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>

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index f610c2a9bdde9561d3be71ab4d674376db8ec401..4a704a16bf17fade709923871d8e4417ef59be67 100644 (file)
--- 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))