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authorTejun Heo <tj@kernel.org>2019-07-16 17:58:31 +0300
committerJens Axboe <axboe@kernel.dk>2019-07-16 19:06:39 +0300
commit07b0fdecb2477396bcb69609019aade2b22124a1 (patch)
treeb554d081cf839d5d04679b62db42decb4e0cc517 /block/blk-iolatency.c
parentf7b76ac9d17e16e44feebb6d2749fec92bfd6dd4 (diff)
downloadlinux-07b0fdecb2477396bcb69609019aade2b22124a1.tar.xz
blkcg: allow blkcg_policy->pd_stat() to print non-debug info too
Currently, ->pd_stat() is called only when moduleparam blkcg_debug_stats is set which prevents it from printing non-debug policy-specific statistics. Let's move debug testing down so that ->pd_stat() can print non-debug stat too. This patch doesn't cause any visible behavior change. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-iolatency.c')
-rw-r--r--block/blk-iolatency.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index d973c38ee4fd..0fff7b56df0e 100644
--- a/block/blk-iolatency.c
+++ b/block/blk-iolatency.c
@@ -917,6 +917,9 @@ static size_t iolatency_pd_stat(struct blkg_policy_data *pd, char *buf,
unsigned long long avg_lat;
unsigned long long cur_win;
+ if (!blkcg_debug_stats)
+ return 0;
+
if (iolat->ssd)
return iolatency_ssd_stat(iolat, buf, size);