linux-kernel - [PATCH 1/3] f2fs: avoid using __GFP

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Date:   Sun,  5 Nov 2017 21:53:28 +0800
From:   Chao Yu <chao@...nel.org>
To:     jaegeuk@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Chao Yu <yuchao0@...wei.com>
Subject: [PATCH 1/3] f2fs: avoid using __GFP_NOFAIL

From: Chao Yu <yuchao0@...wei.com>

We will keep __add_ino_entry success all the time, for ENOMEM failure
case, we have already handled it with an opened loop code, so we don't
have to use redundant __GFP_NOFAIL in radix_tree_preload, remove it.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fs/f2fs/checkpoint.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 98777c1ae70c..43ee9d97fd8f 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -405,10 +405,11 @@ static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino,
 {
 	struct inode_management *im = &sbi->im[type];
 	struct ino_entry *e, *tmp;
+	bool preloaded;
 
 	tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
 retry:
-	radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
+	preloaded = !radix_tree_preload(GFP_NOFS);
 
 	spin_lock(&im->ino_lock);
 	e = radix_tree_lookup(&im->ino_root, ino);
@@ -416,7 +417,8 @@ static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino,
 		e = tmp;
 		if (radix_tree_insert(&im->ino_root, ino, e)) {
 			spin_unlock(&im->ino_lock);
-			radix_tree_preload_end();
+			if (preloaded)
+				radix_tree_preload_end();
 			goto retry;
 		}
 		memset(e, 0, sizeof(struct ino_entry));
@@ -431,7 +433,9 @@ static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino,
 		f2fs_set_bit(devidx, (char *)&e->dirty_device);
 
 	spin_unlock(&im->ino_lock);
-	radix_tree_preload_end();
+
+	if (preloaded)
+		radix_tree_preload_end();
 
 	if (e != tmp)
 		kmem_cache_free(ino_entry_slab, tmp);
-- 
2.14.1.145.gb3622a4ee