From: Peter Zijlstra <peterz@infradead.org>
To: mingo@kernel.org
Cc: linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
fweisbec@gmail.com, oleg@redhat.com, umgwanakikbuti@gmail.com,
tglx@linutronix.de, rostedt@goodmis.org,
Peter Zijlstra <peterz@infradead.org>
Subject: [PATCH v2 12/12] sched: Add preempt_count invariant check
Date: Wed, 30 Sep 2015 09:10:47 +0200 [thread overview]
Message-ID: <20150930072304.760800554@infradead.org> (raw)
In-Reply-To: 20150930071035.514587432@infradead.org
[-- Attachment #1: peterz-kill-preempt_active-12.patch --]
[-- Type: text/plain, Size: 661 bytes --]
Ingo requested I keep my debug check for the preempt_count invariant.
Requested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
kernel/sched/core.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2514,6 +2514,10 @@ static struct rq *finish_task_switch(str
*
* Also, see FORK_PREEMPT_COUNT.
*/
+ if (unlikely(WARN_ONCE(preempt_count() != 2*PREEMPT_DISABLE_OFFSET,
+ "corrupted preempt_count: %s/%d/0x%x\n",
+ current->comm, current->pid, preempt_count())))
+ preempt_count_set(FORK_PREEMPT_COUNT);
rq->prev_mm = NULL;
next prev parent reply other threads:[~2015-09-30 7:34 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-30 7:10 [PATCH v2 00/12] sched: Killing PREEMPT_ACTIVE Peter Zijlstra
2015-09-30 7:10 ` [PATCH v2 01/12] sched: Simplify INIT_PREEMPT_COUNT Peter Zijlstra
2015-09-30 9:04 ` Steven Rostedt
2015-09-30 20:39 ` Thomas Gleixner
2015-10-01 13:25 ` Frederic Weisbecker
2015-09-30 7:10 ` [PATCH v2 02/12] sched: Rework TASK_DEAD preemption exception Peter Zijlstra
2015-09-30 7:10 ` [PATCH v2 03/12] sched: Create preempt_count invariant Peter Zijlstra
2015-09-30 9:32 ` Steven Rostedt
2015-09-30 11:13 ` Peter Zijlstra
2015-09-30 13:36 ` Steven Rostedt
2015-09-30 7:10 ` [PATCH v2 04/12] sched: Add preempt argument to __schedule() Peter Zijlstra
2015-09-30 7:10 ` [PATCH v2 05/12] sched: Fix trace_sched_switch() Peter Zijlstra
2015-09-30 7:10 ` [PATCH v2 06/12] sched: Stop setting PREEMPT_ACTIVE Peter Zijlstra
2015-10-01 15:27 ` Frederic Weisbecker
2015-09-30 7:10 ` [PATCH v2 07/12] sched: Robustify preemption leak checks Peter Zijlstra
2015-09-30 9:35 ` Steven Rostedt
2015-09-30 7:10 ` [PATCH v2 08/12] sched: Simplify preempt_count tests Peter Zijlstra
2015-10-01 15:31 ` Frederic Weisbecker
2015-09-30 7:10 ` [PATCH v2 09/12] sched, x86: Kill saved_preempt_count Peter Zijlstra
2015-10-01 15:40 ` Frederic Weisbecker
2015-09-30 7:10 ` [PATCH v2 10/12] sched: Kill PREEMPT_ACTIVE Peter Zijlstra
2015-10-01 15:41 ` Frederic Weisbecker
2015-09-30 7:10 ` [PATCH v2 11/12] sched: More notrace Peter Zijlstra
2015-09-30 7:10 ` Peter Zijlstra [this message]
2015-09-30 9:38 ` [PATCH v2 12/12] sched: Add preempt_count invariant check Steven Rostedt
2015-09-30 11:15 ` Peter Zijlstra
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