On Mon, Aug 26, 2013 at 01:50:34AM +0200, Lucas Stach wrote: > 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. Hi Lucas, Thanks for reporting. It's quite possible that there is a general issue with legacy interrupts since I haven't tested that much. I'll see if I can reproduce the lockups when using legacy interrupts on any of my setups. Thanks, Thierry > > 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 > >
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