From: Jeff Garzik <jgarzik@pobox.com>
To: "Martin J. Bligh" <mbligh@aracnet.com>, Andrew Morton <akpm@osdl.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org,
Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>,
"Randy.Dunlap" <rddunlap@osdl.org>,
William Lee Irwin III <wli@holomorphy.com>,
Jens Axboe <axboe@suse.de>
Subject: [PATCH] Re: news about IDE PIO HIGHMEM bug (was: Re: 2.6.9-mm1)
Date: Wed, 27 Oct 2004 12:35:26 -0400 [thread overview]
Message-ID: <417FCE4E.4080605@pobox.com> (raw)
In-Reply-To: <1246750000.1098892883@[10.10.2.4]>
[-- Attachment #1: Type: text/plain, Size: 494 bytes --]
Martin J. Bligh wrote:
> To repeat what I said in IRC ... ;-)
>
> Actually, you could check this with the pfns being the same when >> MAX_ORDER-1.
> We should be aligned on a MAX_ORDER boundary, I think.
>
> However, pfn_to_page(page_to_pfn(page) + 1) might be safer. If rather slower.
Is this patch acceptable to everyone? Andrew?
It uses the publicly-exported pfn_to_page/page_to_pfn abstraction, which
seems to be the only way to accomplish what we want to do in IDE/libata.
Jeff
[-- Attachment #2: patch --]
[-- Type: text/plain, Size: 401 bytes --]
===== include/linux/mm.h 1.193 vs edited =====
--- 1.193/include/linux/mm.h 2004-10-20 04:37:06 -04:00
+++ edited/include/linux/mm.h 2004-10-27 12:33:28 -04:00
@@ -41,6 +41,8 @@
#define MM_VM_SIZE(mm) TASK_SIZE
#endif
+#define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + n)
+
/*
* Linux kernel virtual memory manager primitives.
* The idea being to have a "virtual" mm in the same way
next prev parent reply other threads:[~2004-10-27 16:42 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <58cb370e041027074676750027@mail.gmail.com>
2004-10-27 15:14 ` news about IDE PIO HIGHMEM bug (was: Re: 2.6.9-mm1) Jeff Garzik
2004-10-27 15:14 ` Jeff Garzik
2004-10-27 15:52 ` Martin J. Bligh
2004-10-27 15:52 ` Martin J. Bligh
2004-10-27 15:59 ` Jeff Garzik
2004-10-27 15:59 ` Jeff Garzik
2004-10-27 17:36 ` Martin J. Bligh
2004-10-27 17:36 ` Martin J. Bligh
2004-10-27 16:01 ` Martin J. Bligh
2004-10-27 16:01 ` Martin J. Bligh
2004-10-27 16:35 ` Jeff Garzik [this message]
2004-10-27 21:29 ` [PATCH] " Andrew Morton
2004-10-27 21:29 ` Andrew Morton
2004-10-27 21:31 ` Jeff Garzik
2004-10-27 21:31 ` Jeff Garzik
2004-10-27 21:34 ` William Lee Irwin III
2004-10-27 21:34 ` William Lee Irwin III
2004-10-27 18:08 ` Christoph Hellwig
2004-10-27 18:08 ` Christoph Hellwig
2004-10-27 18:33 ` news about IDE PIO HIGHMEM bug Jeff Garzik
2004-10-27 18:33 ` Jeff Garzik
2004-10-27 18:48 ` William Lee Irwin III
2004-10-27 18:48 ` William Lee Irwin III
2004-10-28 0:18 ` William Lee Irwin III
2004-10-28 0:18 ` William Lee Irwin III
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