On Wed, Mar 13, 2019 at 12:07:49PM -0400, Johannes Weiner wrote:
> On Tue, Mar 12, 2019 at 03:34:04PM -0700, Roman Gushchin wrote:
> > @@ -2180,50 +2179,8 @@ static int memcg_hotplug_cpu_dead(unsigned int cpu)
> > + for_each_mem_cgroup(memcg)
> > + memcg_flush_offline_percpu(memcg,
On Tue, Mar 12, 2019 at 03:34:04PM -0700, Roman Gushchin wrote:
> @@ -2180,50 +2179,8 @@ static int memcg_hotplug_cpu_dead(unsigned int cpu)
> + for_each_mem_cgroup(memcg)
> + memcg_flush_offline_percpu(memcg, get_cpu_mask(cpu));
cpumask_of(cpu) is the official API function, with
It's possible to remove a big chunk of the redundant code by making
memcg_flush_offline_percpu() to take cpumask as an argument and flush
percpu data on all cpus belonging to the mask instead of all possible cpus.
Then memcg_hotplug_cpu_dead() can call it with a single CPU bit set.
This approach
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