On Thu, 30 May 2024 19:19:48 +0800, Celeste Liu wrote:
For cgroup v1, if turned on, and there's any cgroup in the "cpu" hierarchy it needs an RT budget assigned, otherwise the processes in it will not be able to get RT at all. The problem with RT group scheduling is that it requires the budget assigned but there's no way we could assign a default budget, since the values to assign are both upper and lower time limits, are absolute, and need to be sum up to < 1 for each individal cgroup. That means we cannot really come up with values that would work by default in the general case.[1]
[...]
Patch 4 applied to powerpc/next.
[4/6] powerpc: defconfig: drop RT_GROUP_SCHED=y from ppc6xx_defconfig https://git.kernel.org/powerpc/c/2bac6caee94e25f59ee47e2d365d7e07465089ba
cheers