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authorLinus Torvalds <torvalds@linux-foundation.org>2015-06-26 19:50:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-06-26 19:50:04 -0700
commitbbe179f88d39274630823a0dc07d2714fd19a103 (patch)
treef70181a660e0f859f230233643faded7d44360e5 /init
parent4b703b1d4c46ca4a00109ca1a391943ec21991b3 (diff)
parent8a0792ef8e01f03cb43806c6a87738bde34df713 (diff)
downloadlinux-linaro-stable-bbe179f88d39274630823a0dc07d2714fd19a103.tar.gz
Merge branch 'for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo: - threadgroup_lock got reorganized so that its users can pick the actual locking mechanism to use. Its only user - cgroups - is updated to use a percpu_rwsem instead of per-process rwsem. This makes things a bit lighter on hot paths and allows cgroups to perform and fail multi-task (a process) migrations atomically. Multi-task migrations are used in several places including the unified hierarchy. - Delegation rule and documentation added to unified hierarchy. This will likely be the last interface update from the cgroup core side for unified hierarchy before lifting the devel mask. - Some groundwork for the pids controller which is scheduled to be merged in the coming devel cycle. * 'for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: add delegation section to unified hierarchy documentation cgroup: require write perm on common ancestor when moving processes on the default hierarchy cgroup: separate out cgroup_procs_write_permission() from __cgroup_procs_write() kernfs: make kernfs_get_inode() public MAINTAINERS: add a cgroup core co-maintainer cgroup: fix uninitialised iterator in for_each_subsys_which cgroup: replace explicit ss_mask checking with for_each_subsys_which cgroup: use bitmask to filter for_each_subsys cgroup: add seq_file forward declaration for struct cftype cgroup: simplify threadgroup locking sched, cgroup: replace signal_struct->group_rwsem with a global percpu_rwsem sched, cgroup: reorganize threadgroup locking cgroup: switch to unsigned long for bitmasks cgroup: reorganize include/linux/cgroup.h cgroup: separate out include/linux/cgroup-defs.h cgroup: fix some comment typos
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index f0c2e681b506..7d1ffd2ae536 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -924,6 +924,7 @@ config NUMA_BALANCING_DEFAULT_ENABLED
menuconfig CGROUPS
bool "Control Group support"
select KERNFS
+ select PERCPU_RWSEM
help
This option adds support for grouping sets of processes together, for
use with process control subsystems such as Cpusets, CFS, memory