linux-kernel - Re: [PATCH 1/2] non-string based tsc unstable reasons

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Message-Id: <1178997048.27889.13.camel@imap.mvista.com>
Date:	Sat, 12 May 2007 12:10:48 -0700
From:	Daniel Walker <dwalker@...sta.com>
To:	Andi Kleen <ak@...e.de>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	johnstul@...ibm.com, mingo@...e.hu
Subject: Re: [PATCH 1/2] non-string based tsc unstable reasons

On Sat, 2007-05-12 at 20:56 +0200, Andi Kleen wrote:
> On Saturday 12 May 2007 17:43:45 Daniel Walker wrote:
> > Just passing a string to mark_tsc_unstable() doesn't allow real code to change
> > based on the reason for the instablility. I changed mark_tsc_unstable()
> > to accept a string and a flag which denotes a general reason why the tsc
> > is unstable, and can be evaluated in code.
> > 
> > This is based off John Stultz patch to add the string reasons.
> 
> This seems ugly -- it would be better to just do whatever needs to
> be doing in the caller instead of passing down a enum and then switch.
> 
> And why do you really need it anyways?

Sending the string in mark_tsc_unstable() is already in linus-git
AFAIK .. The enum is just to allow sched_clock to switch off the TSC in
some situations, and not all.. 

Daniel

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