From: Jens Axboe <axboe@suse.de>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
arjanv@redhat.com, "David S. Miller" <davem@redhat.com>
Subject: Re: [patch] block highmem zero bounce v14
Date: Mon, 17 Sep 2001 00:00:12 +0200 [thread overview]
Message-ID: <20010917000012.B12270@suse.de> (raw)
In-Reply-To: <20010916234307.A12270@suse.de> <Pine.LNX.4.33.0109161447390.29507-100000@penguin.transmeta.com>
In-Reply-To: <Pine.LNX.4.33.0109161447390.29507-100000@penguin.transmeta.com>
On Sun, Sep 16 2001, Linus Torvalds wrote:
>
> On Sun, 16 Sep 2001, Jens Axboe wrote:
> >
> > It's against 2.4.10-pre9 and can be found right here:
> >
> > *.kernel.org/pub/linux/kernel/people/axboe/patches/2.4.10-pre9/block-highmem-all-14
>
> Jens, what's your feeling about the stability of these things, especially
> wrt weird drivers?
One of the very first decisions I made wrt this patch was to make sure
that weird/old drivers could keep on working exactly the way they do now
and never have to worry about highmem stuff. That basically means
enabling the stuff on a per-driver basis after it's considered safe. The
can_dma_32 for SCSI and highmem for IDE flag serves that purpose. Stand
alone block drivers just use blk_queue_bounce_limit to enable highmem
I/O after blk_init_queue, if they don't they get highmem pages bounced
as they are used too.
That leaves drivers that are 'different', stuff like ide-scsi for
instance. I think I have most of these under control...
> Ie do you think this is really a 2.4.x thing, or early 2.5.x?
Most of it is really a cautious back port of the 2.5 stuff I've been
working on, and with the above considerations it is/was meant as a 2.4
thing :-)
--
Jens Axboe
next prev parent reply other threads:[~2001-09-16 22:00 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-16 21:43 [patch] block highmem zero bounce v14 Jens Axboe
2001-09-16 21:48 ` Linus Torvalds
2001-09-16 22:00 ` Jens Axboe [this message]
2001-09-16 23:10 ` Alan Cox
2001-09-16 23:13 ` Jens Axboe
2001-09-21 15:44 ` Arjan van de Ven
2001-09-21 16:13 ` Alan Cox
2001-09-21 16:39 ` spurious interrupt with ac kernel but not with vanilla 2.4.9 Luigi Genoni
2001-09-21 17:03 ` Alan Cox
2001-09-21 17:14 ` Luigi Genoni
2001-09-21 17:28 ` Alan Cox
2001-09-21 17:33 ` Luigi Genoni
2001-09-22 14:39 ` John Levon
2001-09-22 11:00 ` [patch] block highmem zero bounce v14 Jens Axboe
2001-09-22 11:18 ` Arjan van de Ven
2001-09-22 12:11 ` Jens Axboe
2001-09-22 16:32 ` Alan Cox
2001-09-22 16:35 ` Jens Axboe
2001-09-22 16:41 ` Alan Cox
2001-09-22 16:56 ` Jens Axboe
2001-09-22 17:05 ` Arnaldo Carvalho de Melo
2001-09-20 23:43 ` David S. Miller
2001-09-21 5:56 ` Jens Axboe
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