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From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
To: linux-btrace@vger.kernel.org
Subject: [RFC PATCH 22/39] blktrace: update blk_add_trace_plug()
Date: Mon, 23 Mar 2020 16:30:05 +0000	[thread overview]
Message-ID: <20200323163022.30688-23-chaitanya.kulkarni@wdc.com> (raw)

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
 kernel/trace/blktrace.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index a95ed09990e1..1007082d28f2 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -1453,11 +1453,20 @@ static void blk_add_trace_sleeprq(void *ignore,
 static void blk_add_trace_plug(void *ignore, struct request_queue *q)
 {
 	struct blk_trace *bt;
+	struct blk_trace_ext *bte;
 
 	rcu_read_lock();
 	bt = rcu_dereference(q->blk_trace);
+	bte = rcu_dereference(q->blk_trace_ext);
+	if (likely(!bt) && likely(!bte)) {
+		rcu_read_unlock();
+		return;
+	}
 	if (bt)
 		__blk_add_trace(bt, 0, 0, 0, 0, BLK_TA_PLUG, 0, 0, NULL, 0);
+	else if (bte)
+		__blk_add_trace_ext(bte, 0, 0, 0, 0, BLK_TA_PLUG_EXT, 0, 0,
+				    NULL, 0, 0);
 	rcu_read_unlock();
 }
 
-- 
2.22.0

             reply	other threads:[~2020-03-23 16:30 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-23 16:30 Chaitanya Kulkarni [this message]
  -- strict thread matches above, loose matches on Subject: below --
2019-11-20  4:24 [RFC PATCH 22/39] blktrace: update blk_add_trace_plug() Chaitanya Kulkarni

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