 
> 
> On 27/05/2016 17:40, Andy Lutomirski wrote:
> > On Thu, May 26, 2016 at 11:17 PM, Minfei Huang <mnghuan@...il.com> wrote:
> >> There is a generic function __pvclock_read_cycles to be used to get both
> >> flags and cycles. For function pvclock_read_flags, it's useless to get
> >> cycles value. To make this function be more effective, add a new wrapper
> >> function to only get variable flags.
> > 
> > Why not just get rid of this function entirely?
> 
> I agree.  If you want to abstract the retry logic, perhaps you can add

Hmm, I will get rid of pvclock_read_flags, and repost it.

Thanks
Minfei

> pvclock_read_{begin,retry} functions like seqlock_read_{begin,retry}?
> 
> Thanks,
> 
> Paolo