linux-kernel - [PATCH] writeback: fix initial dirty limit

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Date:	Wed, 5 Aug 2015 19:08:40 +0200
From:	Rabin Vincent <rabin.vincent@...s.com>
To:	<axboe@...com>, <akpm@...ux-foundation.org>
CC:	<tj@...nel.org>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>, Rabin Vincent <rabinv@...s.com>
Subject: [PATCH] writeback: fix initial dirty limit

The initial value of global_wb_domain.dirty_limit set by
writeback_set_ratelimit() is zeroed out by the memset in
wb_domain_init().

Signed-off-by: Rabin Vincent <rabin.vincent@...s.com>
---
 mm/page-writeback.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 22cddd3..5cccc12 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2063,10 +2063,10 @@ static struct notifier_block ratelimit_nb = {
  */
 void __init page_writeback_init(void)
 {
+	BUG_ON(wb_domain_init(&global_wb_domain, GFP_KERNEL));
+
 	writeback_set_ratelimit();
 	register_cpu_notifier(&ratelimit_nb);
-
-	BUG_ON(wb_domain_init(&global_wb_domain, GFP_KERNEL));
 }
 
 /**
-- 
1.7.10.4

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