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| author |  Tim C Chen <tim.c.chen@linux.intel.com>
| 2023-05-04 09:09:51 -0700 |
|---|---|---|
| committer |  Peter Zijlstra <peterz@infradead.org>
| 2023-05-08 10:58:39 +0200 |
| commit | bf2dc42d6beb890c995b8b09f881ef1b37259107 (patch) | |
| tree | 0fa4d27c5b8cccbfba963252d041de71846c35ea /kernel/sched | |
| parent | psi: remove 500ms min window size limitation for triggers (diff) | |
| download | linux-bf2dc42d6beb890c995b8b09f881ef1b37259107.tar.gz linux-bf2dc42d6beb890c995b8b09f881ef1b37259107.tar.bz2 linux-bf2dc42d6beb890c995b8b09f881ef1b37259107.zip | |
sched/topology: Propagate SMT flags when removing degenerate domain
When a degenerate cluster domain for core with SMT CPUs is removed,
the SD_SHARE_CPUCAPACITY flag in the local child sched group was not
propagated to the new parent. We need this flag to properly determine
whether the local sched group is SMT. Set the flag in the local
child sched group of the new parent sched domain.
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Link: https://lkml.kernel.org/r/73cf0959eafa53c02e7ef6bf805d751d9190e55d.1683156492.git.tim.c.chen@linux.intel.com
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/topology.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 6682535e37c8..ca4472281c28 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -719,8 +719,13 @@ cpu_attach_domain(struct sched_domain *sd, struct root_domain *rd, int cpu) if (sd_parent_degenerate(tmp, parent)) { tmp->parent = parent->parent; - if (parent->parent) + + if (parent->parent) { parent->parent->child = tmp; + if (tmp->flags & SD_SHARE_CPUCAPACITY) + parent->parent->groups->flags |= SD_SHARE_CPUCAPACITY; + } + /* * Transfer SD_PREFER_SIBLING down in case of a * degenerate parent; the spans match for this |