On 10/06/2017 05:10 PM, Waiman Long wrote: > Given the fact that thread mode had been merged into 4.14, it is now > time to enable cpuset to be used in the default hierarchy (cgroup v2) > as it is clearly threaded. > > The cpuset controller had experienced feature creep since its > introduction more than a decade ago. Besides the core cpus and mems > control files to limit cpus and memory nodes, there are a bunch of > additional features that can be controlled from the userspace. Some of > the features are of doubtful usefulness and may not be actively used. > > After examining the source code of some sample users like systemd, > libvirt and lxc for their use of those additional features, only > memory_migrate is used by libvirt. > > This patch enables cpuset controller in the default hierarchy with a > minimal set of features. Currently, only memory_migrate is supported. > We can certainly add more features to the default hierarchy if there > is a real user need for them later on. > > For features that are actually flags which are set internally, they are > being combined into a single "cpuset.flags" control file. That includes > the memory_migrate feature which is the only flag that is currently > supported. When the "cpuset.flags" file is read, it contains either > "+mem_migrate" (enabled) or "-mem_migrate" (disabled). > > To enable it, use > > # echo +mem_migrate > cpuset.flags > > To disable it, use > > # echo -mem_migrate > cpuset.flags > > Note that the flag name is changed to "mem_migrate" for better naming > consistency. > > v3: > - Further trim the additional features down to just memory_migrate. > - Update Documentation/cgroup-v2.txt. > > Signed-off-by: Waiman Long <longman@xxxxxxxxxx> Ping! Any comment on this patch? Cheers, Longman -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
