Messages in this thread |  | | From | "H. Peter Anvin" <> | Subject | Re: Transmeta and Linux-2.4.0-test12-pre3 | Date | 1 Dec 2000 20:55:56 -0800 |
| |
Followup to: <200012020409.UAA04058@adam.yggdrasil.com> By author: "Adam J. Richter" <adam@yggdrasil.com> In newsgroup: linux.dev.kernel > > Well, alas, it appears that linux-2.4.0-test12-pre3 freezes hard > while reading the base address registers of the first PCI device > (the "host bridge"). Actually, I think the problem is some kind of > system management interrupt occuring at about this time, since the > exact point where the printk's stop gets earlier as I add more > printk's. With few printk's the printk's stop while the 6th base > address configuration register is being read; with more printk's it > stops at the second one, and it will stop in different places with > different boots, at least with the not-quite-stock kernels that I usually > use. Also, turning off interrupts during this code has no effect, so > I do not think it is directly caused by the something in the PictureBook > pepperring the processor with unexpected interrupts (I thought it might have > to do with the USB-based floppy disk). >
It's a slight bug in the Linux PCI probing code that triggers when there is ongoing DMA activity during PCI probing. Linus already have a fix for it; I expect that it will be in the next prepatch.
-hpa -- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
|  |