On 3/24/23 6:15 PM, Michael Ellerman wrote: > Jens Axboe <ax...@kernel.dk> writes: >> On 3/24/23 1:27?AM, Christophe Leroy wrote: >>> Le 23/03/2023 ? 19:54, Jens Axboe a ?crit : >>>> I got a report sent to me from mariadb, in where 5.10.158 works fine and >>>> 5.10.162 is broken. And in fact, current 6.3-rc also fails the test >>>> case. Beware that this email is long, as I'm trying to include >>>> everything that may be relevant... >>> >>> Which variant of powerpc ? 32 or 64 bits ? Book3S or BookE ? >> >> I knew I'd forget something important... It's power9: >> >> processor : 0 >> cpu : POWER9 (architected), altivec supported >> clock : 2200.000000MHz >> revision : 2.2 (pvr 004e 1202) > > Believe it or not there's still more variables in play, Power9 has two > different MMUs, and Linux can run on two different hypervisors as well > as on bare metal P9 :)
Just my luck :-) > > Can you paste the last ~10 lines of /proc/cpuinfo, with the "machine", > "firmware" and "MMU" lines, that should tell us everything we need to > know. timebase : 512000000 platform : pSeries model : IBM pSeries (emulated by qemu) machine : CHRP IBM pSeries (emulated by qemu) MMU : Radix I know it reproduces bare metal as well, but no details on what that box is. I just know I was able to reproduce it in this vm that I was able to get my hands on. -- Jens Axboe
