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Subject[f2fs-dev] [PATCH] f2fs: avoid to calculate incorrect max orphan number
Date
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>
---
fs/f2fs/checkpoint.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index b28e61b..32178f3 100644
--- 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;
--
1.7.9.5


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