Commit 4fb7c70a authored by Zhang Yi's avatar Zhang Yi Committed by Theodore Ts'o
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ext4: correct the cache_nr in tracepoint ext4_es_shrink_exit 



The cache_cnt parameter of tracepoint ext4_es_shrink_exit means the
remaining cache count after shrink, but now it is the cache count before
shrink, fix it by read sbi->s_extent_cache_cnt again.

Fixes: 1ab6c499 ("fs: convert fs shrinkers to new scan/count API")
Cc: stable@vger.kernel.org # 3.12+
Signed-off-by: default avatarZhang Yi <yi.zhang@huawei.com>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210522103045.690103-3-yi.zhang@huawei.com


Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent e5e7010e

fs/ext4/extents_status.c

+1 −0
Original line number Diff line number Diff line
@@ -1576,6 +1576,7 @@ static unsigned long ext4_es_scan(struct shrinker *shrink, 


	nr_shrunk = __es_shrink(sbi, nr_to_scan, NULL);



	ret = percpu_counter_read_positive(&sbi->s_es_stats.es_stats_shk_cnt);

	trace_ext4_es_shrink_scan_exit(sbi->s_sb, nr_shrunk, ret);

	return nr_shrunk;

}