linux-kernel - [PATCH 2/2] f2fs: fix to enlarge size of write_io

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Date:   Mon, 27 Feb 2017 18:43:13 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     <jaegeuk@...nel.org>
CC:     <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>, <chao@...nel.org>,
        Chao Yu <yuchao0@...wei.com>
Subject: [PATCH 2/2] f2fs: fix to enlarge size of write_io_dummy mempool

It needs to double cache size of write_io_dummy mempool, otherwise we may
run out of cache in scenraio of Data/Node IOs were issued concurrently.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fs/f2fs/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 53305880c455..7571eb297b21 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1929,7 +1929,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
 
 	if (F2FS_IO_SIZE(sbi) > 1) {
 		sbi->write_io_dummy =
-			mempool_create_page_pool(F2FS_IO_SIZE(sbi) - 1, 0);
+			mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
 		if (!sbi->write_io_dummy)
 			goto free_options;
 	}
-- 
2.8.2.295.g3f1c1d0