linux-kernel - Re: [PATCH -mm] fix jiffies clocksource inittime

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Date:	Wed, 04 Apr 2007 22:46:29 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	john stultz <johnstul@...ibm.com>,
	lkml <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Andi Kleen <ak@....de>
Subject: Re: [PATCH -mm] fix jiffies clocksource inittime

On Wed, 2007-04-04 at 13:43 -0700, Andrew Morton wrote:
> >  
> > -module_init(init_jiffies_clocksource);
> > +core_initcall(init_jiffies_clocksource);
> 
> Do you think this is needed in 2.6.21?

Yes, please.

> If so: worrisome.  Startup ordering issues are fragile and tricky.  Time
> management is fragile and tricky.  The combination of the two doesn't get
> any better ;)
> 
> An option would be to test it in 2.6.22-rcX for a while, then backport to
> 2.6.21.x.

The jiffies clocksource is completely uncritical and it's less worrisome
than having the TSC early as the time reference.

	tglx


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