Waiman Long ef6eb81213 locking/lockdep: Decrement IRQ context counters when removing lock chain ...

[ Upstream commit b3b9c187dc ]

There are currently three counters to track the IRQ context of a lock
chain - nr_hardirq_chains, nr_softirq_chains and nr_process_chains.
They are incremented when a new lock chain is added, but they are
not decremented when a lock chain is removed. That causes some of the
statistic counts reported by /proc/lockdep_stats to be incorrect.
IRQ
Fix that by decrementing the right counter when a lock chain is removed.

Since inc_chains() no longer accesses hardirq_context and softirq_context
directly, it is moved out from the CONFIG_TRACE_IRQFLAGS conditional
compilation block.

Fixes: a0b0fd53e1 ("locking/lockdep: Free lock classes that are no longer in use")
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20200206152408.24165-2-longman@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

2020-10-01 13:17:33 +02:00

..

lock_events_list.h

locking/rwsem: Adaptive disabling of reader optimistic spinning

2019-06-17 12:28:09 +02:00

lock_events.c

locking/lock_events: Don't show pvqspinlock events on bare metal

2019-04-10 10:56:05 +02:00

lock_events.h

locking/lock_events: Use raw_cpu_{add,inc}() for stats

2019-06-03 12:32:56 +02:00

lockdep_internals.h

locking/lockdep: Decrement IRQ context counters when removing lock chain

2020-10-01 13:17:33 +02:00

lockdep_proc.c

locking/lockdep: Fix overflow in presentation of average lock-time

2020-09-03 11:26:47 +02:00

lockdep_states.h

locking/lockdep: Rework FS_RECLAIM annotation

2017-08-10 12:29:03 +02:00

lockdep.c

locking/lockdep: Decrement IRQ context counters when removing lock chain

2020-10-01 13:17:33 +02:00

locktorture.c

locktorture: Print ratio of acquisitions, not failures

2020-04-23 10:36:44 +02:00

Makefile

locking/rwsem: Merge rwsem.h and rwsem-xadd.c into rwsem.c

2019-06-17 12:27:57 +02:00

mcs_spinlock.h

locking/mcs: Use smp_cond_load_acquire() in MCS spin loop

2018-04-27 09:48:49 +02:00

mutex-debug.c

locking/mutex: Replace spin_is_locked() with lockdep

2018-11-12 09:06:22 -08:00

mutex-debug.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

mutex.c

mutex: Fix up mutex_waiter usage

2019-08-08 09:09:25 +02:00

mutex.h

mutex: Fix up mutex_waiter usage

2019-08-08 09:09:25 +02:00

osq_lock.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

percpu-rwsem.c

Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu

2019-06-28 19:46:47 +02:00

qrwlock.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157

2019-05-30 11:26:37 -07:00

qspinlock_paravirt.h

Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"

2019-09-25 10:22:37 +02:00

qspinlock_stat.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157

2019-05-30 11:26:37 -07:00

qspinlock.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157

2019-05-30 11:26:37 -07:00

rtmutex_common.h

locking/rtmutex: Handle non enqueued waiters gracefully in remove_waiter()

2018-03-28 23:01:30 +02:00

rtmutex-debug.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

rtmutex-debug.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

rtmutex.c

sched/core: Convert get_task_struct() to return the task

2019-07-25 15:51:54 +02:00

rtmutex.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

rwsem.c

locking/rwsem: Fix kernel crash when spinning on RWSEM_OWNER_UNKNOWN

2020-01-23 08:22:37 +01:00

rwsem.h

locking/rwsem: Merge rwsem.h and rwsem-xadd.c into rwsem.c

2019-06-17 12:27:57 +02:00

semaphore.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 436

2019-06-05 17:37:17 +02:00

spinlock_debug.c

locking/spinlock/debug: Fix various data races

2020-01-12 12:21:13 +01:00

spinlock.c

asm-generic/mmiowb: Add generic implementation of mmiowb() tracking

2019-04-08 11:59:39 +01:00

test-ww_mutex.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 9

2019-05-21 11:28:40 +02:00