From e3e12f52b214121840b44c91de5b3e5af5d3eb84 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 06 Nov 2023 03:04:41 +0000
Subject: [PATCH] rk3568 rt init
---
kernel/mm/swap.c | 74 ++++++++++++++++++++++++++-----------
1 files changed, 52 insertions(+), 22 deletions(-)
diff --git a/kernel/mm/swap.c b/kernel/mm/swap.c
index 45fdbfb..3885645 100644
--- a/kernel/mm/swap.c
+++ b/kernel/mm/swap.c
@@ -33,6 +33,7 @@
#include <linux/memcontrol.h>
#include <linux/gfp.h>
#include <linux/uio.h>
+#include <linux/locallock.h>
#include <linux/hugetlb.h>
#include <linux/page_idle.h>
@@ -51,6 +52,8 @@
#ifdef CONFIG_SMP
static DEFINE_PER_CPU(struct pagevec, activate_page_pvecs);
#endif
+static DEFINE_LOCAL_IRQ_LOCK(rotate_lock);
+DEFINE_LOCAL_IRQ_LOCK(swapvec_lock);
/*
* This path almost never happens for VM activity - pages are normally
@@ -253,11 +256,11 @@
unsigned long flags;
get_page(page);
- local_irq_save(flags);
+ local_lock_irqsave(rotate_lock, flags);
pvec = this_cpu_ptr(&lru_rotate_pvecs);
if (!pagevec_add(pvec, page) || PageCompound(page))
pagevec_move_tail(pvec);
- local_irq_restore(flags);
+ local_unlock_irqrestore(rotate_lock, flags);
}
}
@@ -307,12 +310,13 @@
{
page = compound_head(page);
if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
- struct pagevec *pvec = &get_cpu_var(activate_page_pvecs);
+ struct pagevec *pvec = &get_locked_var(swapvec_lock,
+ activate_page_pvecs);
get_page(page);
if (!pagevec_add(pvec, page) || PageCompound(page))
pagevec_lru_move_fn(pvec, __activate_page, NULL);
- put_cpu_var(activate_page_pvecs);
+ put_locked_var(swapvec_lock, activate_page_pvecs);
}
}
@@ -334,7 +338,7 @@
static void __lru_cache_activate_page(struct page *page)
{
- struct pagevec *pvec = &get_cpu_var(lru_add_pvec);
+ struct pagevec *pvec = &get_locked_var(swapvec_lock, lru_add_pvec);
int i;
/*
@@ -356,7 +360,7 @@
}
}
- put_cpu_var(lru_add_pvec);
+ put_locked_var(swapvec_lock, lru_add_pvec);
}
/*
@@ -398,12 +402,12 @@
static void __lru_cache_add(struct page *page)
{
- struct pagevec *pvec = &get_cpu_var(lru_add_pvec);
+ struct pagevec *pvec = &get_locked_var(swapvec_lock, lru_add_pvec);
get_page(page);
if (!pagevec_add(pvec, page) || PageCompound(page))
__pagevec_lru_add(pvec);
- put_cpu_var(lru_add_pvec);
+ put_locked_var(swapvec_lock, lru_add_pvec);
}
/**
@@ -581,9 +585,15 @@
unsigned long flags;
/* No harm done if a racing interrupt already did this */
- local_irq_save(flags);
+#ifdef CONFIG_PREEMPT_RT_BASE
+ local_lock_irqsave_on(rotate_lock, flags, cpu);
pagevec_move_tail(pvec);
- local_irq_restore(flags);
+ local_unlock_irqrestore_on(rotate_lock, flags, cpu);
+#else
+ local_lock_irqsave(rotate_lock, flags);
+ pagevec_move_tail(pvec);
+ local_unlock_irqrestore(rotate_lock, flags);
+#endif
}
pvec = &per_cpu(lru_deactivate_file_pvecs, cpu);
@@ -615,11 +625,12 @@
return;
if (likely(get_page_unless_zero(page))) {
- struct pagevec *pvec = &get_cpu_var(lru_deactivate_file_pvecs);
+ struct pagevec *pvec = &get_locked_var(swapvec_lock,
+ lru_deactivate_file_pvecs);
if (!pagevec_add(pvec, page) || PageCompound(page))
pagevec_lru_move_fn(pvec, lru_deactivate_file_fn, NULL);
- put_cpu_var(lru_deactivate_file_pvecs);
+ put_locked_var(swapvec_lock, lru_deactivate_file_pvecs);
}
}
@@ -634,22 +645,33 @@
{
if (PageLRU(page) && PageAnon(page) && PageSwapBacked(page) &&
!PageSwapCache(page) && !PageUnevictable(page)) {
- struct pagevec *pvec = &get_cpu_var(lru_lazyfree_pvecs);
+ struct pagevec *pvec = &get_locked_var(swapvec_lock,
+ lru_lazyfree_pvecs);
get_page(page);
if (!pagevec_add(pvec, page) || PageCompound(page))
pagevec_lru_move_fn(pvec, lru_lazyfree_fn, NULL);
- put_cpu_var(lru_lazyfree_pvecs);
+ put_locked_var(swapvec_lock, lru_lazyfree_pvecs);
}
}
void lru_add_drain(void)
{
- lru_add_drain_cpu(get_cpu());
- put_cpu();
+ lru_add_drain_cpu(local_lock_cpu(swapvec_lock));
+ local_unlock_cpu(swapvec_lock);
}
#ifdef CONFIG_SMP
+
+#ifdef CONFIG_PREEMPT_RT_BASE
+static inline void remote_lru_add_drain(int cpu, struct cpumask *has_work)
+{
+ local_lock_on(swapvec_lock, cpu);
+ lru_add_drain_cpu(cpu);
+ local_unlock_on(swapvec_lock, cpu);
+}
+
+#else
static DEFINE_PER_CPU(struct work_struct, lru_add_drain_work);
@@ -657,6 +679,16 @@
{
lru_add_drain();
}
+
+static inline void remote_lru_add_drain(int cpu, struct cpumask *has_work)
+{
+ struct work_struct *work = &per_cpu(lru_add_drain_work, cpu);
+
+ INIT_WORK(work, lru_add_drain_per_cpu);
+ queue_work_on(cpu, mm_percpu_wq, work);
+ cpumask_set_cpu(cpu, has_work);
+}
+#endif
/*
* Doesn't need any cpu hotplug locking because we do rely on per-cpu
@@ -682,21 +714,19 @@
cpumask_clear(&has_work);
for_each_online_cpu(cpu) {
- struct work_struct *work = &per_cpu(lru_add_drain_work, cpu);
if (pagevec_count(&per_cpu(lru_add_pvec, cpu)) ||
pagevec_count(&per_cpu(lru_rotate_pvecs, cpu)) ||
pagevec_count(&per_cpu(lru_deactivate_file_pvecs, cpu)) ||
pagevec_count(&per_cpu(lru_lazyfree_pvecs, cpu)) ||
- need_activate_page_drain(cpu)) {
- INIT_WORK(work, lru_add_drain_per_cpu);
- queue_work_on(cpu, mm_percpu_wq, work);
- cpumask_set_cpu(cpu, &has_work);
- }
+ need_activate_page_drain(cpu))
+ remote_lru_add_drain(cpu, &has_work);
}
+#ifndef CONFIG_PREEMPT_RT_BASE
for_each_cpu(cpu, &has_work)
flush_work(&per_cpu(lru_add_drain_work, cpu));
+#endif
mutex_unlock(&lock);
}
--
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