From: Andrew Morton <akpm@osdl.org>
To: Jens Axboe <axboe@suse.de>
Cc: wli@holomorphy.com, riel@redhat.com, andrea@suse.de,
linux-kernel@vger.kernel.org, Robert_Hentosh@Dell.com,
kernel@kolivas.org
Subject: Re: [PATCH][1/2] adjust dirty threshold for lowmem-only mappings
Date: Sun, 2 Jan 2005 12:03:24 -0800 [thread overview]
Message-ID: <20050102120324.2b52a848.akpm@osdl.org> (raw)
In-Reply-To: <20050102151147.GA1930@suse.de>
Jens Axboe <axboe@suse.de> wrote:
>
> > Lifting the artificial lowmem restrictions on blockdev mappings
> > (thereby nuking mapping->gfp_mask altogether) would resolve a number of
> > problems, not that anything making that much sense could ever happen.
>
> It should be lifted for block devices, it doesn't make any sense.
Before we can permit blockdev pagecache to use highmem we must convert
every piece of code which accesses the cache to use kmap/kmap_atomic. If
you grep around for b_data you'll see there are a lot of such places.
Probably the migration could be done on a per-fs basis.
next prev parent reply other threads:[~2005-01-02 20:03 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-20 15:15 Rik van Riel
2004-12-20 15:23 ` Rik van Riel
2004-12-20 20:54 ` Andrew Morton
2004-12-20 21:27 ` Rik van Riel
2004-12-23 19:21 ` Rik van Riel
2004-12-24 16:01 ` Andrea Arcangeli
2004-12-24 16:22 ` Rik van Riel
2004-12-24 16:40 ` Andrea Arcangeli
2004-12-24 22:12 ` Rik van Riel
2004-12-25 2:07 ` Andrea Arcangeli
2004-12-25 17:59 ` Rik van Riel
2004-12-25 18:36 ` Andrea Arcangeli
2004-12-25 19:07 ` William Lee Irwin III
2004-12-25 20:03 ` Andrea Arcangeli
2004-12-26 3:07 ` William Lee Irwin III
2005-01-02 16:10 ` Andrea Arcangeli
2005-01-02 16:36 ` William Lee Irwin III
2005-01-02 16:53 ` Rik van Riel
2005-01-02 17:21 ` Andrea Arcangeli
2004-12-25 22:03 ` Nikita Danilov
2004-12-26 3:16 ` William Lee Irwin III
2005-01-02 15:11 ` Jens Axboe
2005-01-02 16:18 ` Andrea Arcangeli
2005-01-02 20:03 ` Andrew Morton [this message]
2005-01-02 20:25 ` William Lee Irwin III
2004-12-20 16:46 Robert_Hentosh
2004-12-20 17:56 ` Sami Farin
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