lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 20 Feb 2012 01:24:12 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Cc:	Rik van Riel <riel@...hat.com>, Hugh Dickins <hughd@...gle.com>,
	Mel Gorman <mgorman@...e.de>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Johannes Weiner <jweiner@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: [PATCH 1/3] mm: drain percpu lru add/rotate page-vectors on cpu
 hot-unplug

This cpu hotplug hook was accidentally removed in commit v2.6.30-rc4-18-g00a62ce
("mm: fix Committed_AS underflow on large NR_CPUS environment")

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org>
---
 include/linux/swap.h |    1 +
 mm/page_alloc.c      |    1 +
 mm/swap.c            |    4 ++--
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 80cf6b8..727bbe3 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -215,6 +215,7 @@ extern void lru_add_page_tail(struct zone* zone,
 extern void activate_page(struct page *);
 extern void mark_page_accessed(struct page *);
 extern void lru_add_drain(void);
+extern void lru_add_drain_cpu(int cpu);
 extern int lru_add_drain_all(void);
 extern void rotate_reclaimable_page(struct page *page);
 extern void deactivate_page(struct page *page);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index dd4ea43..fe5a6fe 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4821,6 +4821,7 @@ static int page_alloc_cpu_notify(struct notifier_block *self,
 	int cpu = (unsigned long)hcpu;
 
 	if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) {
+		lru_add_drain_cpu(cpu);
 		drain_pages(cpu);
 
 		/*
diff --git a/mm/swap.c b/mm/swap.c
index fff1ff7..38b2686 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -496,7 +496,7 @@ static void lru_deactivate_fn(struct page *page, void *arg)
  * Either "cpu" is the current CPU, and preemption has already been
  * disabled; or "cpu" is being hot-unplugged, and is already dead.
  */
-static void drain_cpu_pagevecs(int cpu)
+void lru_add_drain_cpu(int cpu)
 {
 	struct pagevec *pvecs = per_cpu(lru_add_pvecs, cpu);
 	struct pagevec *pvec;
@@ -553,7 +553,7 @@ void deactivate_page(struct page *page)
 
 void lru_add_drain(void)
 {
-	drain_cpu_pagevecs(get_cpu());
+	lru_add_drain_cpu(get_cpu());
 	put_cpu();
 }
 

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists