* [RFC PATCH 18/39] blktrace: update blk_add_trace_bio_frontmerge()
@ 2020-03-23 16:30 Chaitanya Kulkarni
0 siblings, 0 replies; 2+ messages in thread
From: Chaitanya Kulkarni @ 2020-03-23 16:30 UTC (permalink / raw)
To: linux-btrace
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
kernel/trace/blktrace.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index cda8e5eaf522..f77aa0c72b6b 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -1328,7 +1328,25 @@ static void blk_add_trace_bio_frontmerge(void *ignore,
struct request *rq,
struct bio *bio)
{
- blk_add_trace_bio(q, bio, BLK_TA_FRONTMERGE, 0);
+ u64 ta = 0;
+ 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;
+ }
+ rcu_read_unlock();
+
+ if (bt) {
+ ta = BLK_TA_FRONTMERGE;
+ } else if (bte) {
+ ta = BLK_TA_FRONTMERGE_EXT;
+ }
+ blk_add_trace_bio(q, bio, ta, 0);
}
static void blk_add_trace_bio_queue(void *ignore,
--
2.22.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [RFC PATCH 18/39] blktrace: update blk_add_trace_bio_frontmerge()
@ 2019-11-20 4:24 Chaitanya Kulkarni
0 siblings, 0 replies; 2+ messages in thread
From: Chaitanya Kulkarni @ 2019-11-20 4:24 UTC (permalink / raw)
To: linux-btrace
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
kernel/trace/blktrace.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 342209658b22..96d4452d922d 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -1236,7 +1236,14 @@ static void blk_add_trace_bio_frontmerge(void *ignore,
struct request *rq,
struct bio *bio)
{
- blk_add_trace_bio(q, bio, BLK_TA_FRONTMERGE, 0);
+ u64 ta = 0;
+
+ if (q->blk_trace) {
+ ta = BLK_TA_FRONTMERGE;
+ } else if (q->blk_trace_ext) {
+ ta = BLK_TA_FRONTMERGE_EXT;
+ }
+ blk_add_trace_bio(q, bio, ta, 0);
}
static void blk_add_trace_bio_queue(void *ignore,
--
2.22.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
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