@@ -36,7 +36,7 @@ struct completion {
#define dept_wfc_wait(m, ip) \
do { \
dept_ask_event(m); \
- dept_wait(m, 1UL, ip, __func__, 0); \
+ dept_wait(m, 1UL, ip, __func__, 0, true); \
} while (0)
#define dept_wfc_complete(m, ip) dept_event(m, 1UL, ip, __func__)
#define dept_wfc_enter(m, ip) dept_ecxt_enter(m, 1UL, ip, "completion_context_enter", "complete", 0)
@@ -170,6 +170,11 @@ struct dept_ecxt {
*/
unsigned long event_ip;
struct dept_stack *event_stack;
+
+ /*
+ * whether the event is triggered within __schedule()
+ */
+ bool in_sched;
};
struct dept_wait {
@@ -208,6 +213,11 @@ struct dept_wait {
*/
unsigned long wait_ip;
struct dept_stack *wait_stack;
+
+ /*
+ * spin or sleep
+ */
+ bool sleep;
};
struct dept_dep {
@@ -460,6 +470,11 @@ struct dept_task {
*/
bool hardirqs_enabled;
bool softirqs_enabled;
+
+ /*
+ * whether the current task is in __schedule()
+ */
+ bool in_sched;
};
#define DEPT_TASK_INITIALIZER(t) \
@@ -480,6 +495,7 @@ struct dept_task {
.missing_ecxt = 0, \
.hardirqs_enabled = false, \
.softirqs_enabled = false, \
+ .in_sched = false, \
}
extern void dept_on(void);
@@ -492,7 +508,7 @@ struct dept_task {
extern void dept_map_reinit(struct dept_map *m);
extern void dept_map_nocheck(struct dept_map *m);
-extern void dept_wait(struct dept_map *m, unsigned long w_f, unsigned long ip, const char *w_fn, int ne);
+extern void dept_wait(struct dept_map *m, unsigned long w_f, unsigned long ip, const char *w_fn, int ne, bool sleep);
extern void dept_stage_wait(struct dept_map *m, unsigned long w_f, const char *w_fn, int ne);
extern void dept_ask_event_wait_commit(unsigned long ip);
extern void dept_clean_stage(void);
@@ -502,11 +518,13 @@ struct dept_task {
extern void dept_ecxt_exit(struct dept_map *m, unsigned long e_f, unsigned long ip);
extern void dept_split_map_each_init(struct dept_map_each *me);
extern void dept_split_map_common_init(struct dept_map_common *mc, struct dept_key *k, const char *n);
-extern void dept_wait_split_map(struct dept_map_each *me, struct dept_map_common *mc, unsigned long ip, const char *w_fn, int ne);
+extern void dept_wait_split_map(struct dept_map_each *me, struct dept_map_common *mc, unsigned long ip, const char *w_fn, int ne, bool sleep);
extern void dept_event_split_map(struct dept_map_each *me, struct dept_map_common *mc, unsigned long ip, const char *e_fn);
extern void dept_ask_event_split_map(struct dept_map_each *me, struct dept_map_common *mc);
extern void dept_kernel_enter(void);
extern void dept_work_enter(void);
+extern void dept_sched_enter(void);
+extern void dept_sched_exit(void);
static inline void dept_ecxt_enter_nokeep(struct dept_map *m)
{
@@ -546,7 +564,7 @@ static inline void dept_ecxt_enter_nokeep(struct dept_map *m)
#define dept_map_reinit(m) do { } while (0)
#define dept_map_nocheck(m) do { } while (0)
-#define dept_wait(m, w_f, ip, w_fn, ne) do { (void)(w_fn); } while (0)
+#define dept_wait(m, w_f, ip, w_fn, ne, s) do { (void)(w_fn); } while (0)
#define dept_stage_wait(m, w_f, w_fn, ne) do { (void)(w_fn); } while (0)
#define dept_ask_event_wait_commit(ip) do { } while (0)
#define dept_clean_stage() do { } while (0)
@@ -556,11 +574,13 @@ static inline void dept_ecxt_enter_nokeep(struct dept_map *m)
#define dept_ecxt_exit(m, e_f, ip) do { } while (0)
#define dept_split_map_each_init(me) do { } while (0)
#define dept_split_map_common_init(mc, k, n) do { (void)(n); (void)(k); } while (0)
-#define dept_wait_split_map(me, mc, ip, w_fn, ne) do { } while (0)
+#define dept_wait_split_map(me, mc, ip, w_fn, ne, s) do { } while (0)
#define dept_event_split_map(me, mc, ip, e_fn) do { } while (0)
#define dept_ask_event_split_map(me, mc) do { } while (0)
#define dept_kernel_enter() do { } while (0)
#define dept_work_enter() do { } while (0)
+#define dept_sched_enter() do { } while (0)
+#define dept_sched_exit() 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)
@@ -20,7 +20,7 @@
\
if (likely(me)) \
dept_wait_split_map(me, &pglocked_mc, _RET_IP_, \
- __func__, 0); \
+ __func__, 0, true); \
} while (0)
#define dept_pglocked_set_bit(f) \
@@ -46,7 +46,7 @@
\
if (likely(me)) \
dept_wait_split_map(me, &pgwriteback_mc, _RET_IP_,\
- __func__, 0); \
+ __func__, 0, true); \
} while (0)
#define dept_pgwriteback_set_bit(f) \
@@ -29,7 +29,13 @@
#define sdt_wait(m) \
do { \
dept_ask_event(m); \
- dept_wait(m, 1UL, _THIS_IP_, "wait", 0); \
+ dept_wait(m, 1UL, _THIS_IP_, "wait", 0, true); \
+ } while (0)
+
+#define sdt_wait_spin(m) \
+ do { \
+ dept_ask_event(m); \
+ dept_wait(m, 1UL, _THIS_IP_, "wait", 0, false); \
} while (0)
/*
* This will be committed in __schedule() when it actually gets to
@@ -47,6 +53,7 @@
#define sdt_map_init(m) do { } while (0)
#define sdt_map_init_key(m, k) do { (void)(k); } while (0)
#define sdt_wait(m) do { } while (0)
+#define sdt_wait_spin(m) do { } while (0)
#define sdt_wait_prepare(m) do { } while (0)
#define sdt_wait_finish() do { } while (0)
#define sdt_ecxt_enter(m) do { } while (0)
@@ -575,12 +575,12 @@ static inline void print_irqtrace_events(struct task_struct *curr)
#define spin_acquire(l, s, t, i) \
do { \
lock_acquire_exclusive(l, s, t, NULL, i); \
- dept_spin_lock(&(l)->dmap, s, t, NULL, "spin_unlock", i); \
+ dept_spin_lock(&(l)->dmap, s, t, NULL, "spin_unlock", i, false);\
} while (0)
#define spin_acquire_nest(l, s, t, n, i) \
do { \
lock_acquire_exclusive(l, s, t, n, i); \
- dept_spin_lock(&(l)->dmap, s, t, (n) ? &(n)->dmap : NULL, "spin_unlock", i); \
+ dept_spin_lock(&(l)->dmap, s, t, (n) ? &(n)->dmap : NULL, "spin_unlock", i, false); \
} while (0)
#define spin_release(l, i) \
do { \
@@ -591,16 +591,16 @@ static inline void print_irqtrace_events(struct task_struct *curr)
#define rwlock_acquire(l, s, t, i) \
do { \
lock_acquire_exclusive(l, s, t, NULL, i); \
- dept_rwlock_wlock(&(l)->dmap, s, t, NULL, "write_unlock", i); \
+ dept_rwlock_wlock(&(l)->dmap, s, t, NULL, "write_unlock", i, false);\
} while (0)
#define rwlock_acquire_read(l, s, t, i) \
do { \
if (read_lock_is_recursive()) { \
lock_acquire_shared_recursive(l, s, t, NULL, i); \
- dept_rwlock_rlock(&(l)->dmap, s, t, NULL, "read_unlock", i, 0);\
+ dept_rwlock_rlock(&(l)->dmap, s, t, NULL, "read_unlock", i, 0, false);\
} else { \
lock_acquire_shared(l, s, t, NULL, i); \
- dept_rwlock_rlock(&(l)->dmap, s, t, NULL, "read_unlock", i, 1);\
+ dept_rwlock_rlock(&(l)->dmap, s, t, NULL, "read_unlock", i, 1, false);\
} \
} while (0)
#define rwlock_release(l, i) \
@@ -614,6 +614,48 @@ static inline void print_irqtrace_events(struct task_struct *curr)
dept_rwlock_runlock(&(l)->dmap, i); \
} while (0)
+#define rt_spin_acquire(l, s, t, i) \
+do { \
+ lock_acquire_exclusive(l, s, t, NULL, i); \
+ dept_spin_lock(&(l)->dmap, s, t, NULL, "spin_unlock", i, true); \
+} while (0)
+#define rt_spin_acquire_nest(l, s, t, n, i) \
+do { \
+ lock_acquire_exclusive(l, s, t, n, i); \
+ dept_spin_lock(&(l)->dmap, s, t, (n) ? &(n)->dmap : NULL, "spin_unlock", i, true);\
+} while (0)
+#define rt_spin_release(l, i) \
+do { \
+ lock_release(l, i); \
+ dept_spin_unlock(&(l)->dmap, i); \
+} while (0)
+
+#define rt_rwlock_acquire(l, s, t, i) \
+do { \
+ lock_acquire_exclusive(l, s, t, NULL, i); \
+ dept_rwlock_wlock(&(l)->dmap, s, t, NULL, "write_unlock", i, true);\
+} while (0)
+#define rt_rwlock_acquire_read(l, s, t, i) \
+do { \
+ if (read_lock_is_recursive()) { \
+ lock_acquire_shared_recursive(l, s, t, NULL, i); \
+ dept_rwlock_rlock(&(l)->dmap, s, t, NULL, "read_unlock", i, 0, true);\
+ } else { \
+ lock_acquire_shared(l, s, t, NULL, i); \
+ dept_rwlock_rlock(&(l)->dmap, s, t, NULL, "read_unlock", i, 1, true);\
+ } \
+} while (0)
+#define rt_rwlock_release(l, i) \
+do { \
+ lock_release(l, i); \
+ dept_rwlock_wunlock(&(l)->dmap, i); \
+} while (0)
+#define rt_rwlock_release_read(l, i) \
+do { \
+ lock_release(l, i); \
+ dept_rwlock_runlock(&(l)->dmap, i); \
+} while (0)
+
#define seqcount_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
#define seqcount_acquire_read(l, s, t, i) lock_acquire_shared_recursive(l, s, t, NULL, i)
#define seqcount_release(l, i) lock_release(l, i)
@@ -84,7 +84,7 @@ struct mutex {
} else if (n) { \
dept_ecxt_enter_nokeep(m); \
} else { \
- dept_wait(m, 1UL, ip, __func__, ne); \
+ dept_wait(m, 1UL, ip, __func__, ne, true); \
dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne); \
} \
} while (0)
@@ -33,25 +33,25 @@
#define DEPT_EVT_RWLOCK_W (1UL << 1)
#define DEPT_EVT_RWLOCK_RW (DEPT_EVT_RWLOCK_R | DEPT_EVT_RWLOCK_W)
-#define dept_rwlock_wlock(m, ne, t, n, e_fn, ip) \
+#define dept_rwlock_wlock(m, ne, t, n, e_fn, ip, s) \
do { \
if (t) { \
dept_ecxt_enter(m, DEPT_EVT_RWLOCK_W, ip, __func__, e_fn, ne);\
} else if (n) { \
dept_ecxt_enter_nokeep(m); \
} else { \
- dept_wait(m, DEPT_EVT_RWLOCK_RW, ip, __func__, ne); \
+ dept_wait(m, DEPT_EVT_RWLOCK_RW, ip, __func__, ne, s); \
dept_ecxt_enter(m, DEPT_EVT_RWLOCK_W, ip, __func__, e_fn, ne);\
} \
} while (0)
-#define dept_rwlock_rlock(m, ne, t, n, e_fn, ip, q) \
+#define dept_rwlock_rlock(m, ne, t, n, e_fn, ip, q, s) \
do { \
if (t) { \
dept_ecxt_enter(m, DEPT_EVT_RWLOCK_R, ip, __func__, e_fn, ne);\
} else if (n) { \
dept_ecxt_enter_nokeep(m); \
} else { \
- dept_wait(m, (q) ? DEPT_EVT_RWLOCK_RW : DEPT_EVT_RWLOCK_W, ip, __func__, ne);\
+ dept_wait(m, (q) ? DEPT_EVT_RWLOCK_RW : DEPT_EVT_RWLOCK_W, ip, __func__, ne, s);\
dept_ecxt_enter(m, DEPT_EVT_RWLOCK_R, ip, __func__, e_fn, ne);\
} \
} while (0)
@@ -64,8 +64,8 @@
dept_ecxt_exit(m, DEPT_EVT_RWLOCK_R, ip); \
} while (0)
#else
-#define dept_rwlock_wlock(m, ne, t, n, e_fn, ip) do { } while (0)
-#define dept_rwlock_rlock(m, ne, t, n, e_fn, ip, q) do { } while (0)
+#define dept_rwlock_wlock(m, ne, t, n, e_fn, ip, s) do { } while (0)
+#define dept_rwlock_rlock(m, ne, t, n, e_fn, ip, q, s) do { } while (0)
#define dept_rwlock_wunlock(m, ip) do { } while (0)
#define dept_rwlock_runlock(m, ip) do { } while (0)
#endif
@@ -41,7 +41,7 @@
} else if (n) { \
dept_ecxt_enter_nokeep(m); \
} else { \
- dept_wait(m, 1UL, ip, __func__, ne); \
+ dept_wait(m, 1UL, ip, __func__, ne, true); \
dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne); \
} \
} while (0)
@@ -25,7 +25,7 @@
#ifdef CONFIG_DEPT
#define DEPT_EVT_ALL ((1UL << DEPT_MAX_SUBCLASSES_EVT) - 1)
-#define dept_seq_wait(m, ip) dept_wait(m, DEPT_EVT_ALL, ip, __func__, 0)
+#define dept_seq_wait(m, ip) dept_wait(m, DEPT_EVT_ALL, ip, __func__, 0, false)
#define dept_seq_writebegin(m, ip) \
do { \
dept_ecxt_enter(m, 1UL, ip, __func__, "write_seqcount_end", 0);\
@@ -96,14 +96,14 @@
#endif
#ifdef CONFIG_DEPT
-#define dept_spin_lock(m, ne, t, n, e_fn, ip) \
+#define dept_spin_lock(m, ne, t, n, e_fn, ip, s) \
do { \
if (t) { \
dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne); \
} else if (n) { \
dept_ecxt_enter_nokeep(m); \
} else { \
- dept_wait(m, 1UL, ip, __func__, ne); \
+ dept_wait(m, 1UL, ip, __func__, ne, s); \
dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne); \
} \
} while (0)
@@ -112,8 +112,8 @@
dept_ecxt_exit(m, 1UL, ip); \
} while (0)
#else
-#define dept_spin_lock(m, ne, t, n, e_fn, ip) do { } while (0)
-#define dept_spin_unlock(m, ip) do { } while (0)
+#define dept_spin_lock(m, ne, t, n, e_fn, ip, s) do { } while (0)
+#define dept_spin_unlock(m, ip) do { } while (0)
#endif
#ifdef CONFIG_DEBUG_SPINLOCK
@@ -1425,6 +1425,13 @@ static void add_dep(struct dept_ecxt *e, struct dept_wait *w)
struct dept_dep *d;
int i;
+ /*
+ * It's meaningless to track dependencies between sleeps and
+ * events triggered within __schedule().
+ */
+ if (e->in_sched && w->sleep)
+ return;
+
if (lookup_dep(fc, tc))
return;
@@ -1469,7 +1476,7 @@ static void add_dep(struct dept_ecxt *e, struct dept_wait *w)
static atomic_t wgen = ATOMIC_INIT(1);
static void add_wait(struct dept_class *c, unsigned long ip,
- const char *w_fn, int ne)
+ const char *w_fn, int ne, bool sleep)
{
struct dept_task *dt = dept_task();
struct dept_wait *w;
@@ -1485,6 +1492,7 @@ static void add_wait(struct dept_class *c, unsigned long ip,
w->wait_ip = ip;
w->wait_fn = w_fn;
w->wait_stack = get_current_stack();
+ w->sleep = sleep;
cxt = cur_cxt();
if (cxt == DEPT_CXT_HIRQ || cxt == DEPT_CXT_SIRQ)
@@ -1538,6 +1546,7 @@ static bool add_ecxt(void *obj, struct dept_class *c, unsigned long ip,
e->ecxt_stack = ip && rich_stack ? get_current_stack() : NULL;
e->event_fn = e_fn;
e->ecxt_fn = c_fn;
+ e->in_sched = dt->in_sched;
eh = dt->ecxt_held + (dt->ecxt_held_pos++);
eh->ecxt = get_ecxt(e);
@@ -1906,6 +1915,16 @@ void dept_hardirq_enter(void)
dt->cxt_id[DEPT_CXT_HIRQ] += (1UL << DEPT_CXTS_NR);
}
+void dept_sched_enter(void)
+{
+ dept_task()->in_sched = true;
+}
+
+void dept_sched_exit(void)
+{
+ dept_task()->in_sched = false;
+}
+
/*
* DEPT API
* =====================================================================
@@ -2119,7 +2138,8 @@ static struct dept_class *check_new_class(struct dept_key *local,
}
static void __dept_wait(struct dept_map *m, unsigned long w_f,
- unsigned long ip, const char *w_fn, int ne)
+ unsigned long ip, const char *w_fn, int ne,
+ bool sleep)
{
int e;
@@ -2142,12 +2162,12 @@ static void __dept_wait(struct dept_map *m, unsigned long w_f,
if (!c)
continue;
- add_wait(c, ip, w_fn, ne);
+ add_wait(c, ip, w_fn, ne, sleep);
}
}
void dept_wait(struct dept_map *m, unsigned long w_f, unsigned long ip,
- const char *w_fn, int ne)
+ const char *w_fn, int ne, bool sleep)
{
struct dept_task *dt = dept_task();
unsigned long flags;
@@ -2163,7 +2183,7 @@ void dept_wait(struct dept_map *m, unsigned long w_f, unsigned long ip,
flags = dept_enter();
- __dept_wait(m, w_f, ip, w_fn, ne);
+ __dept_wait(m, w_f, ip, w_fn, ne, sleep);
dept_exit(flags);
}
@@ -2296,7 +2316,7 @@ void dept_ask_event_wait_commit(unsigned long ip)
wg = atomic_inc_return(&wgen) ?: atomic_inc_return(&wgen);
WRITE_ONCE(m->wgen, wg);
- __dept_wait(m, w_f, ip, w_fn, ne);
+ __dept_wait(m, w_f, ip, w_fn, ne, true);
exit:
dept_exit(flags);
}
@@ -2526,7 +2546,8 @@ void dept_split_map_common_init(struct dept_map_common *mc,
void dept_wait_split_map(struct dept_map_each *me,
struct dept_map_common *mc,
- unsigned long ip, const char *w_fn, int ne)
+ unsigned long ip, const char *w_fn, int ne,
+ bool sleep)
{
struct dept_task *dt = dept_task();
struct dept_class *c;
@@ -2547,7 +2568,7 @@ void dept_wait_split_map(struct dept_map_each *me,
k = mc->keys ?: &mc->keys_local;
c = check_new_class(&mc->keys_local, k, 0, 0UL, mc->name);
if (c)
- add_wait(c, ip, w_fn, ne);
+ add_wait(c, ip, w_fn, ne, sleep);
dept_exit(flags);
}
@@ -51,7 +51,7 @@ static __always_inline void __rt_spin_lock(spinlock_t *lock)
void __sched rt_spin_lock(spinlock_t *lock)
{
- spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
+ rt_spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
__rt_spin_lock(lock);
}
EXPORT_SYMBOL(rt_spin_lock);
@@ -59,7 +59,7 @@ void __sched rt_spin_lock(spinlock_t *lock)
#ifdef CONFIG_DEBUG_LOCK_ALLOC
void __sched rt_spin_lock_nested(spinlock_t *lock, int subclass)
{
- spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
+ rt_spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
__rt_spin_lock(lock);
}
EXPORT_SYMBOL(rt_spin_lock_nested);
@@ -67,7 +67,7 @@ void __sched rt_spin_lock_nested(spinlock_t *lock, int subclass)
void __sched rt_spin_lock_nest_lock(spinlock_t *lock,
struct lockdep_map *nest_lock)
{
- spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_);
+ rt_spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_);
__rt_spin_lock(lock);
}
EXPORT_SYMBOL(rt_spin_lock_nest_lock);
@@ -75,7 +75,7 @@ void __sched rt_spin_lock_nest_lock(spinlock_t *lock,
void __sched rt_spin_unlock(spinlock_t *lock)
{
- spin_release(&lock->dep_map, _RET_IP_);
+ rt_spin_release(&lock->dep_map, _RET_IP_);
migrate_enable();
rcu_read_unlock();
@@ -104,7 +104,7 @@ static __always_inline int __rt_spin_trylock(spinlock_t *lock)
ret = rt_mutex_slowtrylock(&lock->lock);
if (ret) {
- spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
+ rt_spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
rcu_read_lock();
migrate_disable();
}
@@ -197,7 +197,7 @@ int __sched rt_read_trylock(rwlock_t *rwlock)
ret = rwbase_read_trylock(&rwlock->rwbase);
if (ret) {
- rwlock_acquire_read(&rwlock->dep_map, 0, 1, _RET_IP_);
+ rt_rwlock_acquire_read(&rwlock->dep_map, 0, 1, _RET_IP_);
rcu_read_lock();
migrate_disable();
}
@@ -211,7 +211,7 @@ int __sched rt_write_trylock(rwlock_t *rwlock)
ret = rwbase_write_trylock(&rwlock->rwbase);
if (ret) {
- rwlock_acquire(&rwlock->dep_map, 0, 1, _RET_IP_);
+ rt_rwlock_acquire(&rwlock->dep_map, 0, 1, _RET_IP_);
rcu_read_lock();
migrate_disable();
}
@@ -222,7 +222,7 @@ int __sched rt_write_trylock(rwlock_t *rwlock)
void __sched rt_read_lock(rwlock_t *rwlock)
{
rtlock_might_resched();
- rwlock_acquire_read(&rwlock->dep_map, 0, 0, _RET_IP_);
+ rt_rwlock_acquire_read(&rwlock->dep_map, 0, 0, _RET_IP_);
rwbase_read_lock(&rwlock->rwbase, TASK_RTLOCK_WAIT);
rcu_read_lock();
migrate_disable();
@@ -232,7 +232,7 @@ void __sched rt_read_lock(rwlock_t *rwlock)
void __sched rt_write_lock(rwlock_t *rwlock)
{
rtlock_might_resched();
- rwlock_acquire(&rwlock->dep_map, 0, 0, _RET_IP_);
+ rt_rwlock_acquire(&rwlock->dep_map, 0, 0, _RET_IP_);
rwbase_write_lock(&rwlock->rwbase, TASK_RTLOCK_WAIT);
rcu_read_lock();
migrate_disable();
@@ -243,7 +243,7 @@ void __sched rt_write_lock(rwlock_t *rwlock)
void __sched rt_write_lock_nested(rwlock_t *rwlock, int subclass)
{
rtlock_might_resched();
- rwlock_acquire(&rwlock->dep_map, subclass, 0, _RET_IP_);
+ rt_rwlock_acquire(&rwlock->dep_map, subclass, 0, _RET_IP_);
rwbase_write_lock(&rwlock->rwbase, TASK_RTLOCK_WAIT);
rcu_read_lock();
migrate_disable();
@@ -253,7 +253,7 @@ void __sched rt_write_lock_nested(rwlock_t *rwlock, int subclass)
void __sched rt_read_unlock(rwlock_t *rwlock)
{
- rwlock_release(&rwlock->dep_map, _RET_IP_);
+ rt_rwlock_release(&rwlock->dep_map, _RET_IP_);
migrate_enable();
rcu_read_unlock();
rwbase_read_unlock(&rwlock->rwbase, TASK_RTLOCK_WAIT);
@@ -262,7 +262,7 @@ void __sched rt_read_unlock(rwlock_t *rwlock)
void __sched rt_write_unlock(rwlock_t *rwlock)
{
- rwlock_release(&rwlock->dep_map, _RET_IP_);
+ rt_rwlock_release(&rwlock->dep_map, _RET_IP_);
rcu_read_unlock();
migrate_enable();
rwbase_write_unlock(&rwlock->rwbase);
@@ -6272,6 +6272,7 @@ static void __sched notrace __schedule(unsigned int sched_mode)
struct rq *rq;
int cpu;
+ dept_sched_enter();
cpu = smp_processor_id();
rq = cpu_rq(cpu);
prev = rq->curr;
@@ -6401,6 +6402,7 @@ static void __sched notrace __schedule(unsigned int sched_mode)
__balance_callbacks(rq);
raw_spin_rq_unlock_irq(rq);
}
+ dept_sched_exit();
}
void __noreturn do_task_dead(void)
A sleep is not a wait that prevents the events within __schedule(). It rather goes through __schedule() so all the events are going to be triggered while sleeping. So they don't have any dependencies with each other. So distinguished sleep type of wait from the other type e.i. spinning and made it skip building dependencies between sleep type of waits and the events within __schedule(). Signed-off-by: Byungchul Park <byungchul.park@lge.com> --- include/linux/completion.h | 2 +- include/linux/dept.h | 28 ++++++++++++++++++++---- include/linux/dept_page.h | 4 ++-- include/linux/dept_sdt.h | 9 +++++++- include/linux/lockdep.h | 52 +++++++++++++++++++++++++++++++++++++++----- include/linux/mutex.h | 2 +- include/linux/rwlock.h | 12 +++++----- include/linux/rwsem.h | 2 +- include/linux/seqlock.h | 2 +- include/linux/spinlock.h | 8 +++---- kernel/dependency/dept.c | 37 ++++++++++++++++++++++++------- kernel/locking/spinlock_rt.c | 24 ++++++++++---------- kernel/sched/core.c | 2 ++ 13 files changed, 138 insertions(+), 46 deletions(-)