From: Byungchul Park <byungchul.park@lge.com>
To: linux-kernel@vger.kernel.org
Cc: torvalds@linux-foundation.org, damien.lemoal@opensource.wdc.com,
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Subject: [PATCH RFC v7 13/23] dept: Distinguish each work from another
Date: Mon, 9 Jan 2023 12:33:41 +0900 [thread overview]
Message-ID: <1673235231-30302-14-git-send-email-byungchul.park@lge.com> (raw)
In-Reply-To: <1673235231-30302-1-git-send-email-byungchul.park@lge.com>
Workqueue already provides concurrency control. By that, any wait in a
work doesn't prevents events in other works with the control enabled.
Thus, each work would better be considered a different context.
So let Dept assign a different context id to each work.
Signed-off-by: Byungchul Park <byungchul.park@lge.com>
---
include/linux/dept.h | 2 ++
kernel/dependency/dept.c | 10 ++++++++++
kernel/workqueue.c | 3 +++
3 files changed, 15 insertions(+)
diff --git a/include/linux/dept.h b/include/linux/dept.h
index 777c837..625c645 100644
--- a/include/linux/dept.h
+++ b/include/linux/dept.h
@@ -515,6 +515,7 @@ struct dept_task {
extern void dept_sched_enter(void);
extern void dept_sched_exit(void);
extern void dept_kernel_enter(void);
+extern void dept_work_enter(void);
static inline void dept_ecxt_enter_nokeep(struct dept_map *m)
{
@@ -565,6 +566,7 @@ static inline void dept_ecxt_enter_nokeep(struct dept_map *m)
#define dept_sched_enter() do { } while (0)
#define dept_sched_exit() do { } while (0)
#define dept_kernel_enter() do { } while (0)
+#define dept_work_enter() do { } while (0)
#define dept_ecxt_enter_nokeep(m) do { } while (0)
#define dept_key_init(k) do { (void)(k); } while (0)
#define dept_key_destroy(k) do { (void)(k); } while (0)
diff --git a/kernel/dependency/dept.c b/kernel/dependency/dept.c
index e98617b..2f215c2 100644
--- a/kernel/dependency/dept.c
+++ b/kernel/dependency/dept.c
@@ -1954,6 +1954,16 @@ void dept_hardirqs_off(unsigned long ip)
}
EXPORT_SYMBOL_GPL(dept_hardirqs_off);
+/*
+ * Assign a different context id to each work.
+ */
+void dept_work_enter(void)
+{
+ struct dept_task *dt = dept_task();
+
+ dt->cxt_id[DEPT_CXT_PROCESS] += 1UL << DEPT_CXTS_NR;
+}
+
void dept_kernel_enter(void)
{
struct dept_task *dt = dept_task();
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 07895de..69c4f46 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -51,6 +51,7 @@
#include <linux/sched/isolation.h>
#include <linux/nmi.h>
#include <linux/kvm_para.h>
+#include <linux/dept.h>
#include "workqueue_internal.h"
@@ -2199,6 +2200,8 @@ static void process_one_work(struct worker *worker, struct work_struct *work)
lockdep_copy_map(&lockdep_map, &work->lockdep_map);
#endif
+ dept_work_enter();
+
/* ensure we're on the correct CPU */
WARN_ON_ONCE(!(pool->flags & POOL_DISASSOCIATED) &&
raw_smp_processor_id() != pool->cpu);
--
1.9.1
next prev parent reply other threads:[~2023-01-09 4:06 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-09 3:33 [PATCH RFC v7 00/23] DEPT(Dependency Tracker) Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 01/23] llist: Move llist_{head,node} definition to types.h Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 02/23] dept: Implement Dept(Dependency Tracker) Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 03/23] dept: Add single event dependency tracker APIs Byungchul Park
2023-01-18 13:01 ` Thomas Gleixner
2023-01-09 3:33 ` [PATCH RFC v7 04/23] dept: Add lock " Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 05/23] dept: Tie to Lockdep and IRQ tracing Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 06/23] dept: Add proc knobs to show stats and dependency graph Byungchul Park
2023-01-18 12:56 ` Thomas Gleixner
2023-01-09 3:33 ` [PATCH RFC v7 07/23] dept: Apply sdt_might_sleep_strong() to wait_for_completion()/complete() Byungchul Park
2023-01-18 12:59 ` Thomas Gleixner
2023-01-09 3:33 ` [PATCH RFC v7 08/23] dept: Apply sdt_might_sleep_strong() to PG_{locked,writeback} wait Byungchul Park
2023-01-09 9:10 ` Sergey Shtylyov
2023-01-09 3:33 ` [PATCH RFC v7 09/23] dept: Apply sdt_might_sleep_weak() to swait Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 10/23] dept: Apply sdt_might_sleep_weak() to waitqueue wait Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 11/23] dept: Apply sdt_might_sleep_weak() to hashed-waitqueue wait Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 12/23] dept: Distinguish each syscall context from another Byungchul Park
2023-01-09 3:33 ` Byungchul Park [this message]
2023-01-09 3:33 ` [PATCH RFC v7 14/23] dept: Add a mechanism to refill the internal memory pools on running out Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 15/23] locking/lockdep, cpu/hotplus: Use a weaker annotation in AP thread Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 16/23] dept: Apply sdt_might_sleep_strong() to dma fence wait Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 17/23] dept: Track timeout waits separately with a new Kconfig Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 18/23] dept: Apply timeout consideration to wait_for_completion()/complete() Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 19/23] dept: Apply timeout consideration to swait Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 20/23] dept: Apply timeout consideration to waitqueue wait Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 21/23] dept: Apply timeout consideration to hashed-waitqueue wait Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 22/23] dept: Apply timeout consideration to dma fence wait Byungchul Park
2023-01-09 3:33 ` [PATCH RFC v7 23/23] dept: Record the latest one out of consecutive waits of the same class Byungchul Park
2023-01-16 18:00 ` [PATCH RFC v7 00/23] DEPT(Dependency Tracker) Linus Torvalds
2023-01-17 18:18 ` Boqun Feng
2023-01-17 18:40 ` Waiman Long
2023-01-18 12:55 ` Thomas Gleixner
2023-01-19 9:05 ` Byungchul Park
2023-01-19 6:23 ` Byungchul Park
2023-01-19 7:06 ` Byungchul Park
2023-01-19 13:33 ` Matthew Wilcox
2023-01-19 19:25 ` Boqun Feng
2023-01-20 1:51 ` Byungchul Park
2023-01-20 2:23 ` Boqun Feng
2023-01-20 3:07 ` Boqun Feng
2023-01-20 3:26 ` Boqun Feng
2023-01-21 3:28 ` Byungchul Park
2023-01-21 3:44 ` Boqun Feng
2023-01-21 4:01 ` Boqun Feng
2023-01-21 4:47 ` Byungchul Park
2023-01-19 0:58 ` Byungchul Park
2023-01-21 2:40 ` Byungchul Park
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