On Wed, Jun 29, 2022 at 06:45:48PM +0200, Jason A. Donenfeld wrote: > On Wed, Jun 29, 2022 at 06:37:01PM +0200, Christoph Hellwig wrote: > > be a policy set somewhere either in the kernel or fed into the kernel > > by userspace. Then we can key it off that, and I suspect it is > > probably going to be a runtime variable and not a config option. > > Right, this would be a good way of addressing it. > > Maybe some Android people on the list have a good idea off hand of what > Android uses at runtime to control this, and how it'd be accessible in > the kernel? In case it helps, in the case of CONFIG_RCU_EXP_CPU_STALL_TIMEOUT, the Android guys can use things like defconfig at kernel-build time or the rcu_exp_cpu_stall_timeout kernel-boot/sysfs parameter at boot time or runtime. Thanx, Paul
