f2fs: avoid to calculate incorrect max orphan number

Because we will write node summaries when do_checkpoint with umount flag,
our number of max orphan blocks should minus NR_CURSEG_NODE_TYPE additional.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Shu Tan <shu.tan@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 21e7215..c7e0572 100644 (file)
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -190,12 +190,13 @@ int acquire_orphan_inode(struct f2fs_sb_info *sbi)
        int err = 0;
 
        /*
-        * considering 512 blocks in a segment 5 blocks are needed for cp
+        * considering 512 blocks in a segment 8 blocks are needed for cp
         * and log segment summaries. Remaining blocks are used to keep
         * orphan entries with the limitation one reserved segment
-        * for cp pack we can have max 1020*507 orphan entries
+        * for cp pack we can have max 1020*504 orphan entries
         */
-       max_orphans = (sbi->blocks_per_seg - 5) * F2FS_ORPHANS_PER_BLOCK;
+       max_orphans = (sbi->blocks_per_seg - 2 - NR_CURSEG_TYPE)
+                               * F2FS_ORPHANS_PER_BLOCK;
        mutex_lock(&sbi->orphan_inode_mutex);
        if (sbi->n_orphans >= max_orphans)
                err = -ENOSPC;