f2fs: fix to overcome inline_data floods

The scenario is:
1. create lots of node blocks
2. sync
3. write lots of inline_data
-> got panic due to no free space

In that case, we should flush node blocks when writing inline_data in #3,
and trigger gc as well.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index f610c2a9bdde..4a704a16bf17 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -838,8 +838,15 @@ gc_more:
 
         if (gc_type == BG_GC && has_not_enough_free_secs(sbi, sec_freed)) {
                 gc_type = FG_GC;
+                /*
+                 * If there is no victim and no prefree segment but still not
+                 * enough free sections, we should flush dent/node blocks and do
+                 * garbage collections.
+                 */
                 if (__get_victim(sbi, &segno, gc_type) || prefree_segments(sbi))
                         write_checkpoint(sbi, &cpc);
+                else if (has_not_enough_free_secs(sbi, 0))
+                        write_checkpoint(sbi, &cpc);
         }
 
         if (segno == NULL_SEGNO && !__get_victim(sbi, &segno, gc_type))