[lustre-devel] [PATCH 37/40] lustre: tgt: add qos debug

From: Sergey Cheremencev <[email protected]>

Add several debug lines for QOS allocator.
Patch also changes S_CLASS subsystem to S_LOV in
lu_tgt_desc_tgt.c thus it can be enabled to capture
only QOS debugging.

WC-bug-id: https://jira.whamcloud.com/browse/LU-16501
Lustre-commit: 5fe45f0ff98064561 ("LU-16501 tgt: add qos debug")
Signed-off-by: Sergey Cheremencev <[email protected]>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/49977
Reviewed-by: Andreas Dilger <[email protected]>
Reviewed-by: Alex Zhuravlev <[email protected]>
Reviewed-by: Oleg Drokin <[email protected]>
Signed-off-by: James Simmons <[email protected]>
---
 fs/lustre/obdclass/lu_tgt_descs.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/fs/lustre/obdclass/lu_tgt_descs.c b/fs/lustre/obdclass/lu_tgt_descs.c
index 35e7c7c..d573c12 100644
--- a/fs/lustre/obdclass/lu_tgt_descs.c
+++ b/fs/lustre/obdclass/lu_tgt_descs.c
@@ -31,7 +31,7 @@
  *
  */
 
-#define DEBUG_SUBSYSTEM S_CLASS
+#define DEBUG_SUBSYSTEM S_LOV
 
 #include <linux/module.h>
 #include <linux/list.h>
@@ -219,6 +219,8 @@ void lu_tgt_qos_weight_calc(struct lu_tgt_desc *tgt, bool is_mdt)
 	else
 		ltq->ltq_avail = tgt_statfs_bavail(tgt) >> 8;
 	penalty = ltq->ltq_penalty + ltq->ltq_svr->lsq_penalty;
+	CDEBUG(D_OTHER, "ltq_penalty: %llu lsq_penalty: %llu tgt_bavail: %llu\n",
+		  ltq->ltq_penalty, ltq->ltq_svr->lsq_penalty, ltq->ltq_avail);
 	if (ltq->ltq_avail < penalty)
 		ltq->ltq_weight = 0;
 	else
@@ -623,8 +625,15 @@ int ltd_qos_update(struct lu_tgt_descs *ltd, struct lu_tgt_desc *tgt,
 	/* Set max penalties for this tgt and server */
 	ltq->ltq_penalty += ltq->ltq_penalty_per_obj *
 			    ltd->ltd_lov_desc.ld_active_tgt_count;
+	CDEBUG(D_OTHER, "ltq_penalty: %llu per_obj: %llu tgt_count: %d\n",
+	       ltq->ltq_penalty, ltq->ltq_penalty_per_obj,
+	       ltd->ltd_lov_desc.ld_active_tgt_count);
 	svr->lsq_penalty += svr->lsq_penalty_per_obj *
 			    qos->lq_active_svr_count;
+	CDEBUG(D_OTHER, "lsq_penalty: %llu per_obj: %llu srv_count: %d\n",
+	       svr->lsq_penalty, svr->lsq_penalty_per_obj,
+	       qos->lq_active_svr_count);
+
 
 	/* Decrease all MDS penalties */
 	list_for_each_entry(svr, &qos->lq_svr_list, lsq_svr_list) {
-- 
1.8.3.1

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