LU-16501 tgt: add qos debug

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.

Test-Parameters: trivial
Signed-off-by: Sergey Cheremencev <scherementsev@ddn.com>
Change-Id: I2dd53022d7f199e7c521bbf78acc4a8bf4abca51
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/49977
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>

diff --git a/lustre/obdclass/lu_tgt_descs.c b/lustre/obdclass/lu_tgt_descs.c
index 57d93c9..df0d115 100644 (file)
--- a/lustre/obdclass/lu_tgt_descs.c
+++ b/lustre/obdclass/lu_tgt_descs.c
@@ -30,7 +30,7 @@
  *
  */
 
-#define DEBUG_SUBSYSTEM S_CLASS
+#define DEBUG_SUBSYSTEM S_LOV
 
 #include <linux/module.h>
 #include <linux/list.h>
@@ -226,6 +226,8 @@ 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
@@ -633,8 +635,15 @@ 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) {