From: Jens Axboe <axboe@suse.de>
To: Daniel Phillips <phillips@bonn-fries.net>
Cc: kelley eicher <keicher@nws.gov>, J <jack@i2net.com>,
linux-kernel@vger.kernel.org
Subject: Re: 0-order allocation failed in 2.4.10-pre8
Date: Sun, 16 Sep 2001 10:03:25 +0200 [thread overview]
Message-ID: <20010916100325.B1045@suse.de> (raw)
In-Reply-To: <3BA24EB0.5000402@i2net.com> <Pine.LNX.4.33.0109141342340.14906-100000@home.nohrsc.nws.gov> <20010914210903.E806@suse.de> <20010916015917Z16125-2757+260@humbolt.nl.linux.org>
In-Reply-To: <20010916015917Z16125-2757+260@humbolt.nl.linux.org>
On Sun, Sep 16 2001, Daniel Phillips wrote:
> > Use the
> >
> > *.kernel.org/pub/linux/kernel/people/axboe/patches/2.4.9/block-highmem-all
> >
> > patch and you can use highmem without having to worry about failed
> > 0-order bounce pages allocations.
>
> Right, by using 64 bit DMA instead of bounce buffers. But aren't there cases
> where the 64 bit capable hardware isn't there but somebody still wants to use
> highmem?
Yes of course. The common case is not 64-bit dma here though, it's just
being able to DMA to highmem pages (just full 32-bit dma instead of low
memory dma). And that should cover most systems out there.
--
Jens Axboe
next prev parent reply other threads:[~2001-09-16 8:03 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-14 18:38 0-order allocation failed in 2.4.10-pre8 J
2001-09-14 18:48 ` kelley eicher
2001-09-14 19:09 ` Jens Axboe
2001-09-16 2:06 ` Daniel Phillips
2001-09-16 8:03 ` Jens Axboe [this message]
2001-09-16 9:21 ` Daniel Phillips
2001-09-16 9:24 ` Jens Axboe
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