[PATCH v6 16/17] sched/topology: Mark SD_NUMA as SDF_NEEDS_GROUPS

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From: Valentin Schneider <valentin.schneider@arm.com>
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: mingo@kernel.org, peterz@infradead.org,
	vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
	morten.rasmussen@arm.com, Quentin Perret <qperret@google.com>
Subject: [PATCH v6 16/17] sched/topology: Mark SD_NUMA as SDF_NEEDS_GROUPS
Date: Mon, 17 Aug 2020 12:30:02 +0100	[thread overview]
Message-ID: <20200817113003.20802-17-valentin.schneider@arm.com> (raw)
In-Reply-To: <20200817113003.20802-1-valentin.schneider@arm.com>

There would be no point in preserving a sched_domain with a single group
just because it has this flag set. Add it to SD_DEGENERATE_GROUPS_MASK.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
---
 include/linux/sched/sd_flags.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/sched/sd_flags.h b/include/linux/sched/sd_flags.h
index 021b909d3941..71675afa55f0 100644
--- a/include/linux/sched/sd_flags.h
+++ b/include/linux/sched/sd_flags.h
@@ -151,5 +151,6 @@ SD_FLAG(SD_OVERLAP, SDF_SHARED_PARENT | SDF_NEEDS_GROUPS)
  * Cross-node balancing
  *
  * SHARED_PARENT: Set for all NUMA levels above NODE.
+ * NEEDS_GROUPS: No point in preserving domain if it has a single group.
  */
-SD_FLAG(SD_NUMA, SDF_SHARED_PARENT)
+SD_FLAG(SD_NUMA, SDF_SHARED_PARENT | SDF_NEEDS_GROUPS)
-- 
2.27.0

WARNING: multiple messages have this Message-ID (diff)

From: Valentin Schneider <valentin.schneider@arm.com>
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: vincent.guittot@linaro.org, Quentin Perret <qperret@google.com>,
	peterz@infradead.org, morten.rasmussen@arm.com, mingo@kernel.org,
	dietmar.eggemann@arm.com
Subject: [PATCH v6 16/17] sched/topology: Mark SD_NUMA as SDF_NEEDS_GROUPS
Date: Mon, 17 Aug 2020 12:30:02 +0100	[thread overview]
Message-ID: <20200817113003.20802-17-valentin.schneider@arm.com> (raw)
In-Reply-To: <20200817113003.20802-1-valentin.schneider@arm.com>

There would be no point in preserving a sched_domain with a single group
just because it has this flag set. Add it to SD_DEGENERATE_GROUPS_MASK.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
---
 include/linux/sched/sd_flags.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/sched/sd_flags.h b/include/linux/sched/sd_flags.h
index 021b909d3941..71675afa55f0 100644
--- a/include/linux/sched/sd_flags.h
+++ b/include/linux/sched/sd_flags.h
@@ -151,5 +151,6 @@ SD_FLAG(SD_OVERLAP, SDF_SHARED_PARENT | SDF_NEEDS_GROUPS)
  * Cross-node balancing
  *
  * SHARED_PARENT: Set for all NUMA levels above NODE.
+ * NEEDS_GROUPS: No point in preserving domain if it has a single group.
  */
-SD_FLAG(SD_NUMA, SDF_SHARED_PARENT)
+SD_FLAG(SD_NUMA, SDF_SHARED_PARENT | SDF_NEEDS_GROUPS)
-- 
2.27.0


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next prev parent reply	other threads:[~2020-08-17 11:31 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-17 11:29 [PATCH v6 00/17] sched: Instrument sched domain flags Valentin Schneider
2020-08-17 11:29 ` Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 01/17] ARM, sched/topology: Remove SD_SHARE_POWERDOMAIN Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 02/17] ARM: Revert back to default scheduler topology Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] ARM, sched/topology: " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 03/17] sched/topology: Split out SD_* flags declaration to its own file Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 04/17] sched/topology: Define and assign sched_domain flag metadata Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 05/17] sched/topology: Verify SD_* flags setup when sched_debug is on Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 06/17] sched/debug: Output SD flag names rather than their values Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 07/17] sched/topology: Introduce SD metaflag for flags needing > 1 groups Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 08/17] sched/topology: Use prebuilt SD flag degeneration mask Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 09/17] sched/topology: Remove SD_SERIALIZE degeneration special case Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 10/17] sched/topology: Propagate SD_ASYM_CPUCAPACITY upwards Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 11/17] sched/topology: Mark SD_PREFER_SIBLING as SDF_NEEDS_GROUPS Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 12/17] sched/topology: Mark SD_BALANCE_WAKE " Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:29 ` [PATCH v6 13/17] sched/topology: Mark SD_SERIALIZE " Valentin Schneider
2020-08-17 11:29   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:30 ` [PATCH v6 14/17] sched/topology: Mark SD_ASYM_PACKING " Valentin Schneider
2020-08-17 11:30   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:30 ` [PATCH v6 15/17] sched/topology: Mark SD_OVERLAP " Valentin Schneider
2020-08-17 11:30   ` Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:30 ` Valentin Schneider [this message]
2020-08-17 11:30   ` [PATCH v6 16/17] sched/topology: Mark SD_NUMA " Valentin Schneider
2020-08-19 14:02   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2020-08-17 11:30 ` [PATCH v6 17/17] sched/topology: Expand use of SD_DEGENERATE_GROUPS_MASK to flags not needing groups Valentin Schneider
2020-08-17 11:30   ` Valentin Schneider

find likely ancestor, descendant, or conflicting patches for this message:
dfblob:021b909d394 dfblob:021b909d394 dfblob:71675afa55f
dfblob:71675afa55f
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