From: Kiran <geekazoid@phreaker.net>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: linux-kernel@vger.kernel.org, torvalds@transmeta.com
Subject: Re: Patch 2.5.25: Ensure xtime_lock and timerlist_lock are on difft cachelines
Date: Fri, 26 Jul 2002 14:53:44 +0530 [thread overview]
Message-ID: <20020726145344.A18568@phreaker.net> (raw)
In-Reply-To: <20020726080211.3E71E4824@lists.samba.org>; from rusty@rustcorp.com.au on Fri, Jul 26, 2002 at 05:56:19PM +1000
On Fri, Jul 26, 2002 at 05:56:19PM +1000, Rusty Russell wrote:
> In message <20020726125605.A2822@phreaker.net> you write:
> > This patch was not meant to be a definitive fix for do_gettimeofday.
> > I thought having diffrent locks on the same cacheline was bad. Atleast,
> > I don't think there'd be any negative performance impact due to my patch.
> > Pls correct me if I am wrong.
>
> Did you ever wonder why we don't declare spinlock to be ____cacheline_aligned?
Yep...and for long enough...(I think..)..or there'd have been an RFC
or a stupid question to lkml sometime from me :)
> While it's probably justified in this case, you pay for it in a slight
> increase in size...
>
I thought you were of the opinion that "memory is cheap" ;-)
-Kiran
next prev parent reply other threads:[~2002-07-26 9:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-25 15:15 Patch 2.5.25: Ensure xtime_lock and timerlist_lock are on difft cachelines Ravikiran G Thirumalai
2002-07-26 6:24 ` Rusty Russell
2002-07-26 7:26 ` Kiran
2002-07-26 7:56 ` Rusty Russell
2002-07-26 9:23 ` Kiran [this message]
2002-07-27 4:17 ` Rusty Russell
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