From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
To: linux-btrace@vger.kernel.org
Subject: [RFC PATCH 20/38] blktrace: update blk_add_trace_plug()
Date: Tue, 26 Jan 2021 23:33:42 +0000 [thread overview]
Message-ID: <20210126233400.31259-21-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 674b5ca75d0d..76266a881ca0 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -1421,11 +1421,20 @@ static void blk_add_trace_getrq(void *ignore, struct bio *bio)
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();
}
--
2.22.1
reply other threads:[~2021-01-26 23:33 UTC|newest]
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