linux-kernel - Re: [PATCH] mm: remove global locks from mm/highmem.c

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Date:	Sun, 28 Jan 2007 15:28:58 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Andrew Morton <akpm@...l.org>
Subject: Re: [PATCH] mm: remove global locks from mm/highmem.c

On Sun, Jan 28, 2007 at 04:17:00PM +0100, Ingo Molnar wrote:
> scalability. I did lock profiling on the -rt kernel, which exposes such 
> things nicely. Half of the lock contention events during kernel compile 
> were due to kmap(). (The system had 2 GB of RAM, so 40% lowmem, 60% 
> highmem.)

Numbers please, and not on -rt but on mainline.  Please show the profiles.

> ps. please fix your mailer to not emit Mail-Followup-To headers. In Mutt
>     you can do this via "set followup_to=no" in your .muttrc.

I have told you last time that this is absolutely intentional and I won't
change it.
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