On Wed, Oct 22, 2008 at 7:46 AM, Felipe Contreras <felipe.contreras@xxxxxxxxx> wrote: > I've reverted the strongly ordered patch and I'm not getting any IRQ > issues with any DSP tests, including the ping one. > > I'm using the latest patches from Hiroshi (20081021), so maybe that > has something to do with it? I've also reverted the strongly ordered patch. While I can't do anything that freezes the kernel anymore, I can still cause two kinds of endless interrupts on Angstrom: 1) About 1 in 10 boots generates these messages endlessly: __ratelimit: 1518265 callbacks suppressed omapfb omapfb: irq error status 4000 omapfb omapfb: irq error status 4022 Tony sent me some debug code which shows the register values when this occurs: XXX 95mask: 0xffffffdf 95 0x3ffffff XXX 95ack: 0xffffffdf 95 0x3ffffff This can be triggered even without the DSP patches. Before Tony's latest work, this would just spiral out into irq -33s and kill the kernel. Now it just slows things down, which is a good improvement. I can't reproduce this with the S-O patch. 2) I still get spurious interrupts while running the DSP ping.out test, but they are also handled better. No slow down occurs. However, I can get endless interrupts by unplugging/replugging my USB hub. Again, the endless interrupts slow things down a lot, but no longer kill the system like before. I can't reproduce this with the S-O patch. Let me know if there are further patches worth testing without S-O. For now, I'm back to S-O to allow me to keep working. - Nathan -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
