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Merge tag 'cgroup-for-7.1-rc3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

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Pull cgroup fixes from Tejun Heo:

 - cpuset fixes:
     - Partition invalidation could return CPUs still in use by sibling
       partitions, producing overlapping effective_cpus
     - cpuset_can_attach() over-reserved DL bandwidth on moves that
       stayed within the same root domain
     - Pending DL migration state leaked into later attaches when a
       later can_attach() check failed
     - Reorder PF_EXITING and __GFP_HARDWALL checks so dying tasks can
       allocate from any node and exit quickly

 - dmem: propagate -ENOMEM instead of spinning forever when the fallback
   pool allocation also fails

 - selftests/cgroup: percpu test error-path leak, bogus numeric
   comparison of cpuset strings, and a zero-length read() that silently
   passed OOM-kill tests

* tag 'cgroup-for-7.1-rc3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup/cpuset: Return only actually allocated CPUs during partition invalidation
  selftests/cgroup: Fix error path leaks in test_percpu_basic
  cgroup/cpuset: Reserve DL bandwidth only for root-domain moves
  cgroup/cpuset: Reset DL migration state on can_attach() failure
  selftests/cgroup: Fix string comparison in write_test
  selftests/cgroup: Fix cg_read_strcmp() empty string comparison
  cgroup/dmem: Return -ENOMEM on failed pool preallocation
  cgroup/cpuset: move PF_EXITING check before __GFP_HARDWALL in cpuset_current_node_allowed()
This commit is contained in:
Linus Torvalds
2026-05-13 14:56:31 -07:00
parent 50599e4c68 345f401666
commit 0913b580f8
8 changed files with 65 additions and 36 deletions
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9
include/linux/sched/deadline.h
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@@ -33,6 +33,15 @@ struct root_domain;
extern void dl_add_task_root_domain(struct task_struct *p);
extern void dl_clear_root_domain(struct root_domain *rd);
extern void dl_clear_root_domain_cpu(int cpu);
/*
* Return whether moving DL task @p to @new_mask requires moving DL
* bandwidth accounting between root domains. This helper is specific to
* DL bandwidth move accounting semantics and is shared by
* cpuset_can_attach() and set_cpus_allowed_dl() so both paths use the
* same source root-domain test.
*/
extern bool dl_task_needs_bw_move(struct task_struct *p,
const struct cpumask *new_mask);
extern u64 dl_cookie;
extern bool dl_bw_visited(int cpu, u64 cookie);