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ext4: improve extents status tree trace point

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This commit improves the trace point of extents status tree.  We rename
trace_ext4_es_shrink_enter in ext4_es_count() because it is also used
in ext4_es_scan() and we can not identify them from the result.

Further this commit fixes a variable name in trace point in order to
keep consistency with others.

Cc: Andreas Dilger <[email protected]>
Cc: Jan Kara <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Signed-off-by: Zheng Liu <[email protected]>
Signed-off-by: Theodore Ts'o <[email protected]>
This commit is contained in:
Zheng Liu 2014-09-01 22:22:13 -04:00 • committed by Theodore Ts'o
commit e963bb1de4
2 changed files with 23 additions and 11 deletions
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6
fs/ext4/extents_status.c
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@ -1019,7 +1019,7 @@ static unsigned long ext4_es_count(struct shrinker *shrink,
sbi = container_of(shrink, struct ext4_sb_info, s_es_shrinker);
nr = percpu_counter_read_positive(&sbi->s_extent_cache_cnt);
trace_ext4_es_shrink_enter(sbi->s_sb, sc->nr_to_scan, nr);
trace_ext4_es_shrink_count(sbi->s_sb, sc->nr_to_scan, nr);
return nr;
}
@ -1032,14 +1032,14 @@ static unsigned long ext4_es_scan(struct shrinker *shrink,
int ret, nr_shrunk;
ret = percpu_counter_read_positive(&sbi->s_extent_cache_cnt);
trace_ext4_es_shrink_enter(sbi->s_sb, nr_to_scan, ret);
trace_ext4_es_shrink_scan_enter(sbi->s_sb, nr_to_scan, ret);
if (!nr_to_scan)
return ret;
nr_shrunk = __ext4_es_shrink(sbi, nr_to_scan, NULL);
trace_ext4_es_shrink_exit(sbi->s_sb, nr_shrunk, ret);
trace_ext4_es_shrink_scan_exit(sbi->s_sb, nr_shrunk, ret);
return nr_shrunk;
}