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SubjectRe: [PATCHSET] cgroup: use static_keys for subsystem enabled and on_dfl tests
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On 2015/9/16 9:51, Tejun Heo wrote:
> cgroup_subsys->disabled and cgroup_on_dfl() tests are likely to be
> used in hot paths and seldom change. The former is set once during
> boot and the latter only when a controller is migrated between the
> default hierarchy and traditional ones.
>
> This patchset makes these tests static_key based and contains the
> following four patches.
>
> 0001-jump_label-make-static_key_enabled-work-on-static_ke.patch
> 0002-cgroup-implement-static_key-based-cgroup_subsys_enab.patch
> 0003-cgroup-replace-cgroup_subsys-disabled-tests-with-cgr.patch
> 0004-cgroup-replace-cgroup_on_dfl-tests-in-controllers-wi.patch
>
> 0001 is a prep patch in jump_label. 0002 adds the needed static_keys.
> 0003-0004 convert the existing usages and drop the old tests.
>
> This patchset is on top of v4.3-rc1 and is availalbe in the following
> git branch.
>
> git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-jump-labels
>
> diffstat follows. Thanks.
>
> block/blk-throttle.c | 2
> block/cfq-iosched.c | 4 -
> include/linux/cgroup-defs.h | 1
> include/linux/cgroup.h | 79 +++++++---------------------
> include/linux/hugetlb_cgroup.h | 4 -
> include/linux/jump_label.h | 18 +++---
> include/linux/memcontrol.h | 4 -
> kernel/cgroup.c | 113 ++++++++++++++++++++++++++++++++++++++---
> kernel/cpuset.c | 23 ++++----
> mm/memcontrol.c | 4 -
> 10 files changed, 157 insertions(+), 95 deletions(-)
>

Acked-by: Zefan Li <lizefan@huawei.com>



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