On Mon, 2010-11-22 at 03:01 -0700, Gary Thomas wrote: > I have a bit more information on this. I'm pretty sure that the failures > are only happening in my SCSI (SATA actually) code. My board (8347ea) has > a PCI bus with a SIL SATA controller. This combo works perfectly in 2.6.28. > In 2.6.32, it will run for a while (possibly quite a while), then timeout > trying to do a large block write - typically 256 blocks. Once this timeout > happens, the SIL controller is stuck and accesses to it will eventually > cause the whole system to hang (as above). > > Was there any major change in how PCI or DMA was handled between 2.6.28 > and 2.6.32? Given the ephemeral nature of these failures (multiple runs > all eventually fail, but never the same twice), my only hope of fixing it > will be to have some ideas what might have changed.
Maybe the changes you did to the PCI outbound windows are now breaking DMA ? Make sure the outbound and inbound don't overlap for example and that all RAM is reachable for inbound. Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev