On Wednesday, March 27, 2013 09:28:56 PM Viresh Kumar wrote: > Hi Guys, > > All patches are pushed here for others to apply (you can apply from mail to): > http://git.linaro.org/gitweb?p=people/vireshk/linux.git;a=shortlog;h=refs/heads/governor-per-policy-v4 > > Currently, there can't be multiple instances of single governor_type. If we have > a multi-package system, where we have multiple instances of struct policy (per > package), we can't have multiple instances of same governor. i.e. We can't have > multiple instances of ondemand governor for multiple packages. > > Governors directory in sysfs is created at /sys/devices/system/cpu/cpufreq/ > governor-name/. Which again reflects that there can be only one instance of a > governor_type in the system. > > This is a bottleneck for multicluster system, where we want different packages > to use same governor type, but with different tunables. > > This patchset is inclined towards fixing this issue. Now we will create > governors directory in cpu/cpu*/cpufreq/<gov> for platforms which have multiple > struct policy alive at any moment. Platform drivers requiring this feature must > set have_governor_per_policy variable in their instance of cpufreq_driver. For > others the interface is kept same: cpu/cpufreq/<gov>. > > > This is V4 of this patchset. V3 is already applied by Rafael in his linux-next > branch. Jacob Shin reported some regressions with this patchset and when I went > into testing it with his configuration I found more issues then what he > reported. > > To test these over linux-next you need to revert following first: > db9baec cpufreq: Get rid of "struct global_attr" > 86bd6f0 cpufreq: governor: Implement per policy instances of governors > 8ae67b1 cpufreq: Add per policy governor-init/exit infrastructure > > I have tested this for following now and believe there are no more regressions > with it: > - platform with a single policy instance or single group of cpu > - platform with multiple policies but which don't want per policy instance of > governor > - platform with multiple policies and which want per policy instance of governor > > I have tried with different settings and combinations of governors. > > @Rafael: To simplify your life I have sorted out your branch and you can simply > pickup the complete branch that I have pushed. I've applied these two patches and re-applied the queue on top of them. All is in my linux-next branch now. Thanks, Rafael -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
