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

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Message-ID: <Pine.LNX.4.64.0701291916420.10401@blonde.wat.veritas.com>
Date:	Mon, 29 Jan 2007 19:19:24 +0000 (GMT)
From:	Hugh Dickins <hugh@...itas.com>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Andrew Morton <akpm@...l.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] mm: remove global locks from mm/highmem.c

On Mon, 29 Jan 2007, Ingo Molnar wrote:
> 
> For every 64-bit Fedora box there's more than seven 32-bit boxes. I 
> think 32-bit is going to live with us far longer than many thought, so 
> we might as well make it work better. Both HIGHMEM and HIGHPTE is the 
> default on many distro kernels, which pushes the kmap infrastructure 
> quite a bit.

But HIGHPTE uses kmap_atomic (in mainline: does -rt use kmap there?)

Hugh
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