Ok, turn out this seems to be an issue with legacy PCI interrupts. Nouveau wasn't really using MSI interrupts, switching them on seems to fix the stability issue. Still I would be interested in the root cause and would like to see this documented somewhere. Thanks, Lucas Am Sonntag, den 25.08.2013, 19:14 +0200 schrieb Lucas Stach: > Hi all, > > I've been experimenting with the Nouveau driver on Tegra for a few days > now and made some promising progress. The one thing that keeps throwing > me back is that I get seemingly random system lockups, which are not > recoverable. > > I think this could be the same issue that was reported by Jay Agarwal > earlier. (Message-id: > <C79B248886DD134989C8FF6B096A91AB91B603D82B@xxxxxxxxxxxxxxxxxxx>) > I also found a WAR for a system hang issue in the NVidia downstream > kernel [1], but when tried on upstream it had no effect on the issue. > > I'm reasonably sure that this is not driver software related, as I've > already hunted down most of the caching issues and acceleration seems to > work at this point. So either this is a random HW hang, or there is some > software condition I'm not aware of. > > I'm running a NV92 connected to the NVidia Beaver board. Kernel is > next-20130809 with the PCIe series + the LP2 workaround applied. > > Could you please investigate if there are any other known errata for the > Tegra PCIe controller, which could hang the entire system? > > Thanks, > Lucas > > [1] > http://nv-tegra.nvidia.com/gitweb/?p=linux-2.6.git;a=blobdiff;f=arch/arm/mach-tegra/pcie.c;h=9fab5de016cfd3cd2ebd8176da5bdbedfac73cd8;hp=44749685e2bf822665c9345aec45151b8d2447c4;hb=c5d1bcfb7249b291453a80122148155a00e5456a;hpb=704125ef90e12bc41de057001cc96d81d7cc0376 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-tegra" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
