diff options
Diffstat (limited to 'meta-eas/recipes-kernel/linux/linux-renesas/0050-sched-Introduce-SD_SHARE_CAP_STATES-sched_domain-fla.patch')
| -rw-r--r-- | meta-eas/recipes-kernel/linux/linux-renesas/0050-sched-Introduce-SD_SHARE_CAP_STATES-sched_domain-fla.patch | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/meta-eas/recipes-kernel/linux/linux-renesas/0050-sched-Introduce-SD_SHARE_CAP_STATES-sched_domain-fla.patch b/meta-eas/recipes-kernel/linux/linux-renesas/0050-sched-Introduce-SD_SHARE_CAP_STATES-sched_domain-fla.patch new file mode 100644 index 0000000..a55cd11 --- /dev/null +++ b/meta-eas/recipes-kernel/linux/linux-renesas/0050-sched-Introduce-SD_SHARE_CAP_STATES-sched_domain-fla.patch @@ -0,0 +1,83 @@ +From 1e2c379e10555b3efa8b7f8e4552b9ddae237491 Mon Sep 17 00:00:00 2001 +From: Morten Rasmussen <morten.rasmussen@arm.com> +Date: Tue, 13 Jan 2015 13:50:46 +0000 +Subject: [PATCH 50/92] sched: Introduce SD_SHARE_CAP_STATES sched_domain flag + +cpufreq is currently keeping it a secret which cpus are sharing +clock source. The scheduler needs to know about clock domains as well +to become more energy aware. The SD_SHARE_CAP_STATES domain flag +indicates whether cpus belonging to the sched_domain share capacity +states (P-states). + +There is no connection with cpufreq (yet). The flag must be set by +the arch specific topology code. + +cc: Russell King <linux@arm.linux.org.uk> +cc: Ingo Molnar <mingo@redhat.com> +cc: Peter Zijlstra <peterz@infradead.org> + +Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com> +(cherry picked from commit d5cfb54bc10768bf25da557c1cd7c91df6ae6296) +Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com> +--- + include/linux/sched.h | 1 + + kernel/sched/core.c | 10 +++++++--- + 2 files changed, 8 insertions(+), 3 deletions(-) + +diff --git a/include/linux/sched.h b/include/linux/sched.h +index 0522149..fad382a 100644 +--- a/include/linux/sched.h ++++ b/include/linux/sched.h +@@ -1035,6 +1035,7 @@ extern void wake_q_add(struct wake_q_head *head, + #define SD_PREFER_SIBLING 0x1000 /* Prefer to place tasks in a sibling domain */ + #define SD_OVERLAP 0x2000 /* sched_domains of this level overlap */ + #define SD_NUMA 0x4000 /* cross-node balancing */ ++#define SD_SHARE_CAP_STATES 0x8000 /* Domain members share capacity state */ + + #ifdef CONFIG_SCHED_SMT + static inline int cpu_smt_flags(void) +diff --git a/kernel/sched/core.c b/kernel/sched/core.c +index f31ea62..b450329 100644 +--- a/kernel/sched/core.c ++++ b/kernel/sched/core.c +@@ -5772,7 +5772,8 @@ static int sd_degenerate(struct sched_domain *sd) + SD_SHARE_CPUCAPACITY | + SD_ASYM_CPUCAPACITY | + SD_SHARE_PKG_RESOURCES | +- SD_SHARE_POWERDOMAIN)) { ++ SD_SHARE_POWERDOMAIN | ++ SD_SHARE_CAP_STATES)) { + if (sd->groups != sd->groups->next) + return 0; + } +@@ -5805,7 +5806,8 @@ static int sd_degenerate(struct sched_domain *sd) + SD_SHARE_CPUCAPACITY | + SD_SHARE_PKG_RESOURCES | + SD_PREFER_SIBLING | +- SD_SHARE_POWERDOMAIN); ++ SD_SHARE_POWERDOMAIN | ++ SD_SHARE_CAP_STATES); + if (parent->groups->sge) { + parent->flags &= ~SD_LOAD_BALANCE; + return 0; +@@ -6515,6 +6517,7 @@ static void claim_allocations(int cpu, struct sched_domain *sd) + * SD_NUMA - describes NUMA topologies + * SD_SHARE_POWERDOMAIN - describes shared power domain + * SD_ASYM_CPUCAPACITY - describes mixed capacity topologies ++ * SD_SHARE_CAP_STATES - describes shared capacity states + * + * Odd one out, which beside describing the topology has a quirk also + * prescribes the desired behaviour that goes along with it: +@@ -6527,7 +6530,8 @@ static void claim_allocations(int cpu, struct sched_domain *sd) + SD_NUMA | \ + SD_ASYM_PACKING | \ + SD_ASYM_CPUCAPACITY | \ +- SD_SHARE_POWERDOMAIN) ++ SD_SHARE_POWERDOMAIN | \ ++ SD_SHARE_CAP_STATES) + + static struct sched_domain * + sd_init(struct sched_domain_topology_level *tl, +-- +1.9.1 + |