Re: [PATCH] sched/deadline: Add missing update_rq_clock() in dl_task_timer()
Hi, On 06/03/17 21:51, Wanpeng Li wrote: > From: Wanpeng Li> > The following warning can be triggered by hot-unplugging the CPU > on which an active SCHED_DEADLINE task is running on: > > [ cut here ] > WARNING: CPU: 7 PID: 0 at kernel/sched/sched.h:833 > replenish_dl_entity+0x71e/0xc40 > rq->clock_update_flags < RQCF_ACT_SKIP > CPU: 7 PID: 0 Comm: swapper/7 Tainted: GB 4.11.0-rc1+ #24 > Hardware name: LENOVO ThinkCentre M8500t-N000/SHARKBAY, BIOS FBKTC1AUS > 02/16/2016 > Call Trace: > > dump_stack+0x85/0xc4 > __warn+0x172/0x1b0 > warn_slowpath_fmt+0xb4/0xf0 > ? __warn+0x1b0/0x1b0 > ? debug_check_no_locks_freed+0x2c0/0x2c0 > ? cpudl_set+0x3d/0x2b0 > replenish_dl_entity+0x71e/0xc40 > enqueue_task_dl+0x2ea/0x12e0 > ? dl_task_timer+0x777/0x990 > ? __hrtimer_run_queues+0x270/0xa50 > dl_task_timer+0x316/0x990 > ? enqueue_task_dl+0x12e0/0x12e0 > ? enqueue_task_dl+0x12e0/0x12e0 > __hrtimer_run_queues+0x270/0xa50 > ? hrtimer_cancel+0x20/0x20 > ? hrtimer_interrupt+0x119/0x600 > hrtimer_interrupt+0x19c/0x600 > ? trace_hardirqs_off+0xd/0x10 > local_apic_timer_interrupt+0x74/0xe0 > smp_apic_timer_interrupt+0x76/0xa0 > apic_timer_interrupt+0x93/0xa0 > > The DL task will be migrated to a suitable later deadline rq once the DL > timer fires and currnet rq is offline. The rq clock of the new rq should > be updated. This patch fixes it by updating the rq clock after holding > the new rq's rq lock. > > Cc: Juri Lelli > Cc: Peter Zijlstra > Cc: Ingo Molnar > Cc: Thomas Gleixner > Cc: Matt Fleming > Signed-off-by: Wanpeng Li > --- > kernel/sched/deadline.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c > index 99b2c33..c6db3fd 100644 > --- a/kernel/sched/deadline.c > +++ b/kernel/sched/deadline.c > @@ -638,6 +638,7 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer > *timer) > lockdep_unpin_lock(>lock, rf.cookie); > rq = dl_task_offline_migration(rq, p); > rf.cookie = lockdep_pin_lock(>lock); > + update_rq_clock(rq); Looks good to me. Acked-by: Juri Lelli Thanks, - Juri
Re: [PATCH] sched/deadline: Add missing update_rq_clock() in dl_task_timer()
Hi, On 06/03/17 21:51, Wanpeng Li wrote: > From: Wanpeng Li > > The following warning can be triggered by hot-unplugging the CPU > on which an active SCHED_DEADLINE task is running on: > > [ cut here ] > WARNING: CPU: 7 PID: 0 at kernel/sched/sched.h:833 > replenish_dl_entity+0x71e/0xc40 > rq->clock_update_flags < RQCF_ACT_SKIP > CPU: 7 PID: 0 Comm: swapper/7 Tainted: GB 4.11.0-rc1+ #24 > Hardware name: LENOVO ThinkCentre M8500t-N000/SHARKBAY, BIOS FBKTC1AUS > 02/16/2016 > Call Trace: > > dump_stack+0x85/0xc4 > __warn+0x172/0x1b0 > warn_slowpath_fmt+0xb4/0xf0 > ? __warn+0x1b0/0x1b0 > ? debug_check_no_locks_freed+0x2c0/0x2c0 > ? cpudl_set+0x3d/0x2b0 > replenish_dl_entity+0x71e/0xc40 > enqueue_task_dl+0x2ea/0x12e0 > ? dl_task_timer+0x777/0x990 > ? __hrtimer_run_queues+0x270/0xa50 > dl_task_timer+0x316/0x990 > ? enqueue_task_dl+0x12e0/0x12e0 > ? enqueue_task_dl+0x12e0/0x12e0 > __hrtimer_run_queues+0x270/0xa50 > ? hrtimer_cancel+0x20/0x20 > ? hrtimer_interrupt+0x119/0x600 > hrtimer_interrupt+0x19c/0x600 > ? trace_hardirqs_off+0xd/0x10 > local_apic_timer_interrupt+0x74/0xe0 > smp_apic_timer_interrupt+0x76/0xa0 > apic_timer_interrupt+0x93/0xa0 > > The DL task will be migrated to a suitable later deadline rq once the DL > timer fires and currnet rq is offline. The rq clock of the new rq should > be updated. This patch fixes it by updating the rq clock after holding > the new rq's rq lock. > > Cc: Juri Lelli > Cc: Peter Zijlstra > Cc: Ingo Molnar > Cc: Thomas Gleixner > Cc: Matt Fleming > Signed-off-by: Wanpeng Li > --- > kernel/sched/deadline.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c > index 99b2c33..c6db3fd 100644 > --- a/kernel/sched/deadline.c > +++ b/kernel/sched/deadline.c > @@ -638,6 +638,7 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer > *timer) > lockdep_unpin_lock(>lock, rf.cookie); > rq = dl_task_offline_migration(rq, p); > rf.cookie = lockdep_pin_lock(>lock); > + update_rq_clock(rq); Looks good to me. Acked-by: Juri Lelli Thanks, - Juri
Re: [PATCH] sched/deadline: Add missing update_rq_clock() in dl_task_timer()
On 03/15/2017 08:53 AM, Wanpeng Li wrote: > Ping, :) > 2017-03-07 13:51 GMT+08:00 Wanpeng Li: >> From: Wanpeng Li >> >> The following warning can be triggered by hot-unplugging the CPU >> on which an active SCHED_DEADLINE task is running on: >> >> [ cut here ] >> WARNING: CPU: 7 PID: 0 at kernel/sched/sched.h:833 >> replenish_dl_entity+0x71e/0xc40 >> rq->clock_update_flags < RQCF_ACT_SKIP >> CPU: 7 PID: 0 Comm: swapper/7 Tainted: GB 4.11.0-rc1+ #24 >> Hardware name: LENOVO ThinkCentre M8500t-N000/SHARKBAY, BIOS FBKTC1AUS >> 02/16/2016 >> Call Trace: >> >> dump_stack+0x85/0xc4 >> __warn+0x172/0x1b0 >> warn_slowpath_fmt+0xb4/0xf0 >> ? __warn+0x1b0/0x1b0 >> ? debug_check_no_locks_freed+0x2c0/0x2c0 >> ? cpudl_set+0x3d/0x2b0 >> replenish_dl_entity+0x71e/0xc40 >> enqueue_task_dl+0x2ea/0x12e0 >> ? dl_task_timer+0x777/0x990 >> ? __hrtimer_run_queues+0x270/0xa50 >> dl_task_timer+0x316/0x990 >> ? enqueue_task_dl+0x12e0/0x12e0 >> ? enqueue_task_dl+0x12e0/0x12e0 >> __hrtimer_run_queues+0x270/0xa50 >> ? hrtimer_cancel+0x20/0x20 >> ? hrtimer_interrupt+0x119/0x600 >> hrtimer_interrupt+0x19c/0x600 >> ? trace_hardirqs_off+0xd/0x10 >> local_apic_timer_interrupt+0x74/0xe0 >> smp_apic_timer_interrupt+0x76/0xa0 >> apic_timer_interrupt+0x93/0xa0 >> >> The DL task will be migrated to a suitable later deadline rq once the DL >> timer fires and currnet rq is offline. The rq clock of the new rq should >> be updated. This patch fixes it by updating the rq clock after holding >> the new rq's rq lock. >> >> Cc: Juri Lelli >> Cc: Peter Zijlstra >> Cc: Ingo Molnar >> Cc: Thomas Gleixner >> Cc: Matt Fleming >> Signed-off-by: Wanpeng Li Reviewed-by: Daniel Bristot de Oliveira -- Daniel
Re: [PATCH] sched/deadline: Add missing update_rq_clock() in dl_task_timer()
On 03/15/2017 08:53 AM, Wanpeng Li wrote: > Ping, :) > 2017-03-07 13:51 GMT+08:00 Wanpeng Li : >> From: Wanpeng Li >> >> The following warning can be triggered by hot-unplugging the CPU >> on which an active SCHED_DEADLINE task is running on: >> >> [ cut here ] >> WARNING: CPU: 7 PID: 0 at kernel/sched/sched.h:833 >> replenish_dl_entity+0x71e/0xc40 >> rq->clock_update_flags < RQCF_ACT_SKIP >> CPU: 7 PID: 0 Comm: swapper/7 Tainted: GB 4.11.0-rc1+ #24 >> Hardware name: LENOVO ThinkCentre M8500t-N000/SHARKBAY, BIOS FBKTC1AUS >> 02/16/2016 >> Call Trace: >> >> dump_stack+0x85/0xc4 >> __warn+0x172/0x1b0 >> warn_slowpath_fmt+0xb4/0xf0 >> ? __warn+0x1b0/0x1b0 >> ? debug_check_no_locks_freed+0x2c0/0x2c0 >> ? cpudl_set+0x3d/0x2b0 >> replenish_dl_entity+0x71e/0xc40 >> enqueue_task_dl+0x2ea/0x12e0 >> ? dl_task_timer+0x777/0x990 >> ? __hrtimer_run_queues+0x270/0xa50 >> dl_task_timer+0x316/0x990 >> ? enqueue_task_dl+0x12e0/0x12e0 >> ? enqueue_task_dl+0x12e0/0x12e0 >> __hrtimer_run_queues+0x270/0xa50 >> ? hrtimer_cancel+0x20/0x20 >> ? hrtimer_interrupt+0x119/0x600 >> hrtimer_interrupt+0x19c/0x600 >> ? trace_hardirqs_off+0xd/0x10 >> local_apic_timer_interrupt+0x74/0xe0 >> smp_apic_timer_interrupt+0x76/0xa0 >> apic_timer_interrupt+0x93/0xa0 >> >> The DL task will be migrated to a suitable later deadline rq once the DL >> timer fires and currnet rq is offline. The rq clock of the new rq should >> be updated. This patch fixes it by updating the rq clock after holding >> the new rq's rq lock. >> >> Cc: Juri Lelli >> Cc: Peter Zijlstra >> Cc: Ingo Molnar >> Cc: Thomas Gleixner >> Cc: Matt Fleming >> Signed-off-by: Wanpeng Li Reviewed-by: Daniel Bristot de Oliveira -- Daniel
Re: [PATCH] sched/deadline: Add missing update_rq_clock() in dl_task_timer()
Ping, :) 2017-03-07 13:51 GMT+08:00 Wanpeng Li: > From: Wanpeng Li > > The following warning can be triggered by hot-unplugging the CPU > on which an active SCHED_DEADLINE task is running on: > > [ cut here ] > WARNING: CPU: 7 PID: 0 at kernel/sched/sched.h:833 > replenish_dl_entity+0x71e/0xc40 > rq->clock_update_flags < RQCF_ACT_SKIP > CPU: 7 PID: 0 Comm: swapper/7 Tainted: GB 4.11.0-rc1+ #24 > Hardware name: LENOVO ThinkCentre M8500t-N000/SHARKBAY, BIOS FBKTC1AUS > 02/16/2016 > Call Trace: > > dump_stack+0x85/0xc4 > __warn+0x172/0x1b0 > warn_slowpath_fmt+0xb4/0xf0 > ? __warn+0x1b0/0x1b0 > ? debug_check_no_locks_freed+0x2c0/0x2c0 > ? cpudl_set+0x3d/0x2b0 > replenish_dl_entity+0x71e/0xc40 > enqueue_task_dl+0x2ea/0x12e0 > ? dl_task_timer+0x777/0x990 > ? __hrtimer_run_queues+0x270/0xa50 > dl_task_timer+0x316/0x990 > ? enqueue_task_dl+0x12e0/0x12e0 > ? enqueue_task_dl+0x12e0/0x12e0 > __hrtimer_run_queues+0x270/0xa50 > ? hrtimer_cancel+0x20/0x20 > ? hrtimer_interrupt+0x119/0x600 > hrtimer_interrupt+0x19c/0x600 > ? trace_hardirqs_off+0xd/0x10 > local_apic_timer_interrupt+0x74/0xe0 > smp_apic_timer_interrupt+0x76/0xa0 > apic_timer_interrupt+0x93/0xa0 > > The DL task will be migrated to a suitable later deadline rq once the DL > timer fires and currnet rq is offline. The rq clock of the new rq should > be updated. This patch fixes it by updating the rq clock after holding > the new rq's rq lock. > > Cc: Juri Lelli > Cc: Peter Zijlstra > Cc: Ingo Molnar > Cc: Thomas Gleixner > Cc: Matt Fleming > Signed-off-by: Wanpeng Li > --- > kernel/sched/deadline.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c > index 99b2c33..c6db3fd 100644 > --- a/kernel/sched/deadline.c > +++ b/kernel/sched/deadline.c > @@ -638,6 +638,7 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer > *timer) > lockdep_unpin_lock(>lock, rf.cookie); > rq = dl_task_offline_migration(rq, p); > rf.cookie = lockdep_pin_lock(>lock); > + update_rq_clock(rq); > > /* > * Now that the task has been migrated to the new RQ and we > -- > 2.7.4 >
Re: [PATCH] sched/deadline: Add missing update_rq_clock() in dl_task_timer()
Ping, :) 2017-03-07 13:51 GMT+08:00 Wanpeng Li : > From: Wanpeng Li > > The following warning can be triggered by hot-unplugging the CPU > on which an active SCHED_DEADLINE task is running on: > > [ cut here ] > WARNING: CPU: 7 PID: 0 at kernel/sched/sched.h:833 > replenish_dl_entity+0x71e/0xc40 > rq->clock_update_flags < RQCF_ACT_SKIP > CPU: 7 PID: 0 Comm: swapper/7 Tainted: GB 4.11.0-rc1+ #24 > Hardware name: LENOVO ThinkCentre M8500t-N000/SHARKBAY, BIOS FBKTC1AUS > 02/16/2016 > Call Trace: > > dump_stack+0x85/0xc4 > __warn+0x172/0x1b0 > warn_slowpath_fmt+0xb4/0xf0 > ? __warn+0x1b0/0x1b0 > ? debug_check_no_locks_freed+0x2c0/0x2c0 > ? cpudl_set+0x3d/0x2b0 > replenish_dl_entity+0x71e/0xc40 > enqueue_task_dl+0x2ea/0x12e0 > ? dl_task_timer+0x777/0x990 > ? __hrtimer_run_queues+0x270/0xa50 > dl_task_timer+0x316/0x990 > ? enqueue_task_dl+0x12e0/0x12e0 > ? enqueue_task_dl+0x12e0/0x12e0 > __hrtimer_run_queues+0x270/0xa50 > ? hrtimer_cancel+0x20/0x20 > ? hrtimer_interrupt+0x119/0x600 > hrtimer_interrupt+0x19c/0x600 > ? trace_hardirqs_off+0xd/0x10 > local_apic_timer_interrupt+0x74/0xe0 > smp_apic_timer_interrupt+0x76/0xa0 > apic_timer_interrupt+0x93/0xa0 > > The DL task will be migrated to a suitable later deadline rq once the DL > timer fires and currnet rq is offline. The rq clock of the new rq should > be updated. This patch fixes it by updating the rq clock after holding > the new rq's rq lock. > > Cc: Juri Lelli > Cc: Peter Zijlstra > Cc: Ingo Molnar > Cc: Thomas Gleixner > Cc: Matt Fleming > Signed-off-by: Wanpeng Li > --- > kernel/sched/deadline.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c > index 99b2c33..c6db3fd 100644 > --- a/kernel/sched/deadline.c > +++ b/kernel/sched/deadline.c > @@ -638,6 +638,7 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer > *timer) > lockdep_unpin_lock(>lock, rf.cookie); > rq = dl_task_offline_migration(rq, p); > rf.cookie = lockdep_pin_lock(>lock); > + update_rq_clock(rq); > > /* > * Now that the task has been migrated to the new RQ and we > -- > 2.7.4 >
Re: [PATCH] sched/deadline: Add missing update_rq_clock() in dl_task_timer()
On Mon, 06 Mar, at 09:51:28PM, Wanpeng Li wrote: > From: Wanpeng Li> > The following warning can be triggered by hot-unplugging the CPU > on which an active SCHED_DEADLINE task is running on: > > [ cut here ] > WARNING: CPU: 7 PID: 0 at kernel/sched/sched.h:833 > replenish_dl_entity+0x71e/0xc40 > rq->clock_update_flags < RQCF_ACT_SKIP > CPU: 7 PID: 0 Comm: swapper/7 Tainted: GB 4.11.0-rc1+ #24 [...] > diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c > index 99b2c33..c6db3fd 100644 > --- a/kernel/sched/deadline.c > +++ b/kernel/sched/deadline.c > @@ -638,6 +638,7 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer > *timer) > lockdep_unpin_lock(>lock, rf.cookie); > rq = dl_task_offline_migration(rq, p); > rf.cookie = lockdep_pin_lock(>lock); > + update_rq_clock(rq); > > /* >* Now that the task has been migrated to the new RQ and we Yeah, I guess the reason we can't use the rq_repin_lock() function is because of all the DL double rq locking going on inside of dl_task_offline_migration(). I'd definitely like someone else to verify, but this looks OK to me. Reviewed-by: Matt Fleming
Re: [PATCH] sched/deadline: Add missing update_rq_clock() in dl_task_timer()
On Mon, 06 Mar, at 09:51:28PM, Wanpeng Li wrote: > From: Wanpeng Li > > The following warning can be triggered by hot-unplugging the CPU > on which an active SCHED_DEADLINE task is running on: > > [ cut here ] > WARNING: CPU: 7 PID: 0 at kernel/sched/sched.h:833 > replenish_dl_entity+0x71e/0xc40 > rq->clock_update_flags < RQCF_ACT_SKIP > CPU: 7 PID: 0 Comm: swapper/7 Tainted: GB 4.11.0-rc1+ #24 [...] > diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c > index 99b2c33..c6db3fd 100644 > --- a/kernel/sched/deadline.c > +++ b/kernel/sched/deadline.c > @@ -638,6 +638,7 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer > *timer) > lockdep_unpin_lock(>lock, rf.cookie); > rq = dl_task_offline_migration(rq, p); > rf.cookie = lockdep_pin_lock(>lock); > + update_rq_clock(rq); > > /* >* Now that the task has been migrated to the new RQ and we Yeah, I guess the reason we can't use the rq_repin_lock() function is because of all the DL double rq locking going on inside of dl_task_offline_migration(). I'd definitely like someone else to verify, but this looks OK to me. Reviewed-by: Matt Fleming
[PATCH] sched/deadline: Add missing update_rq_clock() in dl_task_timer()
From: Wanpeng LiThe following warning can be triggered by hot-unplugging the CPU on which an active SCHED_DEADLINE task is running on: [ cut here ] WARNING: CPU: 7 PID: 0 at kernel/sched/sched.h:833 replenish_dl_entity+0x71e/0xc40 rq->clock_update_flags < RQCF_ACT_SKIP CPU: 7 PID: 0 Comm: swapper/7 Tainted: GB 4.11.0-rc1+ #24 Hardware name: LENOVO ThinkCentre M8500t-N000/SHARKBAY, BIOS FBKTC1AUS 02/16/2016 Call Trace: dump_stack+0x85/0xc4 __warn+0x172/0x1b0 warn_slowpath_fmt+0xb4/0xf0 ? __warn+0x1b0/0x1b0 ? debug_check_no_locks_freed+0x2c0/0x2c0 ? cpudl_set+0x3d/0x2b0 replenish_dl_entity+0x71e/0xc40 enqueue_task_dl+0x2ea/0x12e0 ? dl_task_timer+0x777/0x990 ? __hrtimer_run_queues+0x270/0xa50 dl_task_timer+0x316/0x990 ? enqueue_task_dl+0x12e0/0x12e0 ? enqueue_task_dl+0x12e0/0x12e0 __hrtimer_run_queues+0x270/0xa50 ? hrtimer_cancel+0x20/0x20 ? hrtimer_interrupt+0x119/0x600 hrtimer_interrupt+0x19c/0x600 ? trace_hardirqs_off+0xd/0x10 local_apic_timer_interrupt+0x74/0xe0 smp_apic_timer_interrupt+0x76/0xa0 apic_timer_interrupt+0x93/0xa0 The DL task will be migrated to a suitable later deadline rq once the DL timer fires and currnet rq is offline. The rq clock of the new rq should be updated. This patch fixes it by updating the rq clock after holding the new rq's rq lock. Cc: Juri Lelli Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Matt Fleming Signed-off-by: Wanpeng Li --- kernel/sched/deadline.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 99b2c33..c6db3fd 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -638,6 +638,7 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer *timer) lockdep_unpin_lock(>lock, rf.cookie); rq = dl_task_offline_migration(rq, p); rf.cookie = lockdep_pin_lock(>lock); + update_rq_clock(rq); /* * Now that the task has been migrated to the new RQ and we -- 2.7.4
[PATCH] sched/deadline: Add missing update_rq_clock() in dl_task_timer()
From: Wanpeng Li The following warning can be triggered by hot-unplugging the CPU on which an active SCHED_DEADLINE task is running on: [ cut here ] WARNING: CPU: 7 PID: 0 at kernel/sched/sched.h:833 replenish_dl_entity+0x71e/0xc40 rq->clock_update_flags < RQCF_ACT_SKIP CPU: 7 PID: 0 Comm: swapper/7 Tainted: GB 4.11.0-rc1+ #24 Hardware name: LENOVO ThinkCentre M8500t-N000/SHARKBAY, BIOS FBKTC1AUS 02/16/2016 Call Trace: dump_stack+0x85/0xc4 __warn+0x172/0x1b0 warn_slowpath_fmt+0xb4/0xf0 ? __warn+0x1b0/0x1b0 ? debug_check_no_locks_freed+0x2c0/0x2c0 ? cpudl_set+0x3d/0x2b0 replenish_dl_entity+0x71e/0xc40 enqueue_task_dl+0x2ea/0x12e0 ? dl_task_timer+0x777/0x990 ? __hrtimer_run_queues+0x270/0xa50 dl_task_timer+0x316/0x990 ? enqueue_task_dl+0x12e0/0x12e0 ? enqueue_task_dl+0x12e0/0x12e0 __hrtimer_run_queues+0x270/0xa50 ? hrtimer_cancel+0x20/0x20 ? hrtimer_interrupt+0x119/0x600 hrtimer_interrupt+0x19c/0x600 ? trace_hardirqs_off+0xd/0x10 local_apic_timer_interrupt+0x74/0xe0 smp_apic_timer_interrupt+0x76/0xa0 apic_timer_interrupt+0x93/0xa0 The DL task will be migrated to a suitable later deadline rq once the DL timer fires and currnet rq is offline. The rq clock of the new rq should be updated. This patch fixes it by updating the rq clock after holding the new rq's rq lock. Cc: Juri Lelli Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Matt Fleming Signed-off-by: Wanpeng Li --- kernel/sched/deadline.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 99b2c33..c6db3fd 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -638,6 +638,7 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer *timer) lockdep_unpin_lock(>lock, rf.cookie); rq = dl_task_offline_migration(rq, p); rf.cookie = lockdep_pin_lock(>lock); + update_rq_clock(rq); /* * Now that the task has been migrated to the new RQ and we -- 2.7.4