linux-kernel - Re: [PATCH resend4 2/3] itimers: fix periodic tics precision

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Message-ID: <alpine.LFD.2.00.0905251423490.3582@localhost.localdomain>
Date:	Mon, 25 May 2009 14:32:14 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Stanislaw Gruszka <sgruszka@...hat.com>
cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linuxppc-dev@...abs.org
Subject: Re: [PATCH resend4 2/3] itimers: fix periodic tics precision

On Mon, 25 May 2009, Stanislaw Gruszka wrote:
> @@ -904,6 +905,7 @@ void __init time_init(void)
>  	tb_ticks_per_usec = ppc_tb_freq / 1000000;
>  	tb_to_us = mulhwu_scale_factor(ppc_tb_freq, 1000000);
>  	calc_cputime_factors();
> +	cputime_one = jiffies_to_cputime(1);

  1) The variable name is misleading.

  2) The patch breaks all powerpc platforms which have
  CONFIG_VIRT_CPU_ACCOUNTING=n and ia64 with
  CONFIG_VIRT_CPU_ACCOUNTING=y

Thanks,

	tglx
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