On Thu, Oct 23, 2008 at 12:30 AM, Nathan Monson <nmonson@xxxxxxxxx> wrote: > 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. Which DSP patches are you using? I haven't been able to reproduce this with Tony's irq mask patch, latest DSP patches, and removing S-O patch. -- Felipe Contreras -- 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
