From: Hugh Dickins <hugh@veritas.com>
To: Dave Jones <davej@codemonkey.org.uk>
Cc: Ron Niles <Ron.Niles@falconstor.com>,
David Mosberger <davidm@hpl.hp.com>,
<linux-kernel@vger.kernel.org>
Subject: Re: Question about free_one_pgd() changes in these 3.5G patches
Date: Wed, 16 Jul 2003 19:57:38 +0100 (BST) [thread overview]
Message-ID: <Pine.LNX.4.44.0307161936210.1181-100000@localhost.localdomain> (raw)
In-Reply-To: <20030716152532.GA18350@suse.de>
On Wed, 16 Jul 2003, Dave Jones wrote:
> On Wed, Jul 16, 2003 at 01:31:39PM +0100, Hugh Dickins wrote:
>
> Both this..
> > > prefetchw(pmd+j+(PREFETCH_STRIDE/16));
> and this..
> > > prefetchw(md+(PREFETCH_STRIDE/16));
>
> both use the prefetch that was removed in 2.5 for 'being bogus'.
> It can prefetch past the end iirc, which is fatal on some CPUs.
That prefetchw never made sense to me, nor to DavidM whom I falsely
accused of it; but I had never noticed that someone (aha - you!)
got up the courage to remove it from 2.5. A 2.4.22 patch to Marcelo
would come with greater authority from you than from me, Dave.
Hugh
next prev parent reply other threads:[~2003-07-16 18:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-16 0:52 Question about free_one_pgd() changes in these 3.5G patches Ron Niles
2003-07-16 12:31 ` Hugh Dickins
2003-07-16 15:25 ` Dave Jones
2003-07-16 18:57 ` Hugh Dickins [this message]
2003-07-16 13:23 Ron Niles
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