Adding debian version 4.19.249-2.debian/4.19.249-2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 211 insertions, 0 deletions

diff --git a/debian/patches-rt/0077-mm-swap-Convert-to-percpu-locked.patch b/debian/patches-rt/0077-mm-swap-Convert-to-percpu-locked.patch
new file mode 100644
index 000000000..a2925871b
--- /dev/null
+++ b/debian/patches-rt/0077-mm-swap-Convert-to-percpu-locked.patch
@@ -0,0 +1,211 @@
+From cba209957a582e2758768ae3c7e5be17d11fc94a Mon Sep 17 00:00:00 2001
+From: Ingo Molnar <mingo@elte.hu>
+Date: Fri, 3 Jul 2009 08:29:51 -0500
+Subject: [PATCH 077/347] mm/swap: Convert to percpu locked
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz
+
+Replace global locks (get_cpu + local_irq_save) with "local_locks()".
+Currently there is one of for "rotate" and one for "swap".
+
+Signed-off-by: Ingo Molnar <mingo@elte.hu>
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+---
+ include/linux/swap.h |  2 ++
+ mm/compaction.c      |  6 ++++--
+ mm/page_alloc.c      |  3 ++-
+ mm/swap.c            | 38 ++++++++++++++++++++++----------------
+ 4 files changed, 30 insertions(+), 19 deletions(-)
+
+diff --git a/include/linux/swap.h b/include/linux/swap.h
+index ee8f9f554a9e..2ad000e362bd 100644
+--- a/include/linux/swap.h
++++ b/include/linux/swap.h
+@@ -12,6 +12,7 @@
+ #include <linux/fs.h>
+ #include <linux/atomic.h>
+ #include <linux/page-flags.h>
++#include <linux/locallock.h>
+ #include <asm/page.h>
+ 
+ struct notifier_block;
+@@ -331,6 +332,7 @@ extern unsigned long nr_free_pagecache_pages(void);
+ 
+ 
+ /* linux/mm/swap.c */
++DECLARE_LOCAL_IRQ_LOCK(swapvec_lock);
+ extern void lru_cache_add(struct page *);
+ extern void lru_cache_add_anon(struct page *page);
+ extern void lru_cache_add_file(struct page *page);
+diff --git a/mm/compaction.c b/mm/compaction.c
+index 5079ddbec8f9..c40d3a13cbbd 100644
+--- a/mm/compaction.c
++++ b/mm/compaction.c
+@@ -1668,10 +1668,12 @@ static enum compact_result compact_zone(struct zone *zone, struct compact_contro
+ 				block_start_pfn(cc->migrate_pfn, cc->order);
+ 
+ 			if (cc->last_migrated_pfn < current_block_start) {
+-				cpu = get_cpu();
++				cpu = get_cpu_light();
++				local_lock_irq(swapvec_lock);
+ 				lru_add_drain_cpu(cpu);
++				local_unlock_irq(swapvec_lock);
+ 				drain_local_pages(zone);
+-				put_cpu();
++				put_cpu_light();
+ 				/* No more flushing until we migrate again */
+ 				cc->last_migrated_pfn = 0;
+ 			}
+diff --git a/mm/page_alloc.c b/mm/page_alloc.c
+index 59ea701ecfe0..11c08cfd6dfb 100644
+--- a/mm/page_alloc.c
++++ b/mm/page_alloc.c
+@@ -7257,8 +7257,9 @@ void __init free_area_init(unsigned long *zones_size)
+ 
+ static int page_alloc_cpu_dead(unsigned int cpu)
+ {
+-
++	local_lock_irq_on(swapvec_lock, cpu);
+ 	lru_add_drain_cpu(cpu);
++	local_unlock_irq_on(swapvec_lock, cpu);
+ 	drain_pages(cpu);
+ 
+ 	/*
+diff --git a/mm/swap.c b/mm/swap.c
+index 45fdbfb6b2a6..92f994b962f0 100644
+--- a/mm/swap.c
++++ b/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 @@ static DEFINE_PER_CPU(struct pagevec, lru_lazyfree_pvecs);
+ #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 @@ void rotate_reclaimable_page(struct page *page)
+ 		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 @@ void activate_page(struct page *page)
+ {
+ 	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 @@ void activate_page(struct page *page)
+ 
+ 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 @@ static void __lru_cache_activate_page(struct page *page)
+ 		}
+ 	}
+ 
+-	put_cpu_var(lru_add_pvec);
++	put_locked_var(swapvec_lock, lru_add_pvec);
+ }
+ 
+ /*
+@@ -398,12 +402,12 @@ EXPORT_SYMBOL(mark_page_accessed);
+ 
+ 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 +585,9 @@ void lru_add_drain_cpu(int cpu)
+ 		unsigned long flags;
+ 
+ 		/* No harm done if a racing interrupt already did this */
+-		local_irq_save(flags);
++		local_lock_irqsave(rotate_lock, flags);
+ 		pagevec_move_tail(pvec);
+-		local_irq_restore(flags);
++		local_unlock_irqrestore(rotate_lock, flags);
+ 	}
+ 
+ 	pvec = &per_cpu(lru_deactivate_file_pvecs, cpu);
+@@ -615,11 +619,12 @@ void deactivate_file_page(struct page *page)
+ 		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);
+ 	}
+ }
+ 
+@@ -634,19 +639,20 @@ void mark_page_lazyfree(struct page *page)
+ {
+ 	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
+-- 
+2.36.1
+