Messages in this thread Patch in this message | | | Date | Mon, 15 May 2017 02:06:34 -0700 | From | tip-bot for Lauro Ramos Venancio <> | Subject | [tip:sched/core] sched/topology: Move comment about asymmetric node setups |
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Commit-ID: c20e1ea4b61c3d99a354d912f2d74822fd2a001d Gitweb: http://git.kernel.org/tip/c20e1ea4b61c3d99a354d912f2d74822fd2a001d Author: Lauro Ramos Venancio <lvenanci@redhat.com> AuthorDate: Thu, 20 Apr 2017 16:51:42 -0300 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Mon, 15 May 2017 10:15:27 +0200
sched/topology: Move comment about asymmetric node setups
Signed-off-by: Lauro Ramos Venancio <lvenanci@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: lwang@redhat.com Cc: riel@redhat.com Link: http://lkml.kernel.org/r/1492717903-5195-4-git-send-email-lvenanci@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> --- kernel/sched/topology.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 5a4d9ae..c10f44a 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -495,14 +495,6 @@ enum s_alloc { /* * Build an iteration mask that can exclude certain CPUs from the upwards * domain traversal. - * - * Asymmetric node setups can result in situations where the domain tree is of - * unequal depth, make sure to skip domains that already cover the entire - * range. - * - * In that case build_sched_domains() will have terminated the iteration early - * and our sibling sd spans will be empty. Domains should always include the - * CPU they're built on, so check that. */ static void build_group_mask(struct sched_domain *sd, struct sched_group *sg) { @@ -590,7 +582,16 @@ build_overlap_sched_groups(struct sched_domain *sd, int cpu) sibling = *per_cpu_ptr(sdd->sd, i); - /* See the comment near build_group_mask(). */ + /* + * Asymmetric node setups can result in situations where the + * domain tree is of unequal depth, make sure to skip domains + * that already cover the entire range. + * + * In that case build_sched_domains() will have terminated the + * iteration early and our sibling sd spans will be empty. + * Domains should always include the CPU they're built on, so + * check that. + */ if (!cpumask_test_cpu(i, sched_domain_span(sibling))) continue;
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