f2fs: add GC_URGENT_LOW mode in gc_urgent
Added a new gc_urgent mode, GC_URGENT_LOW, in which mode
F2FS will lower the bar of checking idle in order to
process outstanding discard commands and GC a little bit
aggressively.
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index c98a918..b747223 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1268,7 +1268,8 @@ enum {
GC_NORMAL,
GC_IDLE_CB,
GC_IDLE_GREEDY,
- GC_URGENT,
+ GC_URGENT_HIGH,
+ GC_URGENT_LOW,
};
enum {
@@ -1525,6 +1526,7 @@ struct f2fs_sb_info {
unsigned int cur_victim_sec; /* current victim section num */
unsigned int gc_mode; /* current GC state */
unsigned int next_victim_seg[2]; /* next segment in victim section */
+
/* for skip statistic */
unsigned int atomic_files; /* # of opened atomic file */
unsigned long long skipped_atomic_files[2]; /* FG_GC and BG_GC */
@@ -2465,7 +2467,7 @@ static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
{
- if (sbi->gc_mode == GC_URGENT)
+ if (sbi->gc_mode == GC_URGENT_HIGH)
return true;
if (get_pages(sbi, F2FS_RD_DATA) || get_pages(sbi, F2FS_RD_NODE) ||
@@ -2483,6 +2485,10 @@ static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
atomic_read(&SM_I(sbi)->fcc_info->queued_flush))
return false;
+ if (sbi->gc_mode == GC_URGENT_LOW &&
+ (type == DISCARD_TIME || type == GC_TIME))
+ return true;
+
return f2fs_time_over(sbi, type);
}