From: Andrew Morton <akpm@zip.com.au>
To: Hugh Dickins <hugh@veritas.com>
Cc: Andrea Arcangeli <andrea@suse.de>,
rwhron@earthlink.net, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] 1-2-3 GB
Date: Sat, 12 Jan 2002 13:02:57 -0800 [thread overview]
Message-ID: <3C40A481.51306926@zip.com.au> (raw)
In-Reply-To: <20020112125625.E1482@inspiron.school.suse.de> <Pine.LNX.4.21.0201121825200.1105-100000@localhost.localdomain>
Hugh Dickins wrote:
> ...
> The patch below seems to be enough to convince egcs-2.91.66 and
> gcc-2.95.3 to use a "jb" comparison there.
> ...
> - for (j = 0; j < PTRS_PER_PMD ; j++) {
> - prefetchw(pmd+j+(PREFETCH_STRIDE/16));
> - free_one_pmd(pmd+j);
> + for (md = pmd, emd = pmd + PTRS_PER_PMD; md < emd; md++) {
> + prefetchw(md+(PREFETCH_STRIDE/16));
> + free_one_pmd(md);
You need to add a big fat comment here, describing the compiler
problem, and the risks which attend any change to this code.
-
next prev parent reply other threads:[~2002-01-12 21:09 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-12 5:45 [PATCH] 1-2-3 GB rwhron
2002-01-12 7:32 ` H. Peter Anvin
2002-01-12 13:17 ` Andrea Arcangeli
2002-01-12 17:26 ` Albert D. Cahalan
2002-01-12 17:42 ` Andrea Arcangeli
2002-01-12 18:28 ` Albert D. Cahalan
2002-01-12 19:07 ` BIO Usage Error or Conflicting Designs Andre Hedrick
2002-01-12 20:05 ` Jens Axboe
2002-01-13 1:15 ` Andre Hedrick
2002-01-13 12:59 ` Jens Axboe
2002-01-13 19:59 ` Andre Hedrick
2002-01-14 6:42 ` Jens Axboe
2002-01-12 20:59 ` [PATCH] 1-2-3 GB H. Peter Anvin
2002-01-12 11:56 ` Andrea Arcangeli
2002-01-12 15:50 ` rwhron
2002-01-12 19:22 ` Hugh Dickins
2002-01-12 21:02 ` Andrew Morton [this message]
2002-01-13 20:24 ` H. Peter Anvin
2002-01-13 23:11 ` Marvin Justice
2002-01-14 0:03 ` H. Peter Anvin
2002-01-14 0:46 ` Alan Cox
2002-01-14 2:21 ` Rik van Riel
2002-01-18 21:18 ` Pavel Machek
2002-01-19 0:24 ` Hugh Dickins
2002-01-12 21:41 ` rwhron
2002-01-12 22:34 ` rwhron
-- strict thread matches above, loose matches on Subject: below --
2002-01-15 14:07 rwhron
2002-01-15 17:48 ` Dave Jones
2002-01-16 2:12 ` H. Peter Anvin
2002-01-23 3:53 ` rwhron
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