On 12/14/18 2:23 AM, Ard Biesheuvel wrote: > On Fri, 14 Dec 2018 at 05:08, Qian Cai <cai@xxxxxx> wrote: >> Also tried to move the local TLB flush part around a bit inside >> __cpu_setup(), although it did complete kdump some times, it did trigger >> "Synchronous Exception" in EFI after a cold-reboot fairly often that >> seems no way to recover remotely without reinstalling the OS. > > This doesn't make any sense to me. If the system gets into a weird > state out of cold reboot, how could this code be the culprit? Please > check your firmware, and try to reproduce the issue on a system that > doesn't have such defects. > I'll continue investigating those "Synchronous Exception" although it is kind of hard due to I don't have any source code of the firmware to confirm it is buggy or not. I did manage to reproduce this kdump issue on around 5 of those server running a fairly recent version of the firmware (07/01/2018). I don't have access to other large CPU machines. _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
