Messages in this thread Patch in this message | | | Date | Wed, 10 Apr 2013 06:44:56 -0700 | From | tip-bot for Li Zefan <> | Subject | [tip:sched/core] sched/cpuacct: Allocate per_cpu cpuusage for root cpuacct statically |
| |
Commit-ID: 7943e15a3e91db78a7a3fbc84e45cf9d1c7c7d23 Gitweb: http://git.kernel.org/tip/7943e15a3e91db78a7a3fbc84e45cf9d1c7c7d23 Author: Li Zefan <lizefan@huawei.com> AuthorDate: Fri, 29 Mar 2013 14:43:46 +0800 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Wed, 10 Apr 2013 13:54:20 +0200
sched/cpuacct: Allocate per_cpu cpuusage for root cpuacct statically
This is a preparation, so later we can initialize cpuacct earlier.
Signed-off-by: Li Zefan <lizefan@huawei.com> Cc: Tejun Heo <tj@kernel.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/51553822.5000403@huawei.com Signed-off-by: Ingo Molnar <mingo@kernel.org> --- kernel/sched/cpuacct.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c index 9305fd2..a691c4d 100644 --- a/kernel/sched/cpuacct.c +++ b/kernel/sched/cpuacct.c @@ -58,6 +58,7 @@ static inline struct cpuacct *parent_ca(struct cpuacct *ca) return cgroup_ca(ca->css.cgroup->parent); } +static DEFINE_PER_CPU(u64, root_cpuacct_cpuusage); static struct cpuacct root_cpuacct; /* create a new cpu accounting group */ @@ -290,8 +291,7 @@ void cpuacct_account_field(struct task_struct *p, int index, u64 val) void __init cpuacct_init(void) { root_cpuacct.cpustat = &kernel_cpustat; - root_cpuacct.cpuusage = alloc_percpu(u64); - BUG_ON(!root_cpuacct.cpuusage); /* Too early, not expected to fail */ + root_cpuacct.cpuusage = &root_cpuacct_cpuusage; } struct cgroup_subsys cpuacct_subsys = {
| |