On Mon, Mar 4, 2013 at 2:40 AM, Jia Hongtao <b38...@freescale.com> wrote: > A PCIe erratum of mpc85xx may causes a core hang when a link of PCIe > goes down. when the link goes down, Non-posted transactions issued > via the ATMU requiring completion result in an instruction stall. > At the same time a machine-check exception is generated to the core > to allow further processing by the handler. We implements the handler > which skips the instruction caused the stall.
Can you explain at a high level how just skipping an instruction solves anything? If you just skip a load/store and continue like nothing is wrong, isn't your system possibly in a really bad state. And if the core is already hung, due to the PCI link going down, isn't it too late? How does skipping help? Stuart _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
