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f2fs: avoid race condition for shrinker count

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Light reported sometimes shinker gets nat_cnt < dirty_nat_cnt resulting in
wrong do_shinker work. Let's avoid to return insane overflowed value by adding
single tracking value.

Reported-by: Light Hsieh <Light.Hsieh@mediatek.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2020-11-06 13:22:05 -08:00
parent 5fdb322ff2
commit a95ba66ac1
6 changed files with 36 additions and 24 deletions
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11
fs/f2fs/debug.c
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@ -145,8 +145,8 @@ static void update_general_status(struct f2fs_sb_info *sbi)
si->node_pages = NODE_MAPPING(sbi)->nrpages;
if (sbi->meta_inode)
si->meta_pages = META_MAPPING(sbi)->nrpages;
si->nats = NM_I(sbi)->nat_cnt;
si->dirty_nats = NM_I(sbi)->dirty_nat_cnt;
si->nats = NM_I(sbi)->nat_cnt[TOTAL_NAT];
si->dirty_nats = NM_I(sbi)->nat_cnt[DIRTY_NAT];
si->sits = MAIN_SEGS(sbi);
si->dirty_sits = SIT_I(sbi)->dirty_sentries;
si->free_nids = NM_I(sbi)->nid_cnt[FREE_NID];
@ -278,9 +278,10 @@ get_cache:
si->cache_mem += (NM_I(sbi)->nid_cnt[FREE_NID] +
NM_I(sbi)->nid_cnt[PREALLOC_NID]) *
sizeof(struct free_nid);
si->cache_mem += NM_I(sbi)->nat_cnt * sizeof(struct nat_entry);
si->cache_mem += NM_I(sbi)->dirty_nat_cnt *
sizeof(struct nat_entry_set);
si->cache_mem += NM_I(sbi)->nat_cnt[TOTAL_NAT] *
sizeof(struct nat_entry);
si->cache_mem += NM_I(sbi)->nat_cnt[DIRTY_NAT] *
sizeof(struct nat_entry_set);
si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages);
for (i = 0; i < MAX_INO_ENTRY; i++)
si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);