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author | Yunlei He <heyunlei@huawei.com> | 2017-02-17 17:16:38 +0800 |
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committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-02-23 11:23:26 -0800 |
commit | 05eeb118a0e9fdc675a1f9db05039693da3ea25e (patch) | |
tree | a9659d211e019e02908c42663167684aa9b1f70e /fs/f2fs/gc.c | |
parent | 5012de209b704ab460ddc5787a5f010cbd4af954 (diff) | |
download | linux-stable-05eeb118a0e9fdc675a1f9db05039693da3ea25e.tar.gz linux-stable-05eeb118a0e9fdc675a1f9db05039693da3ea25e.tar.bz2 linux-stable-05eeb118a0e9fdc675a1f9db05039693da3ea25e.zip |
f2fs: replace __get_victim by dirty_segments in FG_GC
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 <heyunlei@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/gc.c')
-rw-r--r-- | fs/f2fs/gc.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 88e5e7b10ab6..5ee258ebf6ca 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -927,8 +927,6 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, bool background) cpc.reason = __get_cp_reason(sbi); gc_more: - segno = NULL_SEGNO; - if (unlikely(!(sbi->sb->s_flags & MS_ACTIVE))) goto stop; if (unlikely(f2fs_cp_error(sbi))) { @@ -943,12 +941,10 @@ gc_more: * 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 +955,7 @@ gc_more: goto stop; } - if (segno == NULL_SEGNO && !__get_victim(sbi, &segno, gc_type)) + if (!__get_victim(sbi, &segno, gc_type)) goto stop; ret = 0; |