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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-09-17 21:10:23 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-09-17 21:10:23 +0300 |
| commit | e5a710d13247975444c9a18e28413e566c334271 (patch) | |
| tree | 6d03a36d7cd3d04902c80d387726d28f4e4846f6 /arch | |
| parent | e54ca3c81f2d81e4de3339873256e568f60ce076 (diff) | |
| parent | 108af4b4bd3813610701379a58538e3339b162e4 (diff) | |
| download | linux-e5a710d13247975444c9a18e28413e566c334271.tar.xz | |
Merge tag 'sched-urgent-2023-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"Fix a performance regression on large SMT systems, an Intel SMT4
balancing bug, and a topology setup bug on (Intel) hybrid processors"
* tag 'sched-urgent-2023-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/sched: Restore the SD_ASYM_PACKING flag in the DIE domain
sched/fair: Fix SMT4 group_smt_balance handling
sched/fair: Optimize should_we_balance() for large SMT systems
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 4e45ff44aa07..48e040618731 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -579,7 +579,6 @@ static bool match_llc(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o) } -#if defined(CONFIG_SCHED_SMT) || defined(CONFIG_SCHED_CLUSTER) || defined(CONFIG_SCHED_MC) static inline int x86_sched_itmt_flags(void) { return sysctl_sched_itmt_enabled ? SD_ASYM_PACKING : 0; @@ -603,7 +602,14 @@ static int x86_cluster_flags(void) return cpu_cluster_flags() | x86_sched_itmt_flags(); } #endif -#endif + +static int x86_die_flags(void) +{ + if (cpu_feature_enabled(X86_FEATURE_HYBRID_CPU)) + return x86_sched_itmt_flags(); + + return 0; +} /* * Set if a package/die has multiple NUMA nodes inside. @@ -640,7 +646,7 @@ static void __init build_sched_topology(void) */ if (!x86_has_numa_in_package) { x86_topology[i++] = (struct sched_domain_topology_level){ - cpu_cpu_mask, SD_INIT_NAME(DIE) + cpu_cpu_mask, x86_die_flags, SD_INIT_NAME(DIE) }; } |