From: Jens Axboe <axboe@suse.de>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Ross Biro <rossb@google.com>
Cc: linux-kernel@vger.kernel.org, alan@redhat.com
Subject: Re: 2.4.21-pre3 kernel crash
Date: Mon, 27 Jan 2003 20:25:28 +0100 [thread overview]
Message-ID: <20030127192528.GF889@suse.de> (raw)
In-Reply-To: <1043694192.2756.55.camel@zion.wanadoo.fr>
On Mon, Jan 27 2003, Benjamin Herrenschmidt wrote:
> On Mon, 2003-01-27 at 17:53, Ross Biro wrote:
> > This looks like the same problem I ran into with IDE and highmem not
> > getting along. Try compiling your kernel with out highmem enabled and
> > see what happenes.
>
> Indeed, looking at the code, it seems ide_build_sglist() doesn't worry
> much about highmem, just picks bh->b_data, assume it's a virtual
> address, and gives that to pci_map_sg(). I beleive, at least for highmem
> pages, it should rather pick bh->b_page and bh_offset(bh)
Exactly, just take a look at 2.4.20.
> I can hack something, maybe tonight, but I can't test HIGHMEM for a while
> here. Interestingly, I had no problem report on PPC from users using IDE
> with highmem though.
Then noone is using highmem on ppc with 2.4.21-pre yet, it will
definitely barf on the very first highmem bh->b_page
--
Jens Axboe
next prev parent reply other threads:[~2003-01-27 19:16 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-27 15:41 2.4.21-pre3 kernel crash Martin MOKREJŠ
2003-01-27 16:53 ` Ross Biro
2003-01-27 17:13 ` Martin MOKREJŠ
2003-01-27 19:23 ` Jens Axboe
2003-01-27 20:27 ` Edward Tandi
2003-01-27 20:36 ` Jeff Garzik
2003-01-27 20:47 ` Edward Tandi
2003-01-27 20:57 ` Jeff Garzik
2003-01-28 9:08 ` Alan Cox
2003-01-28 10:50 ` Martin MOKREJŠ
2003-01-27 23:18 ` J.A. Magallon
2003-01-27 23:24 ` Jens Axboe
2003-01-28 0:02 ` J.A. Magallon
2003-01-27 19:03 ` Benjamin Herrenschmidt
2003-01-27 19:21 ` Benjamin Herrenschmidt
2003-01-27 19:25 ` Jens Axboe [this message]
2003-01-27 19:45 ` Alan Cox
2003-01-27 19:49 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2003-01-28 16:41 Larry Sendlosky
2003-01-28 22:06 ` Jens Axboe
2003-01-29 8:23 ` Benjamin Herrenschmidt
2003-01-29 8:53 ` Jens Axboe
2003-01-29 9:44 ` Benjamin Herrenschmidt
2003-01-29 10:16 ` Jens Axboe
2003-01-29 8:23 Benjamin Herrenschmidt
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