From: Byungchul Park <byungchul.park@lge.com>
To: torvalds@linux-foundation.org
Cc: damien.lemoal@opensource.wdc.com, linux-ide@vger.kernel.org,
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Subject: [PATCH v3 14/21] dept: Apply SDT to swait
Date: Mon, 28 Feb 2022 18:56:53 +0900 [thread overview]
Message-ID: <1646042220-28952-15-git-send-email-byungchul.park@lge.com> (raw)
In-Reply-To: <1646042220-28952-1-git-send-email-byungchul.park@lge.com>
Makes SDT able to track dependencies by swait.
Signed-off-by: Byungchul Park <byungchul.park@lge.com>
---
include/linux/swait.h | 4 ++++
kernel/sched/swait.c | 10 ++++++++++
2 files changed, 14 insertions(+)
diff --git a/include/linux/swait.h b/include/linux/swait.h
index 6a8c22b..dbdf2ce 100644
--- a/include/linux/swait.h
+++ b/include/linux/swait.h
@@ -6,6 +6,7 @@
#include <linux/stddef.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
+#include <linux/dept_sdt.h>
#include <asm/current.h>
/*
@@ -43,6 +44,7 @@
struct swait_queue_head {
raw_spinlock_t lock;
struct list_head task_list;
+ struct dept_map dmap;
};
struct swait_queue {
@@ -61,6 +63,7 @@ struct swait_queue {
#define __SWAIT_QUEUE_HEAD_INITIALIZER(name) { \
.lock = __RAW_SPIN_LOCK_UNLOCKED(name.lock), \
.task_list = LIST_HEAD_INIT((name).task_list), \
+ .dmap = DEPT_SDT_MAP_INIT(name), \
}
#define DECLARE_SWAIT_QUEUE_HEAD(name) \
@@ -72,6 +75,7 @@ extern void __init_swait_queue_head(struct swait_queue_head *q, const char *name
#define init_swait_queue_head(q) \
do { \
static struct lock_class_key __key; \
+ sdt_map_init(&(q)->dmap); \
__init_swait_queue_head((q), #q, &__key); \
} while (0)
diff --git a/kernel/sched/swait.c b/kernel/sched/swait.c
index e1c655f..4ca7d6e 100644
--- a/kernel/sched/swait.c
+++ b/kernel/sched/swait.c
@@ -27,6 +27,7 @@ void swake_up_locked(struct swait_queue_head *q)
return;
curr = list_first_entry(&q->task_list, typeof(*curr), task_list);
+ sdt_event(&q->dmap);
wake_up_process(curr->task);
list_del_init(&curr->task_list);
}
@@ -69,6 +70,7 @@ void swake_up_all(struct swait_queue_head *q)
while (!list_empty(&tmp)) {
curr = list_first_entry(&tmp, typeof(*curr), task_list);
+ sdt_event(&q->dmap);
wake_up_state(curr->task, TASK_NORMAL);
list_del_init(&curr->task_list);
@@ -97,6 +99,9 @@ void prepare_to_swait_exclusive(struct swait_queue_head *q, struct swait_queue *
__prepare_to_swait(q, wait);
set_current_state(state);
raw_spin_unlock_irqrestore(&q->lock, flags);
+
+ if (state & TASK_NORMAL)
+ sdt_wait_prepare(&q->dmap);
}
EXPORT_SYMBOL(prepare_to_swait_exclusive);
@@ -119,12 +124,16 @@ long prepare_to_swait_event(struct swait_queue_head *q, struct swait_queue *wait
}
raw_spin_unlock_irqrestore(&q->lock, flags);
+ if (!ret && state & TASK_NORMAL)
+ sdt_wait_prepare(&q->dmap);
+
return ret;
}
EXPORT_SYMBOL(prepare_to_swait_event);
void __finish_swait(struct swait_queue_head *q, struct swait_queue *wait)
{
+ sdt_wait_finish();
__set_current_state(TASK_RUNNING);
if (!list_empty(&wait->task_list))
list_del_init(&wait->task_list);
@@ -134,6 +143,7 @@ void finish_swait(struct swait_queue_head *q, struct swait_queue *wait)
{
unsigned long flags;
+ sdt_wait_finish();
__set_current_state(TASK_RUNNING);
if (!list_empty_careful(&wait->task_list)) {
--
1.9.1
next prev parent reply other threads:[~2022-02-28 9:59 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-28 9:56 [PATCH v3 00/21] DEPT(Dependency Tracker) Byungchul Park
2022-02-28 9:56 ` [PATCH v3 01/21] llist: Move llist_{head,node} definition to types.h Byungchul Park
2022-02-28 9:56 ` [PATCH v3 02/21] dept: Implement Dept(Dependency Tracker) Byungchul Park
2022-02-28 9:56 ` [PATCH v3 03/21] dept: Embed Dept data in Lockdep Byungchul Park
2022-02-28 9:56 ` [PATCH v3 04/21] dept: Add a API for skipping dependency check temporarily Byungchul Park
2022-02-28 9:56 ` [PATCH v3 05/21] dept: Apply Dept to spinlock Byungchul Park
2022-02-28 9:56 ` [PATCH v3 06/21] dept: Apply Dept to mutex families Byungchul Park
2022-02-28 9:56 ` [PATCH v3 07/21] dept: Apply Dept to rwlock Byungchul Park
2022-02-28 9:56 ` [PATCH v3 08/21] dept: Apply Dept to wait_for_completion()/complete() Byungchul Park
2022-02-28 9:56 ` [PATCH v3 09/21] dept: Apply Dept to seqlock Byungchul Park
2022-02-28 9:56 ` [PATCH v3 10/21] dept: Apply Dept to rwsem Byungchul Park
2022-02-28 9:56 ` [PATCH v3 11/21] dept: Add proc knobs to show stats and dependency graph Byungchul Park
2022-02-28 9:56 ` [PATCH v3 12/21] dept: Introduce split map concept and new APIs for them Byungchul Park
2022-02-28 9:56 ` [PATCH v3 13/21] dept: Apply Dept to wait/event of PG_{locked,writeback} Byungchul Park
2022-02-28 9:56 ` Byungchul Park [this message]
2022-02-28 9:56 ` [PATCH v3 15/21] dept: Apply SDT to wait(waitqueue) Byungchul Park
2022-02-28 9:56 ` [PATCH v3 16/21] locking/lockdep, cpu/hotplus: Use a weaker annotation in AP thread Byungchul Park
2022-02-28 9:56 ` [PATCH v3 17/21] dept: Distinguish each syscall context from another Byungchul Park
2022-02-28 9:56 ` [PATCH v3 18/21] dept: Distinguish each work " Byungchul Park
2022-02-28 9:56 ` [PATCH v3 19/21] dept: Disable Dept within the wait_bit layer by default Byungchul Park
2022-02-28 9:56 ` [PATCH v3 20/21] dept: Add nocheck version of init_completion() Byungchul Park
2022-02-28 9:57 ` [PATCH v3 21/21] dept: Disable Dept on struct crypto_larval's completion for now Byungchul Park
2022-03-02 4:36 ` [PATCH v3 00/21] DEPT(Dependency Tracker) Hyeonggon Yoo
2022-03-02 4:53 ` Hyeonggon Yoo
2022-03-03 0:18 ` Byungchul Park
2022-03-03 8:03 ` Hyeonggon Yoo
2022-03-03 9:48 ` Byungchul Park
2022-03-03 12:38 ` Hyeonggon Yoo
2022-03-04 0:28 ` Byungchul Park
2022-03-03 2:22 ` Byungchul Park
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