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authorChen Yu <yu.c.chen@intel.com>2023-07-13 09:31:33 +0800
committerPeter Zijlstra <peterz@infradead.org>2023-07-26 12:28:51 +0200
commit4efcc8bc7e08c09c58a2f5cbc2096fbda5b7cf5e (patch)
tree8789fa65c2a006f035e102e0e6eb271be41672e1 /kernel/sched/topology.c
parentc2e164ac33f75e0acb93004960c73bd9166d3d35 (diff)
sched/topology: Align group flags when removing degenerate domain
The flags of the child of a given scheduling domain are used to initialize the flags of its scheduling groups. When the child of a scheduling domain is degenerated, the flags of its local scheduling group need to be updated to align with the flags of its new child domain. The flag SD_SHARE_CPUCAPACITY was aligned in Commit bf2dc42d6beb ("sched/topology: Propagate SMT flags when removing degenerate domain"). Further generalize this alignment so other flags can be used later, such as in cluster-based task wakeup. [1] Reported-by: Yicong Yang <yangyicong@huawei.com> Suggested-by: Ricardo Neri <ricardo.neri@intel.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com> Reviewed-by: Yicong Yang <yangyicong@hisilicon.com> Link: https://lore.kernel.org/r/20230713013133.2314153-1-yu.c.chen@intel.com
Diffstat (limited to 'kernel/sched/topology.c')
-rw-r--r--kernel/sched/topology.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 7cfcfe5d27b9..05a5bc678c08 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -722,8 +722,7 @@ cpu_attach_domain(struct sched_domain *sd, struct root_domain *rd, int cpu)
if (parent->parent) {
parent->parent->child = tmp;
- if (tmp->flags & SD_SHARE_CPUCAPACITY)
- parent->parent->groups->flags |= SD_SHARE_CPUCAPACITY;
+ parent->parent->groups->flags = tmp->flags;
}
/*