From 39bd0d15eca5af15ee1492964f317ecdb024a9d6 Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Wed, 9 Jul 2014 16:48:01 +0800 Subject: [PATCH] cpuset: initialize top_cpuset's configured masks at mount We now have to support different behaviors for default hierachy and legacy hiearchy, top_cpuset's configured masks need to be initialized accordingly. Suppose we've offlined cpu1. On default hierarchy: # mount -t cgroup -o __DEVEL__sane_behavior xxx /cpuset # cat /cpuset/cpuset.cpus 0-15 On legacy hierarchy: # mount -t cgroup xxx /cpuset # cat /cpuset/cpuset.cpus 0,2-15 Signed-off-by: Li Zefan Signed-off-by: Tejun Heo --- kernel/cpuset.c | 37 ++++++++++++++++++++++++++++--------- 1 file changed, 28 insertions(+), 9 deletions(-) diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 60577ccdbfc7..e4c31e6b8716 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -2015,16 +2015,35 @@ static void cpuset_css_free(struct cgroup_subsys_state *css) kfree(cs); } +static void cpuset_bind(struct cgroup_subsys_state *root_css) +{ + mutex_lock(&cpuset_mutex); + mutex_lock(&callback_mutex); + + if (cgroup_on_dfl(root_css->cgroup)) { + cpumask_copy(top_cpuset.cpus_allowed, cpu_possible_mask); + top_cpuset.mems_allowed = node_possible_map; + } else { + cpumask_copy(top_cpuset.cpus_allowed, + top_cpuset.effective_cpus); + top_cpuset.mems_allowed = top_cpuset.effective_mems; + } + + mutex_unlock(&callback_mutex); + mutex_unlock(&cpuset_mutex); +} + struct cgroup_subsys cpuset_cgrp_subsys = { - .css_alloc = cpuset_css_alloc, - .css_online = cpuset_css_online, - .css_offline = cpuset_css_offline, - .css_free = cpuset_css_free, - .can_attach = cpuset_can_attach, - .cancel_attach = cpuset_cancel_attach, - .attach = cpuset_attach, - .base_cftypes = files, - .early_init = 1, + .css_alloc = cpuset_css_alloc, + .css_online = cpuset_css_online, + .css_offline = cpuset_css_offline, + .css_free = cpuset_css_free, + .can_attach = cpuset_can_attach, + .cancel_attach = cpuset_cancel_attach, + .attach = cpuset_attach, + .bind = cpuset_bind, + .base_cftypes = files, + .early_init = 1, }; /** -- GitLab