John Paul Adrian Glaubitz <glaub...@physik.fu-berlin.de> writes: > Hi Michael! > > Sorry for the long time without any responses. Shall we continue debugging > this?
Yes! Sorry also that I haven't been able to fix it yet, I had to stop chasing this bug and work on other things before the end of the year. > We're currently running 5.15.x on the host system and the guests and the > testsuite > for gcc-9 still reproducibly kills the KVM host. Have you been able to try the different -smp options I suggested? Can you separately test with (on the host): # echo 0 > /sys/module/kvm_hv/parameters/dynamic_mt_modes cheers > On 11/1/21 07:53, Michael Ellerman wrote: >> Sure, will give that a try. >> >> I was able to crash my machine over the weekend, building openjdk, but I >> haven't been able to reproduce it for ~24 hours now (I didn't change >> anything). >> >> >> Can you try running your guests with no SMT threads? >> >> I think one of your guests was using: >> >> -smp 32,sockets=1,dies=1,cores=8,threads=4 >> >> Can you change that to: >> >> -smp 8,sockets=1,dies=1,cores=8,threads=1 >> >> >> And something similar for the other guest(s). >> >> If the system is stable with those settings that would be useful >> information, and would also mean you could use the system without it >> crashing semi regularly. >> >> cheers > -- > .''`. John Paul Adrian Glaubitz > : :' : Debian Developer - glaub...@debian.org > `. `' Freie Universitaet Berlin - glaub...@physik.fu-berlin.de > `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
