Messages in this thread | | | Date | Mon, 27 Jan 2003 20:25:28 +0100 | From | Jens Axboe <> | Subject | Re: 2.4.21-pre3 kernel crash |
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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
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