From: Sage Weil <sage@redhat.com>
Date: Thu, 26 Apr 2018 18:20:40 +0000 (-0500)
Subject: osd: log 'slow op' debug messages for individual slow ops
X-Git-Tag: v13.1.0~5^2~5
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=126ffe616562d1f37073e5940789abbe5d320917;p=ceph.git

osd: log 'slow op' debug messages for individual slow ops

Otherwise it is very hard to identify which OSD ops are slow when we've
seen a SLOW_OPS health warning in a qa run.

Notably, without this, bugs like http://tracker.ceph.com/issues/23769
are very challenging to track down.

Signed-off-by: Sage Weil <sage@redhat.com>
---

diff --git a/src/osd/OSD.cc b/src/osd/OSD.cc
index 1285c22dce15b..b801b63c795a1 100644
--- a/src/osd/OSD.cc
+++ b/src/osd/OSD.cc
@@ -7011,6 +7011,9 @@ vector<DaemonHealthMetric> OSD::get_health_metrics()
     int slow = 0;
     auto count_slow_ops = [&](TrackedOp& op) {
       if (op.get_initiated() < too_old) {
+	lgeneric_subdout(cct,osd,20) << "slow op " << op.get_desc()
+	                             << " initiated "
+	                             << op.get_initiated() << dendl;
 	slow++;
 	return true;
       } else {