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Date: Fri, 17 Aug 2001 01:35:52 +0200
From: Andrea Arcangeli <andrea@suse.de>
To: Ben LaHaise <bcrl@redhat.com>
Cc: Mark Hemment <markhe@veritas.com>, Linus Torvalds <torvalds@transmeta.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Align VM locks
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In-Reply-To: <Pine.LNX.4.33.0108161625160.5368-100000@touchme.toronto.redhat.com>; from bcrl@redhat.com on Thu, Aug 16, 2001 at 04:27:11PM -0400
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On Thu, Aug 16, 2001 at 04:27:11PM -0400, Ben LaHaise wrote:
> Here's the patch I sent a few days ago that provides a couple of generic
> kmap_atomic entries for exactly this purpose and uses them for page cache
> access.  Not only does it avoid unneeded shootdowns, but it means that
> spurious schedules won't happen under extreme loads.

if you want to take this route you don't need to define KM_USER*, just
rename KM_BOUNCE_WRITE to KM_KERNEL and use it always.

Andrea