release 6.12.4 (preliminary)

debian/patches/patchset-zen/sauce/0016-ZEN-INTERACTIVE-Tune-EEVDF-for-interactivity.patch

@@ -1,104 +0,0 @@
-From 44a6d7ca11b601b34724dc41e086576499a096bd Mon Sep 17 00:00:00 2001
-From: "Jan Alexander Steffens (heftig)" <heftig@archlinux.org>
-Date: Tue, 31 Oct 2023 19:03:10 +0100
-Subject: ZEN: INTERACTIVE: Tune EEVDF for interactivity
-
-5.7:
-Take "sysctl_sched_nr_migrate" tune from early XanMod builds of 128. As
-of 5.7, XanMod uses 256 but that may affect applications that require
-timely response to IRQs.
-
-5.15:
-Per [a comment][1] on our ZEN INTERACTIVE commit, reducing the cost of
-migration causes the system less responsive under high load.  Most
-likely the combination of reduced migration cost + the higher number of
-tasks that can be migrated at once contributes to this.
-
-To better handle this situation, restore the mainline migration cost
-value and also reduce the max number of tasks that can be migrated in
-batch from 128 to 64.
-
-If this doesn't help, we'll restore the reduced migration cost and keep
-total number of tasks that can be migrated at once to 32.
-
-[1]: https://github.com/zen-kernel/zen-kernel/commit/be5ba234ca0a5aabe74bfc7e1f636f085bd3823c#commitcomment-63159674
-
-6.6:
-Port the tuning to EEVDF, which removed a couple of settings.
-
-6.7:
-Instead of increasing the number of tasks that migrate at once, migrate
-the amount acceptable for PREEMPT_RT, but reduce the cost so migrations
-occur more often.
-
-This should make CFS/EEVDF behave more like out-of-tree schedulers that
-aggressively use idle cores to reduce latency, but without the jank
-caused by rebalancing too many tasks at once.
----
- init/Kconfig         |  7 +++++++
- kernel/sched/fair.c  | 13 +++++++++++++
- kernel/sched/sched.h |  2 +-
- 3 files changed, 21 insertions(+), 1 deletion(-)
-
---- a/init/Kconfig
-+++ b/init/Kconfig
-@@ -159,6 +159,13 @@ config ZEN_INTERACTIVE
- 	    Background-reclaim hugepages...:   no   ->   yes
- 	    MG-LRU minimum cache TTL.......:   0    ->   1000 ms
- 
-+	  --- EEVDF CPU Scheduler --------------------------------
-+
-+	    Minimal granularity............:   0.75 ->   0.4  ms
-+	    Migration cost.................:   0.5  ->   0.25 ms
-+	    Bandwidth slice size...........:   5    ->   3    ms
-+	    Task rebalancing threshold.....:  32    ->   8
-+
- config BROKEN
- 	bool
- 
---- a/kernel/sched/fair.c
-+++ b/kernel/sched/fair.c
-@@ -73,10 +73,19 @@ unsigned int sysctl_sched_tunable_scalin
-  *
-  * (default: 0.75 msec * (1 + ilog(ncpus)), units: nanoseconds)
-  */
-+#ifdef CONFIG_ZEN_INTERACTIVE
-+unsigned int sysctl_sched_base_slice			= 400000ULL;
-+static unsigned int normalized_sysctl_sched_base_slice	= 400000ULL;
-+#else
- unsigned int sysctl_sched_base_slice			= 750000ULL;
- static unsigned int normalized_sysctl_sched_base_slice	= 750000ULL;
-+#endif
- 
-+#ifdef CONFIG_ZEN_INTERACTIVE
-+const_debug unsigned int sysctl_sched_migration_cost	= 250000UL;
-+#else
- const_debug unsigned int sysctl_sched_migration_cost	= 500000UL;
-+#endif
- 
- static int __init setup_sched_thermal_decay_shift(char *str)
- {
-@@ -121,8 +130,12 @@ int __weak arch_asym_cpu_priority(int cp
-  *
-  * (default: 5 msec, units: microseconds)
-  */
-+#ifdef CONFIG_ZEN_INTERACTIVE
-+static unsigned int sysctl_sched_cfs_bandwidth_slice		= 3000UL;
-+#else
- static unsigned int sysctl_sched_cfs_bandwidth_slice		= 5000UL;
- #endif
-+#endif
- 
- #ifdef CONFIG_NUMA_BALANCING
- /* Restrict the NUMA promotion throughput (MB/s) for each target node. */
---- a/kernel/sched/sched.h
-+++ b/kernel/sched/sched.h
-@@ -2591,7 +2591,7 @@ extern void deactivate_task(struct rq *r
- 
- extern void wakeup_preempt(struct rq *rq, struct task_struct *p, int flags);
- 
--#ifdef CONFIG_PREEMPT_RT
-+#if defined(CONFIG_PREEMPT_RT) || defined(CONFIG_ZEN_INTERACTIVE)
- # define SCHED_NR_MIGRATE_BREAK 8
- #else
- # define SCHED_NR_MIGRATE_BREAK 32