Messages in this thread | | | Date | Fri, 14 Jun 2019 13:02:53 -0700 | From | Tejun Heo <> | Subject | [GIT PULL] cgroup fixes for v5.2-rc4 |
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Hello,
This pull request has unusually high density of tricky fixes.
* task_get_css() could deadlock when it races against a dying cgroup.
* cgroup.procs didn't list thread group leaders with live threads. This could mislead readers to think that a cgroup is empty when it's not. Fixed by making PROCS iterator include dead tasks. I made a couple mistakes making this change and this pull request contains a couple follow-up patches.
* When cpusets run out of online cpus, it updates cpusmasks of member tasks in bizarre ways. Joel improved the behavior significantly.
Thanks.
The following changes since commit 9fb67d643f6f1892a08ee3a04ea54022d1060bb0:
Merge tag 'pinctrl-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl (2019-05-28 09:35:04 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-5.2-fixes
for you to fetch changes up to d477f8c202d1f0d4791ab1263ca7657bbe5cf79e:
cpuset: restore sanity to cpuset_cpus_allowed_fallback() (2019-06-12 11:00:08 -0700)
---------------------------------------------------------------- Joel Savitz (1): cpuset: restore sanity to cpuset_cpus_allowed_fallback()
Odin Ugedal (1): docs cgroups: add another example size for hugetlb
Tejun Heo (6): cgroup: Use css_tryget() instead of css_tryget_online() in task_get_css() cgroup: Call cgroup_release() before __exit_signal() cgroup: Implement css_task_iter_skip() cgroup: Include dying leaders with live threads in PROCS iterations cgroup: css_task_iter_skip()'d iterators must be advanced before accessed cgroup: Fix css_task_iter_advance_css_set() cset skip condition
Documentation/cgroup-v1/hugetlb.txt | 22 +++++--- include/linux/cgroup-defs.h | 1 + include/linux/cgroup.h | 14 ++++- kernel/cgroup/cgroup.c | 106 ++++++++++++++++++++++++++---------- kernel/cgroup/cpuset.c | 15 ++++- kernel/exit.c | 2 +- 6 files changed, 117 insertions(+), 43 deletions(-)
-- tejun
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