In FG_GC process, it will search victim section twice. This will
cause some dirty section with less valid blocks skip garbage
collection.
section # 26425 : valid blocks # 3
142.037567: get_victim_by_default: victim 26425 : valid blocks # 3
142.037585: f2fs_get_victim: dev = (259,30), type = No TYPE, policy =
(Foreground GC, LFS-mode, Greedy), victim = 26425 ofs_unit = 1,
pre_victim_secno = 26425, prefree = 0, free = 244
142.039494: f2fs_get_victim: dev = (259,30), type = Hot DATA, policy =
(Background GC, SSR-mode, Greedy), victim = 19022 ofs_unit = 1,
pre_victim_secno = 26425, prefree = 0, free = 24
142.070247: new_curseg: Debug: alloc new segment 26746
142.244341: f2fs_get_victim: dev = (259,30), type = No TYPE, policy =
(Foreground GC, LFS-mode, Greedy), victim = 26054 ofs_unit = 1,
pre_victim_secno = 26054, prefree = 0, free = 243
142.254475: do_garbage_collect: Debug: FG_GC, seg_freed = 1
142.293131: f2fs_get_victim: dev = (259,30), type = Warm DATA, policy =
(Background GC, SSR-mode, Greedy), victim = 23466 ofs_unit = 1,
pre_victim_secno = -1, prefree = 0, free = 244
142.319001: f2fs_get_victim: dev = (259,30), type = Warm DATA, policy =
(Background GC, SSR-mode, Greedy), victim = 23467 ofs_unit = 1,
pre_victim_secno = -1, prefree = 0, free = 244
142.368879: get_victim_by_default: victim 26425 : valid blocks # 3
142.368894: f2fs_get_victim: dev = (259,30), type = No TYPE, policy =
(Foreground GC, LFS-mode, Greedy), victim = 26425 ofs_unit = 1,
pre_victim_secno = 26425, prefree = 0, free = 244
142.378127: f2fs_get_victim: dev = (259,30), type = Hot DATA, policy =
(Background GC, SSR-mode, Greedy), victim = 19612 ofs_unit = 1,
pre_victim_secno = 26425, prefree = 0, free = 24
142.416917: new_curseg: Debug: alloc new segment 26054
142.656794: f2fs_get_victim: dev = (259,30), type = No TYPE, policy =
(Foreground GC, LFS-mode, Greedy), victim = 25404 ofs_unit = 1,
pre_victim_secno = 25404, prefree = 0, free = 243
142.662139: do_garbage_collect: Debug: FG_GC, seg_freed = 1
142.684159: new_curseg: Debug: alloc new segment 25197
142.685059: get_victim_by_default: victim 26425 : valid blocks # 3
142.685079: f2fs_get_victim: dev = (259,30), type = No TYPE, policy =
(Foreground GC, LFS-mode, Greedy), victim = 26425 ofs_unit = 1,
pre_victim_secno = 26425, prefree = 0, free = 243
142.701427: f2fs_get_victim: dev = (259,30), type = No TYPE, policy =
(Foreground GC, LFS-mode, Greedy), victim = 26238 ofs_unit = 1,
pre_victim_secno = 26238, prefree = 0, free = 243
142.707105: do_garbage_collect: Debug: FG_GC, seg_freed = 1
142.802444: f2fs_get_victim: dev = (259,30), type = Warm DATA, policy =
(Background GC, SSR-mode, Greedy), victim = 23473 ofs_unit = 1,
pre_victim_secno = -1, prefree = 0, free = 244
142.804422: get_victim_by_default: victim 26425 : valid blocks # 3
142.804443: f2fs_get_victim: dev = (259,30), type = No TYPE, policy =
(Foreground GC, LFS-mode, Greedy), victim = 26425 ofs_unit = 1,
pre_victim_secno = 26425, prefree = 0, free = 244
142.851567: f2fs_get_victim: dev = (259,30), type = Hot DATA, policy =
(Background GC, SSR-mode, Greedy), victim = 19092 ofs_unit = 1,
pre_victim_secno = 26425, prefree = 0, free = 24
142.865014: new_curseg: Debug: alloc new segment 26238
143.082245: f2fs_get_victim: dev = (259,30), type = No TYPE, policy =
(Foreground GC, LFS-mode, Greedy), victim = 26307 ofs_unit = 1,
pre_victim_secno = 26307, prefree = 0, free = 244
143.088252: do_garbage_collect: Debug: FG_GC, seg_freed = 1
143.128307: new_curseg: Debug: alloc new segment 25404
143.181846: get_victim_by_default: victim 26425 : valid blocks # 3
143.181872: f2fs_get_victim: dev = (259,30), type = No TYPE, policy =
(Foreground GC, LFS-mode, Greedy), victim = 26425 ofs_unit = 1,
pre_victim_secno = 26425, prefree = 0, free = 244
Signed-off-by: Yunlei He <heyun...@huawei.com>
---
fs/f2fs/gc.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 88e5e7b..74e1553 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -943,12 +943,10 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, bool
background)
* enough free sections, we should flush dent/node blocks and do
* garbage collections.
*/
- if (__get_victim(sbi, &segno, gc_type) ||
- prefree_segments(sbi)) {
+ if (dirty_segments(sbi) || prefree_segments(sbi)) {
ret = write_checkpoint(sbi, &cpc);
if (ret)
goto stop;
- segno = NULL_SEGNO;
} else if (has_not_enough_free_secs(sbi, 0, 0)) {
ret = write_checkpoint(sbi, &cpc);
if (ret)
@@ -959,7 +957,7 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, bool
background)
goto stop;
}
- if (segno == NULL_SEGNO && !__get_victim(sbi, &segno, gc_type))
+ if (!__get_victim(sbi, &segno, gc_type))
goto stop;
ret = 0;
--
2.10.1
------------------------------------------------------------------------------
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