linux-kernel - Re: [PATCH] 2.6.18-rt7: fix more issues with 32-bit cycles_t in latency

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Message-ID: <45746338.7050903@ru.mvista.com>
Date:	Mon, 04 Dec 2006 21:04:40 +0300
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	dwalker@...sta.com
Subject: Re: [PATCH] 2.6.18-rt7: fix more issues with 32-bit cycles_t	in	latency_trace.c
 (take 3)

Hello.

Sergei Shtylyov wrote:

>>Why is cycles_t 32-bits on some 
>>of the arches to begin with?

>     I guess this was done for speed reasons.

    The whole 64-bit timebase can't be rad atomically on PPC32. ARM probably 
has stricter limitations...

>>	Ingo

WBR, Sergei
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