sys-kernel/linux-{image,sources}-redcore : version bump

2 files changed, 3 insertions, 767 deletions

diff --git a/sys-kernel/linux-image-redcore/files/6.8-0001-linux6.8.y-bore5.1.0.patch b/sys-kernel/linux-image-redcore/files/6.8-0001-linux6.8.y-bore5.1.0.patch
deleted file mode 100644
index 0fffdcea..00000000
--- a/sys-kernel/linux-image-redcore/files/6.8-0001-linux6.8.y-bore5.1.0.patch
+++ /dev/null
@@ -1,764 +0,0 @@
-From feae72fd7f2403910c157dd679d6ec240ed1dfbf Mon Sep 17 00:00:00 2001
-From: Masahito S <firelzrd@gmail.com>
-Date: Mon, 22 Apr 2024 04:12:58 +0900
-Subject: [PATCH] linux6.8.y-bore5.1.0
-
----
- include/linux/sched.h   |  10 ++
- init/Kconfig            |  17 +++
- kernel/sched/core.c     | 143 +++++++++++++++++++++++++
- kernel/sched/debug.c    |  60 ++++++++++-
- kernel/sched/fair.c     | 230 ++++++++++++++++++++++++++++++++++++++--
- kernel/sched/features.h |   4 +
- kernel/sched/sched.h    |   7 ++
- 7 files changed, 462 insertions(+), 9 deletions(-)
-
-diff --git a/include/linux/sched.h b/include/linux/sched.h
-index ffe8f618ab..0ab0b04240 100644
---- a/include/linux/sched.h
-+++ b/include/linux/sched.h
-@@ -547,6 +547,16 @@ struct sched_entity {
- 	u64				sum_exec_runtime;
- 	u64				prev_sum_exec_runtime;
- 	u64				vruntime;
-+#ifdef CONFIG_SCHED_BORE
-+	u64				burst_time;
-+	u8				prev_burst_penalty;
-+	u8				curr_burst_penalty;
-+	u8				burst_penalty;
-+	u8				burst_score;
-+	u8				child_burst;
-+	u32				child_burst_cnt;
-+	u64				child_burst_last_cached;
-+#endif // CONFIG_SCHED_BORE
- 	s64				vlag;
- 	u64				slice;
- 
-diff --git a/init/Kconfig b/init/Kconfig
-index bee58f7468..13427dbb48 100644
---- a/init/Kconfig
-+++ b/init/Kconfig
-@@ -1279,6 +1279,23 @@ config CHECKPOINT_RESTORE
- 
- 	  If unsure, say N here.
- 
-+config SCHED_BORE
-+	bool "Burst-Oriented Response Enhancer"
-+	default y
-+	help
-+	  In Desktop and Mobile computing, one might prefer interactive
-+	  tasks to keep responsive no matter what they run in the background.
-+
-+	  Enabling this kernel feature modifies the scheduler to discriminate
-+	  tasks by their burst time (runtime since it last went sleeping or
-+	  yielding state) and prioritize those that run less bursty.
-+	  Such tasks usually include window compositor, widgets backend,
-+	  terminal emulator, video playback, games and so on.
-+	  With a little impact to scheduling fairness, it may improve
-+	  responsiveness especially under heavy background workload.
-+
-+	  If unsure, say Y here.
-+
- config SCHED_AUTOGROUP
- 	bool "Automatic process group scheduling"
- 	select CGROUPS
-diff --git a/kernel/sched/core.c b/kernel/sched/core.c
-index 9116bcc903..d1711f75f8 100644
---- a/kernel/sched/core.c
-+++ b/kernel/sched/core.c
-@@ -4507,6 +4507,138 @@ int wake_up_state(struct task_struct *p, unsigned int state)
- 	return try_to_wake_up(p, state, 0);
- }
- 
-+#ifdef CONFIG_SCHED_BORE
-+extern u8   sched_burst_fork_atavistic;
-+extern uint sched_burst_cache_lifetime;
-+
-+static void __init sched_init_bore(void) {
-+	init_task.se.burst_time = 0;
-+	init_task.se.prev_burst_penalty = 0;
-+	init_task.se.curr_burst_penalty = 0;
-+	init_task.se.burst_penalty = 0;
-+	init_task.se.burst_score = 0;
-+	init_task.se.child_burst_last_cached = 0;
-+}
-+
-+void inline sched_fork_bore(struct task_struct *p) {
-+	p->se.burst_time = 0;
-+	p->se.curr_burst_penalty = 0;
-+	p->se.burst_score = 0;
-+	p->se.child_burst_last_cached = 0;
-+}
-+
-+static u32 count_child_tasks(struct task_struct *p) {
-+	struct task_struct *child;
-+	u32 cnt = 0;
-+	list_for_each_entry(child, &p->children, sibling) {cnt++;}
-+	return cnt;
-+}
-+
-+static inline bool task_is_inheritable(struct task_struct *p) {
-+	return (p->sched_class == &fair_sched_class);
-+}
-+
-+static inline bool child_burst_cache_expired(struct task_struct *p, u64 now) {
-+	u64 expiration_time =
-+		p->se.child_burst_last_cached + sched_burst_cache_lifetime;
-+	return ((s64)(expiration_time - now) < 0);
-+}
-+
-+static void __update_child_burst_cache(
-+	struct task_struct *p, u32 cnt, u32 sum, u64 now) {
-+	u8 avg = 0;
-+	if (cnt) avg = sum / cnt;
-+	p->se.child_burst = max(avg, p->se.burst_penalty);
-+	p->se.child_burst_cnt = cnt;
-+	p->se.child_burst_last_cached = now;
-+}
-+
-+static inline void update_child_burst_direct(struct task_struct *p, u64 now) {
-+	struct task_struct *child;
-+	u32 cnt = 0;
-+	u32 sum = 0;
-+
-+	list_for_each_entry(child, &p->children, sibling) {
-+		if (!task_is_inheritable(child)) continue;
-+		cnt++;
-+		sum += child->se.burst_penalty;
-+	}
-+
-+	__update_child_burst_cache(p, cnt, sum, now);
-+}
-+
-+static inline u8 __inherit_burst_direct(struct task_struct *p, u64 now) {
-+	struct task_struct *parent = p->real_parent;
-+	if (child_burst_cache_expired(parent, now))
-+		update_child_burst_direct(parent, now);
-+
-+	return parent->se.child_burst;
-+}
-+
-+static void update_child_burst_topological(
-+	struct task_struct *p, u64 now, u32 depth, u32 *acnt, u32 *asum) {
-+	struct task_struct *child, *dec;
-+	u32 cnt = 0, dcnt = 0;
-+	u32 sum = 0;
-+
-+	list_for_each_entry(child, &p->children, sibling) {
-+		dec = child;
-+		while ((dcnt = count_child_tasks(dec)) == 1)
-+			dec = list_first_entry(&dec->children, struct task_struct, sibling);
-+		
-+		if (!dcnt || !depth) {
-+			if (!task_is_inheritable(dec)) continue;
-+			cnt++;
-+			sum += dec->se.burst_penalty;
-+			continue;
-+		}
-+		if (!child_burst_cache_expired(dec, now)) {
-+			cnt += dec->se.child_burst_cnt;
-+			sum += (u32)dec->se.child_burst * dec->se.child_burst_cnt;
-+			continue;
-+		}
-+		update_child_burst_topological(dec, now, depth - 1, &cnt, &sum);
-+	}
-+
-+	__update_child_burst_cache(p, cnt, sum, now);
-+	*acnt += cnt;
-+	*asum += sum;
-+}
-+
-+static inline u8 __inherit_burst_topological(struct task_struct *p, u64 now) {
-+	struct task_struct *anc = p->real_parent;
-+	u32 cnt = 0, sum = 0;
-+
-+	while (anc->real_parent != anc && count_child_tasks(anc) == 1)
-+		anc = anc->real_parent;
-+
-+	if (child_burst_cache_expired(anc, now))
-+		update_child_burst_topological(
-+			anc, now, sched_burst_fork_atavistic - 1, &cnt, &sum);
-+
-+	return anc->se.child_burst;
-+}
-+
-+static inline void inherit_burst(struct task_struct *p) {
-+	u8 burst_cache;
-+	u64 now = ktime_get_ns();
-+
-+	read_lock(&tasklist_lock);
-+	burst_cache = likely(sched_burst_fork_atavistic)?
-+		__inherit_burst_topological(p, now):
-+		__inherit_burst_direct(p, now);
-+	read_unlock(&tasklist_lock);
-+
-+	p->se.prev_burst_penalty = max(p->se.prev_burst_penalty, burst_cache);
-+}
-+
-+static void sched_post_fork_bore(struct task_struct *p) {
-+	if (p->sched_class == &fair_sched_class)
-+		inherit_burst(p);
-+	p->se.burst_penalty = p->se.prev_burst_penalty;
-+}
-+#endif // CONFIG_SCHED_BORE
-+
- /*
-  * Perform scheduler related setup for a newly forked process p.
-  * p is forked by current.
-@@ -4523,6 +4655,9 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p)
- 	p->se.prev_sum_exec_runtime	= 0;
- 	p->se.nr_migrations		= 0;
- 	p->se.vruntime			= 0;
-+#ifdef CONFIG_SCHED_BORE
-+	sched_fork_bore(p);
-+#endif // CONFIG_SCHED_BORE
- 	p->se.vlag			= 0;
- 	p->se.slice			= sysctl_sched_base_slice;
- 	INIT_LIST_HEAD(&p->se.group_node);
-@@ -4839,6 +4974,9 @@ void sched_cgroup_fork(struct task_struct *p, struct kernel_clone_args *kargs)
- 
- void sched_post_fork(struct task_struct *p)
- {
-+#ifdef CONFIG_SCHED_BORE
-+	sched_post_fork_bore(p);
-+#endif // CONFIG_SCHED_BORE
- 	uclamp_post_fork(p);
- }
- 
-@@ -9910,6 +10048,11 @@ void __init sched_init(void)
- 	BUG_ON(&dl_sched_class != &stop_sched_class + 1);
- #endif
- 
-+#ifdef CONFIG_SCHED_BORE
-+	sched_init_bore();
-+	printk(KERN_INFO "BORE (Burst-Oriented Response Enhancer) CPU Scheduler modification 5.1.0 by Masahito Suzuki");
-+#endif // CONFIG_SCHED_BORE
-+
- 	wait_bit_init();
- 
- #ifdef CONFIG_FAIR_GROUP_SCHED
-diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
-index 8d5d98a583..b178612617 100644
---- a/kernel/sched/debug.c
-+++ b/kernel/sched/debug.c
-@@ -167,7 +167,52 @@ static const struct file_operations sched_feat_fops = {
- };
- 
- #ifdef CONFIG_SMP
-+#ifdef CONFIG_SCHED_BORE
-+static ssize_t sched_min_base_slice_write(struct file *filp, const char __user *ubuf,
-+				   size_t cnt, loff_t *ppos)
-+{
-+	char buf[16];
-+	unsigned int value;
-+
-+	if (cnt > 15)
-+		cnt = 15;
-+
-+	if (copy_from_user(&buf, ubuf, cnt))
-+		return -EFAULT;
-+	buf[cnt] = '\0';
-+
-+	if (kstrtouint(buf, 10, &value))
-+		return -EINVAL;
- 
-+	if (!value)
-+		return -EINVAL;
-+
-+	sysctl_sched_min_base_slice = value;
-+	sched_update_min_base_slice();
-+
-+	*ppos += cnt;
-+	return cnt;
-+}
-+
-+static int sched_min_base_slice_show(struct seq_file *m, void *v)
-+{
-+	seq_printf(m, "%d\n", sysctl_sched_min_base_slice);
-+	return 0;
-+}
-+
-+static int sched_min_base_slice_open(struct inode *inode, struct file *filp)
-+{
-+	return single_open(filp, sched_min_base_slice_show, NULL);
-+}
-+
-+static const struct file_operations sched_min_base_slice_fops = {
-+	.open		= sched_min_base_slice_open,
-+	.write		= sched_min_base_slice_write,
-+	.read		= seq_read,
-+	.llseek		= seq_lseek,
-+	.release	= single_release,
-+};
-+#else // !CONFIG_SCHED_BORE
- static ssize_t sched_scaling_write(struct file *filp, const char __user *ubuf,
- 				   size_t cnt, loff_t *ppos)
- {
-@@ -213,7 +258,7 @@ static const struct file_operations sched_scaling_fops = {
- 	.llseek		= seq_lseek,
- 	.release	= single_release,
- };
--
-+#endif // CONFIG_SCHED_BORE
- #endif /* SMP */
- 
- #ifdef CONFIG_PREEMPT_DYNAMIC
-@@ -347,13 +392,20 @@ static __init int sched_init_debug(void)
- 	debugfs_create_file("preempt", 0644, debugfs_sched, NULL, &sched_dynamic_fops);
- #endif
- 
-+#ifdef CONFIG_SCHED_BORE
-+	debugfs_create_file("min_base_slice_ns", 0644, debugfs_sched, NULL, &sched_min_base_slice_fops);
-+	debugfs_create_u32("base_slice_ns", 0400, debugfs_sched, &sysctl_sched_base_slice);
-+#else // !CONFIG_SCHED_BORE
- 	debugfs_create_u32("base_slice_ns", 0644, debugfs_sched, &sysctl_sched_base_slice);
-+#endif // CONFIG_SCHED_BORE
- 
- 	debugfs_create_u32("latency_warn_ms", 0644, debugfs_sched, &sysctl_resched_latency_warn_ms);
- 	debugfs_create_u32("latency_warn_once", 0644, debugfs_sched, &sysctl_resched_latency_warn_once);
- 
- #ifdef CONFIG_SMP
-+#if !defined(CONFIG_SCHED_BORE)
- 	debugfs_create_file("tunable_scaling", 0644, debugfs_sched, NULL, &sched_scaling_fops);
-+#endif // CONFIG_SCHED_BORE
- 	debugfs_create_u32("migration_cost_ns", 0644, debugfs_sched, &sysctl_sched_migration_cost);
- 	debugfs_create_u32("nr_migrate", 0644, debugfs_sched, &sysctl_sched_nr_migrate);
- 
-@@ -595,6 +647,9 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
- 		SPLIT_NS(schedstat_val_or_zero(p->stats.sum_sleep_runtime)),
- 		SPLIT_NS(schedstat_val_or_zero(p->stats.sum_block_runtime)));
- 
-+#ifdef CONFIG_SCHED_BORE
-+	SEQ_printf(m, " %2d", p->se.burst_score);
-+#endif // CONFIG_SCHED_BORE
- #ifdef CONFIG_NUMA_BALANCING
- 	SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p));
- #endif
-@@ -1068,6 +1123,9 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
- 
- 	P(se.load.weight);
- #ifdef CONFIG_SMP
-+#ifdef CONFIG_SCHED_BORE
-+	P(se.burst_score);
-+#endif // CONFIG_SCHED_BORE
- 	P(se.avg.load_sum);
- 	P(se.avg.runnable_sum);
- 	P(se.avg.util_sum);
-diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
-index 533547e3c9..a2346b1b44 100644
---- a/kernel/sched/fair.c
-+++ b/kernel/sched/fair.c
-@@ -19,6 +19,9 @@
-  *
-  *  Adaptive scheduling granularity, math enhancements by Peter Zijlstra
-  *  Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra
-+ *
-+ *  Burst-Oriented Response Enhancer (BORE) CPU Scheduler
-+ *  Copyright (C) 2021-2024 Masahito Suzuki <firelzrd@gmail.com>
-  */
- #include <linux/energy_model.h>
- #include <linux/mmap_lock.h>
-@@ -64,20 +67,125 @@
-  *   SCHED_TUNABLESCALING_LOG - scaled logarithmical, *1+ilog(ncpus)
-  *   SCHED_TUNABLESCALING_LINEAR - scaled linear, *ncpus
-  *
-- * (default SCHED_TUNABLESCALING_LOG = *(1+ilog(ncpus))
-+ * (BORE  default SCHED_TUNABLESCALING_NONE = *1 constant)
-+ * (EEVDF default SCHED_TUNABLESCALING_LOG  = *(1+ilog(ncpus))
-  */
-+#ifdef CONFIG_SCHED_BORE
-+unsigned int sysctl_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
-+#else // !CONFIG_SCHED_BORE
- unsigned int sysctl_sched_tunable_scaling = SCHED_TUNABLESCALING_LOG;
-+#endif // CONFIG_SCHED_BORE
- 
- /*
-  * Minimal preemption granularity for CPU-bound tasks:
-  *
-- * (default: 0.75 msec * (1 + ilog(ncpus)), units: nanoseconds)
-+ * (BORE  default: max(1 sec / HZ, min_base_slice) constant, units: nanoseconds)
-+ * (EEVDF default: 0.75 msec * (1 + ilog(ncpus)), units: nanoseconds)
-  */
-+#ifdef CONFIG_SCHED_BORE
-+unsigned int            sysctl_sched_base_slice = 1000000000ULL / HZ;
-+static unsigned int configured_sched_base_slice = 1000000000ULL / HZ;
-+unsigned int        sysctl_sched_min_base_slice =    2000000ULL;
-+#else // !CONFIG_SCHED_BORE
- unsigned int sysctl_sched_base_slice			= 750000ULL;
- static unsigned int normalized_sysctl_sched_base_slice	= 750000ULL;
-+#endif // CONFIG_SCHED_BORE
- 
- const_debug unsigned int sysctl_sched_migration_cost	= 500000UL;
- 
-+#ifdef CONFIG_SCHED_BORE
-+u8   __read_mostly sched_bore                   = 1;
-+u8   __read_mostly sched_burst_smoothness_long  = 1;
-+u8   __read_mostly sched_burst_smoothness_short = 0;
-+u8   __read_mostly sched_burst_fork_atavistic   = 2;
-+u8   __read_mostly sched_burst_penalty_offset   = 22;
-+uint __read_mostly sched_burst_penalty_scale    = 1280;
-+uint __read_mostly sched_burst_cache_lifetime   = 60000000;
-+static int __maybe_unused sixty_four     = 64;
-+static int __maybe_unused maxval_12_bits = 4095;
-+
-+#define MAX_BURST_PENALTY (39U <<2)
-+
-+static inline u32 log2plus1_u64_u32f8(u64 v) {
-+	u32 msb = fls64(v);
-+	s32 excess_bits = msb - 9;
-+    u8 fractional = (0 <= excess_bits)? v >> excess_bits: v << -excess_bits;
-+	return msb << 8 | fractional;
-+}
-+
-+static inline u32 calc_burst_penalty(u64 burst_time) {
-+	u32 greed, tolerance, penalty, scaled_penalty;
-+	
-+	greed = log2plus1_u64_u32f8(burst_time);
-+	tolerance = sched_burst_penalty_offset << 8;
-+	penalty = max(0, (s32)greed - (s32)tolerance);
-+	scaled_penalty = penalty * sched_burst_penalty_scale >> 16;
-+
-+	return min(MAX_BURST_PENALTY, scaled_penalty);
-+}
-+
-+static inline u64 scale_slice(u64 delta, struct sched_entity *se) {
-+	return mul_u64_u32_shr(delta, sched_prio_to_wmult[se->burst_score], 22);
-+}
-+
-+static inline u64 __unscale_slice(u64 delta, u8 score) {
-+	return mul_u64_u32_shr(delta, sched_prio_to_weight[score], 10);
-+}
-+
-+static inline u64 unscale_slice(u64 delta, struct sched_entity *se) {
-+	return __unscale_slice(delta, se->burst_score);
-+}
-+
-+void reweight_task(struct task_struct *p, int prio);
-+
-+static void update_burst_score(struct sched_entity *se) {
-+	if (!entity_is_task(se)) return;
-+	struct task_struct *p = task_of(se);
-+	u8 prio = p->static_prio - MAX_RT_PRIO;
-+	u8 prev_prio = min(39, prio + se->burst_score);
-+
-+	se->burst_score = se->burst_penalty >> 2;
-+
-+	u8 new_prio = min(39, prio + se->burst_score);
-+	if (new_prio != prev_prio)
-+		reweight_task(p, new_prio);
-+}
-+
-+static void update_burst_penalty(struct sched_entity *se) {
-+	se->curr_burst_penalty = calc_burst_penalty(se->burst_time);
-+	se->burst_penalty = max(se->prev_burst_penalty, se->curr_burst_penalty);
-+	update_burst_score(se);
-+}
-+
-+static inline u32 binary_smooth(u32 new, u32 old) {
-+  int increment = new - old;
-+  return (0 <= increment)?
-+    old + ( increment >> (int)sched_burst_smoothness_long):
-+    old - (-increment >> (int)sched_burst_smoothness_short);
-+}
-+
-+static void restart_burst(struct sched_entity *se) {
-+	se->burst_penalty = se->prev_burst_penalty =
-+		binary_smooth(se->curr_burst_penalty, se->prev_burst_penalty);
-+	se->curr_burst_penalty = 0;
-+	se->burst_time = 0;
-+	update_burst_score(se);
-+}
-+
-+static void restart_burst_rescale_deadline(struct sched_entity *se) {
-+	s64 vscaled, wremain, vremain = se->deadline - se->vruntime;
-+	u8 prev_score = se->burst_score;
-+	restart_burst(se);
-+	if (prev_score > se->burst_score) {
-+		wremain = __unscale_slice(abs(vremain), prev_score);
-+		vscaled = scale_slice(wremain, se);
-+		if (unlikely(vremain < 0))
-+			vscaled = -vscaled;
-+		se->deadline = se->vruntime + vscaled;
-+	}
-+}
-+#endif // CONFIG_SCHED_BORE
-+
- int sched_thermal_decay_shift;
- static int __init setup_sched_thermal_decay_shift(char *str)
- {
-@@ -137,6 +245,69 @@ static unsigned int sysctl_numa_balancing_promote_rate_limit = 65536;
- 
- #ifdef CONFIG_SYSCTL
- static struct ctl_table sched_fair_sysctls[] = {
-+#ifdef CONFIG_SCHED_BORE
-+	{
-+		.procname	= "sched_bore",
-+		.data		= &sched_bore,
-+		.maxlen		= sizeof(u8),
-+		.mode		= 0644,
-+		.proc_handler = proc_dou8vec_minmax,
-+		.extra1		= SYSCTL_ONE,
-+		.extra2		= SYSCTL_ONE,
-+	},
-+	{
-+		.procname	= "sched_burst_smoothness_long",
-+		.data		= &sched_burst_smoothness_long,
-+		.maxlen		= sizeof(u8),
-+		.mode		= 0644,
-+		.proc_handler = proc_dou8vec_minmax,
-+		.extra1		= SYSCTL_ZERO,
-+		.extra2		= SYSCTL_ONE,
-+	},
-+	{
-+		.procname	= "sched_burst_smoothness_short",
-+		.data		= &sched_burst_smoothness_short,
-+		.maxlen		= sizeof(u8),
-+		.mode		= 0644,
-+		.proc_handler = proc_dou8vec_minmax,
-+		.extra1		= SYSCTL_ZERO,
-+		.extra2		= SYSCTL_ONE,
-+	},
-+	{
-+		.procname	= "sched_burst_fork_atavistic",
-+		.data		= &sched_burst_fork_atavistic,
-+		.maxlen		= sizeof(u8),
-+		.mode		= 0644,
-+		.proc_handler = proc_dou8vec_minmax,
-+		.extra1		= SYSCTL_ZERO,
-+		.extra2		= SYSCTL_THREE,
-+	},
-+	{
-+		.procname	= "sched_burst_penalty_offset",
-+		.data		= &sched_burst_penalty_offset,
-+		.maxlen		= sizeof(u8),
-+		.mode		= 0644,
-+		.proc_handler = proc_dou8vec_minmax,
-+		.extra1		= SYSCTL_ZERO,
-+		.extra2		= &sixty_four,
-+	},
-+	{
-+		.procname	= "sched_burst_penalty_scale",
-+		.data		= &sched_burst_penalty_scale,
-+		.maxlen		= sizeof(uint),
-+		.mode		= 0644,
-+		.proc_handler = proc_douintvec_minmax,
-+		.extra1		= SYSCTL_ZERO,
-+		.extra2		= &maxval_12_bits,
-+	},
-+	{
-+		.procname	= "sched_burst_cache_lifetime",
-+		.data		= &sched_burst_cache_lifetime,
-+		.maxlen		= sizeof(uint),
-+		.mode		= 0644,
-+		.proc_handler = proc_douintvec,
-+	},
-+#endif // CONFIG_SCHED_BORE
- #ifdef CONFIG_CFS_BANDWIDTH
- 	{
- 		.procname       = "sched_cfs_bandwidth_slice_us",
-@@ -195,6 +366,13 @@ static inline void update_load_set(struct load_weight *lw, unsigned long w)
-  *
-  * This idea comes from the SD scheduler of Con Kolivas:
-  */
-+#ifdef CONFIG_SCHED_BORE
-+static void update_sysctl(void) {
-+	sysctl_sched_base_slice =
-+		max(sysctl_sched_min_base_slice, configured_sched_base_slice);
-+}
-+void sched_update_min_base_slice(void) { update_sysctl(); }
-+#else // !CONFIG_SCHED_BORE
- static unsigned int get_update_sysctl_factor(void)
- {
- 	unsigned int cpus = min_t(unsigned int, num_online_cpus(), 8);
-@@ -225,6 +403,7 @@ static void update_sysctl(void)
- 	SET_SYSCTL(sched_base_slice);
- #undef SET_SYSCTL
- }
-+#endif // CONFIG_SCHED_BORE
- 
- void __init sched_init_granularity(void)
- {
-@@ -704,6 +883,9 @@ static void update_entity_lag(struct cfs_rq *cfs_rq, struct sched_entity *se)
- 	lag = avg_vruntime(cfs_rq) - se->vruntime;
- 
- 	limit = calc_delta_fair(max_t(u64, 2*se->slice, TICK_NSEC), se);
-+#ifdef CONFIG_SCHED_BORE
-+	limit >>= 1;
-+#endif // CONFIG_SCHED_BORE
- 	se->vlag = clamp(lag, -limit, limit);
- }
- 
-@@ -955,6 +1137,7 @@ struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq)
-  * Scheduling class statistics methods:
-  */
- #ifdef CONFIG_SMP
-+#if !defined(CONFIG_SCHED_BORE)
- int sched_update_scaling(void)
- {
- 	unsigned int factor = get_update_sysctl_factor();
-@@ -966,6 +1149,7 @@ int sched_update_scaling(void)
- 
- 	return 0;
- }
-+#endif // CONFIG_SCHED_BORE
- #endif
- #endif
- 
-@@ -1165,7 +1349,13 @@ static void update_curr(struct cfs_rq *cfs_rq)
- 	if (unlikely(delta_exec <= 0))
- 		return;
- 
-+#ifdef CONFIG_SCHED_BORE
-+	curr->burst_time += delta_exec;
-+	update_burst_penalty(curr);
-+	curr->vruntime += max(1ULL, calc_delta_fair(delta_exec, curr));
-+#else // !CONFIG_SCHED_BORE
- 	curr->vruntime += calc_delta_fair(delta_exec, curr);
-+#endif // CONFIG_SCHED_BORE
- 	update_deadline(cfs_rq, curr);
- 	update_min_vruntime(cfs_rq);
- 
-@@ -3671,10 +3861,9 @@ dequeue_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se) { }
- #endif
- 
- static void reweight_eevdf(struct cfs_rq *cfs_rq, struct sched_entity *se,
--			   unsigned long weight)
-+			   unsigned long weight, u64 avruntime)
- {
- 	unsigned long old_weight = se->load.weight;
--	u64 avruntime = avg_vruntime(cfs_rq);
- 	s64 vlag, vslice;
- 
- 	/*
-@@ -3782,11 +3971,13 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
- {
- 	bool curr = cfs_rq->curr == se;
- 
-+	if (curr)
-+		update_curr(cfs_rq);
-+	u64 avruntime = avg_vruntime(cfs_rq);
-+
- 	if (se->on_rq) {
- 		/* commit outstanding execution time */
--		if (curr)
--			update_curr(cfs_rq);
--		else
-+		if (!curr)
- 			__dequeue_entity(cfs_rq, se);
- 		update_load_sub(&cfs_rq->load, se->load.weight);
- 	}
-@@ -3799,7 +3990,7 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
- 		 */
- 		se->vlag = div_s64(se->vlag * se->load.weight, weight);
- 	} else {
--		reweight_eevdf(cfs_rq, se, weight);
-+		reweight_eevdf(cfs_rq, se, weight, avruntime);
- 	}
- 
- 	update_load_set(&se->load, weight);
-@@ -5171,6 +5362,9 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
- 	 *
- 	 * EEVDF: placement strategy #1 / #2
- 	 */
-+#ifdef CONFIG_SCHED_BORE
-+	if (se->vlag)
-+#endif // CONFIG_SCHED_BORE
- 	if (sched_feat(PLACE_LAG) && cfs_rq->nr_running) {
- 		struct sched_entity *curr = cfs_rq->curr;
- 		unsigned long load;
-@@ -6803,6 +6997,14 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags)
- 	bool was_sched_idle = sched_idle_rq(rq);
- 
- 	util_est_dequeue(&rq->cfs, p);
-+#ifdef CONFIG_SCHED_BORE
-+	if (task_sleep) {
-+		cfs_rq = cfs_rq_of(se);
-+		if (cfs_rq->curr == se)
-+			update_curr(cfs_rq);
-+		restart_burst(se);
-+	}
-+#endif // CONFIG_SCHED_BORE
- 
- 	for_each_sched_entity(se) {
- 		cfs_rq = cfs_rq_of(se);
-@@ -8552,16 +8754,25 @@ static void yield_task_fair(struct rq *rq)
- 	/*
- 	 * Are we the only task in the tree?
- 	 */
-+#if !defined(CONFIG_SCHED_BORE)
- 	if (unlikely(rq->nr_running == 1))
- 		return;
- 
- 	clear_buddies(cfs_rq, se);
-+#endif // CONFIG_SCHED_BORE
- 
- 	update_rq_clock(rq);
- 	/*
- 	 * Update run-time statistics of the 'current'.
- 	 */
- 	update_curr(cfs_rq);
-+#ifdef CONFIG_SCHED_BORE
-+	restart_burst_rescale_deadline(se);
-+	if (unlikely(rq->nr_running == 1))
-+		return;
-+
-+	clear_buddies(cfs_rq, se);
-+#endif // CONFIG_SCHED_BORE
- 	/*
- 	 * Tell update_rq_clock() that we've just updated,
- 	 * so we don't do microscopic update in schedule()
-@@ -12651,6 +12862,9 @@ static void task_fork_fair(struct task_struct *p)
- 	curr = cfs_rq->curr;
- 	if (curr)
- 		update_curr(cfs_rq);
-+#ifdef CONFIG_SCHED_BORE
-+	update_burst_score(se);
-+#endif // CONFIG_SCHED_BORE
- 	place_entity(cfs_rq, se, ENQUEUE_INITIAL);
- 	rq_unlock(rq, &rf);
- }
-diff --git a/kernel/sched/features.h b/kernel/sched/features.h
-index 143f55df89..3f0fe409f5 100644
---- a/kernel/sched/features.h
-+++ b/kernel/sched/features.h
-@@ -6,7 +6,11 @@
-  */
- SCHED_FEAT(PLACE_LAG, true)
- SCHED_FEAT(PLACE_DEADLINE_INITIAL, true)
-+#ifdef CONFIG_SCHED_BORE
-+SCHED_FEAT(RUN_TO_PARITY, false)
-+#else // !CONFIG_SCHED_BORE
- SCHED_FEAT(RUN_TO_PARITY, true)
-+#endif // CONFIG_SCHED_BORE
- 
- /*
-  * Prefer to schedule the task we woke last (assuming it failed
-diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
-index 001fe047bd..da3ad1d4e1 100644
---- a/kernel/sched/sched.h
-+++ b/kernel/sched/sched.h
-@@ -1965,7 +1965,11 @@ static inline void dirty_sched_domain_sysctl(int cpu)
- }
- #endif
- 
-+#ifdef CONFIG_SCHED_BORE
-+extern void sched_update_min_base_slice(void);
-+#else // !CONFIG_SCHED_BORE
- extern int sched_update_scaling(void);
-+#endif // CONFIG_SCHED_BORE
- 
- static inline const struct cpumask *task_user_cpus(struct task_struct *p)
- {
-@@ -2552,6 +2556,9 @@ extern const_debug unsigned int sysctl_sched_nr_migrate;
- extern const_debug unsigned int sysctl_sched_migration_cost;
- 
- extern unsigned int sysctl_sched_base_slice;
-+#ifdef CONFIG_SCHED_BORE
-+extern unsigned int sysctl_sched_min_base_slice;
-+#endif // CONFIG_SCHED_BORE
- 
- #ifdef CONFIG_SCHED_DEBUG
- extern int sysctl_resched_latency_warn_ms;
--- 
-2.34.1
-
diff --git a/sys-kernel/linux-image-redcore/files/6.8-amd64.config b/sys-kernel/linux-image-redcore/files/6.8-amd64.config
index 3c8ea00f..da53b1c0 100644
--- a/sys-kernel/linux-image-redcore/files/6.8-amd64.config
+++ b/sys-kernel/linux-image-redcore/files/6.8-amd64.config
@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 6.8.7-redcore-r1 Kernel Configuration
+# Linux/x86 6.8.9-redcore Kernel Configuration
 #
 CONFIG_CC_VERSION_TEXT="gcc (Gentoo Hardened 13.2.0-r15 p3) 13.2.0"
 CONFIG_CC_IS_GCC=y
@@ -233,7 +233,6 @@ CONFIG_USER_NS_UNPRIVILEGED=y
 CONFIG_PID_NS=y
 CONFIG_NET_NS=y
 CONFIG_CHECKPOINT_RESTORE=y
-CONFIG_SCHED_BORE=y
 CONFIG_SCHED_AUTOGROUP=y
 CONFIG_RELAY=y
 CONFIG_BLK_DEV_INITRD=y
@@ -524,7 +523,7 @@ CONFIG_CALL_PADDING=y
 CONFIG_HAVE_CALL_THUNKS=y
 CONFIG_CALL_THUNKS=y
 CONFIG_PREFIX_SYMBOLS=y
-CONFIG_SPECULATION_MITIGATIONS=y
+CONFIG_CPU_MITIGATIONS=y
 CONFIG_PAGE_TABLE_ISOLATION=y
 CONFIG_RETPOLINE=y
 CONFIG_RETHUNK=y
@@ -750,6 +749,7 @@ CONFIG_AS_SHA256_NI=y
 CONFIG_AS_TPAUSE=y
 CONFIG_AS_GFNI=y
 CONFIG_AS_WRUSS=y
+CONFIG_ARCH_CONFIGURES_CPU_MITIGATIONS=y
 
 #
 # General architecture-dependent options