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Subject: Re: Voyager subarchitecture for 2.5.46
From: john stultz <johnstul@us.ibm.com>
To: "J.E.J. Bottomley" <James.Bottomley@steeleye.com>
Cc: Vojtech Pavlik <vojtech@suse.cz>, Linus Torvalds <torvalds@transmeta.com>,
       Pavel Machek <pavel@ucw.cz>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
       "J.E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
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On Mon, 2002-11-11 at 12:57, J.E.J. Bottomley wrote:
> As a beginning, what about the attached patch?  It eliminates the compile time 
> TSC options (and thus hopefully the sources of confusion).  I've exported 
> tsc_disable, so it can be set by the subarchs if desired (voyager does this) 
> and moved the notsc option into the timer_tsc code (which is where it looks 
> like it belongs).

Looks good to me.

We'd still need to go back and yank out the #ifdef CONFIG_X86_TSC'ed 
macros in profile.h and pksched.h or replace them w/ inlines that wrap
the rdtsc calls w/ if(cpu_has_tsc && !tsc_disable) or some such line. 

But yea, its a start, assuming no one screams about not being able to
optimize out the timer_pit code.

thanks
-john

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