linux-kernel - Re: [PATCH v6 1/5] powerpc/85xx: implement hardware timebase sync

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Message-ID: <1340748603.3732.26.camel@pasglop>
Date:	Wed, 27 Jun 2012 08:10:03 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Scott Wood <scottwood@...escale.com>
Cc:	Kumar Gala <galak@...nel.crashing.org>,
	linuxppc-dev@...ts.ozlabs.org,
	Zhao Chenhui <chenhui.zhao@...escale.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 1/5] powerpc/85xx: implement hardware timebase sync

On Tue, 2012-06-26 at 16:45 -0500, Scott Wood wrote:

> Some parts are due to corenet versus non-corenet, such as the actual
> register you write to to disable/enable the timebase.
> 
> There's also a two-core assumption in the synchronization code which
> I've complained about multiple times -- although on closer inspection it
> looks like this is done under cpu_add_remove_lock, and we can assume
> that there's only one core at a time in take_timebase(), regardless of
> how many cores are in the system.

Right, it should work fine with any number of cores or am I missing
something ? (btw, since when complaining about something helps ? :-)

Cheers,
Ben.


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