linux-kernel - [PATCH 4.15 27/53] f2fs: fix heap mode to reset it back

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Message-Id: <20180417155724.487207079@linuxfoundation.org>
Date:   Tue, 17 Apr 2018 17:58:52 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yunlong Song <yunlong.song@...wei.com>,
        Chao Yu <yuchao0@...wei.com>, Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 4.15 27/53] f2fs: fix heap mode to reset it back

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yunlong Song <yunlong.song@...wei.com>

commit b94929d975c8423defc9aededb0f499ff936b509 upstream.

Commit 7a20b8a61eff81bdb7097a578752a74860e9d142 ("f2fs: allocate node
and hot data in the beginning of partition") introduces another mount
option, heap, to reset it back. But it does not do anything for heap
mode, so fix it.

Cc: stable@...r.kernel.org
Signed-off-by: Yunlong Song <yunlong.song@...wei.com>
Reviewed-by: Chao Yu <yuchao0@...wei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/f2fs/gc.c      |    5 +++--
 fs/f2fs/segment.c |    3 ++-
 2 files changed, 5 insertions(+), 3 deletions(-)

--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -191,8 +191,9 @@ static void select_policy(struct f2fs_sb
 	if (gc_type != FG_GC && p->max_search > sbi->max_victim_search)
 		p->max_search = sbi->max_victim_search;
 
-	/* let's select beginning hot/small space first */
-	if (type == CURSEG_HOT_DATA || IS_NODESEG(type))
+	/* let's select beginning hot/small space first in no_heap mode*/
+	if (test_opt(sbi, NOHEAP) &&
+		(type == CURSEG_HOT_DATA || IS_NODESEG(type)))
 		p->offset = 0;
 	else
 		p->offset = SIT_I(sbi)->last_victim[p->gc_mode];
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2155,7 +2155,8 @@ static unsigned int __get_next_segno(str
 	if (sbi->segs_per_sec != 1)
 		return CURSEG_I(sbi, type)->segno;
 
-	if (type == CURSEG_HOT_DATA || IS_NODESEG(type))
+	if (test_opt(sbi, NOHEAP) &&
+		(type == CURSEG_HOT_DATA || IS_NODESEG(type)))
 		return 0;
 
 	if (SIT_I(sbi)->last_victim[ALLOC_NEXT])