linux-kernel - Re: x86: Clean up computation of HPET .mult variables

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Message-ID: <20080507071334.GG32195@elte.hu>
Date:	Wed, 7 May 2008 09:13:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Daniel Walker <dwalker@...sta.com>, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, venkatesh.pallipadi@...el.com,
	"Carlos R. Mafra" <crmafra2@...il.com>
Subject: Re: x86: Clean up computation of HPET .mult variables


* Carlos R. Mafra <crmafra2@...il.com> wrote:

> PS: I also computed the "exact" value for hpet_clockevent.mult
> by hand and got 
> 
> hpet_clockevent.mult = 61496114.58 (exact)
> hpet_clockevent.mult = 61496114    (my patch)
> hpet_clockevent.mult = 61496110    (original)
> 
> so my patch in fact improves the accuracy (due to the fact that it 
> removes the extra do_div() to compute the frequency, which originaly 
> did not have the rounding trick.)

that's reassuring, thanks Carlos - patch is still queued up in x86.git. 
(with a v2.6.27-ish merge target, provided it all goes well.)

	Ingo
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