On 5/31/22 16:44, Mikulas Patocka wrote: > > > On Tue, 31 May 2022, Mikulas Patocka wrote: > >>> So, right now I'm somehow lost how I can help. >> >> If you don't know what causes it, I can try to add some debug printks into >> the kernel and analyze it when I have time. >> >>> You could you send me your .config, then I'll check locally. >>> Please also try a "make oldconfig" with your .config so that the options don't have any leftovers. >> >> I uploaded my config here: >> https://people.redhat.com/~mpatocka/testcases/parisc-config-5.18.txt > > CONFIG_SCHED_MC is causing it. It's on in my config, off in your config. > If I turn it off, the crash goes away. > > The crash happens in "sd_init": > > sd_span = sched_domain_span(sd); sets sd_span to an empty cpumask. > sd_id = cpumask_first(sd_span); sets sd_id to 4 (it is out of > range because CONFIG_NR_CPUS=4) > sd->shared = *per_cpu_ptr(sdd->sds, sd_id); sets sd->shared to NULL > atomic_inc(&sd->shared->ref); crashes without printing anything Nice finding! Thanks. I'm tempted to drop the CONFIG_SCHED_MC option completely from parisc... Helge
