From: Matt Mackall <mpm@selenic.com>
To: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: akpm@osdl.org, ram.gupta5@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] fix potential jiffies overflow
Date: Sat, 4 Mar 2006 19:10:44 -0600 [thread overview]
Message-ID: <20060305011044.GH7110@waste.org> (raw)
In-Reply-To: <20060303.123110.32501622.nemoto@toshiba-tops.co.jp>
On Fri, Mar 03, 2006 at 12:31:10PM +0900, Atsushi Nemoto wrote:
> >>>>> On Thu, 2 Mar 2006 18:45:02 -0800, Andrew Morton <akpm@osdl.org> said:
> sec = get_cmos_time() + clock_cmos_diff;
> - sleep_length = (get_cmos_time() - sleep_start) * HZ;
> + sleep_length = (u64)(get_cmos_time() - sleep_start) * HZ;
Calls to get_cmos_time() currently take an average of .5 seconds as it
waits for a clock edge to go by. I've got some patches queueing up to
eliminate this but it's probably worth caching the result here anyway.
--
Mathematics is the supreme nostalgia of our time.
prev parent reply other threads:[~2006-03-05 1:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-02 15:03 [PATCH] fix potential jiffies overflow Atsushi Nemoto
2006-03-02 16:43 ` Ram Gupta
2006-03-03 2:32 ` Atsushi Nemoto
2006-03-03 2:45 ` Andrew Morton
2006-03-03 3:31 ` Atsushi Nemoto
2006-03-03 3:48 ` Andrew Morton
2006-03-03 4:39 ` Atsushi Nemoto
2006-03-05 1:10 ` Matt Mackall [this message]
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