Excerpts from Michael Ellerman's message of September 15, 2020 10:54 pm: > Michal Suchánek <msucha...@suse.de> writes: >> Hello, >> >> Using the SLB mutihit injection test module (which I did not write so I >> do not want to post it here) to verify updates on my 5.3 frankernekernel >> I found that the kernel crashes with Oops: kernel bad access. >> >> I tested on latest upstream kernel build that I have at hand and the >> result is te same (minus the message - nothing was logged and the kernel >> simply rebooted). > > That's disappointing.
It seems to work okay with qemu and mambo injection on upstream (powernv_defconfig). I wonder why that nmi_enter is crashing. Can you post the output of a successful test with the patch reverted? qemu injection test output - [ 195.279885][ C0] Disabling lock debugging due to kernel taint [ 195.280891][ C0] MCE: CPU0: machine check (Warning) Host SLB Multihit DAR: 00000000deadbeef [Recovered] [ 195.282117][ C0] MCE: CPU0: NIP: [c00000000003c2b4] isa300_idle_stop_mayloss+0x68/0x6c [ 195.283631][ C0] MCE: CPU0: Initiator CPU [ 195.284432][ C0] MCE: CPU0: Probable Software error (some chance of hardware cause) [ 220.711577][ T90] MCE: CPU0: machine check (Warning) Host SLB Multihit DAR: 00000000deadbeef [Recovered] [ 220.712805][ T90] MCE: CPU0: PID: 90 Comm: yes NIP: [00007fff7fdac2e0] [ 220.713553][ T90] MCE: CPU0: Initiator CPU [ 220.714021][ T90] MCE: CPU0: Probable Software error (some chance of hardware cause) Thanks, Nick
