From: Peter Zijlstra <peterz@infradead.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: mingo@kernel.org, linux-kernel@vger.kernel.org,
torvalds@linux-foundation.org, fweisbec@gmail.com,
oleg@redhat.com, umgwanakikbuti@gmail.com, tglx@linutronix.de
Subject: Re: [PATCH v2 03/12] sched: Create preempt_count invariant
Date: Wed, 30 Sep 2015 13:13:23 +0200 [thread overview]
Message-ID: <20150930111323.GB2903@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20150930053208.0604317b@gandalf.local.home>
On Wed, Sep 30, 2015 at 05:32:08AM -0400, Steven Rostedt wrote:
> On Wed, 30 Sep 2015 09:10:38 +0200
> Peter Zijlstra <peterz@infradead.org> wrote:
> > -#ifdef CONFIG_PREEMPT_COUNT
> > -#define PREEMPT_DISABLED (1 + PREEMPT_ENABLED)
> > -#else
> > -#define PREEMPT_DISABLED PREEMPT_ENABLED
> > -#endif
> > +#define PREEMPT_DISABLED (PREEMPT_DISABLE_OFFSET + PREEMPT_ENABLED)
>
> Hmm, it looks to me that you removed all users of PREEMPT_DISABLED.
>
> Did you add another user of it?
Dunno, lemme go grep ;-)
include/linux/sched.h:#define PREEMPT_DISABLED (PREEMPT_DISABLE_OFFSET + PREEMPT_ENABLED)
kernel/sched/core.c: preempt_count_set(PREEMPT_DISABLED);
So there still is one user.
next prev parent reply other threads:[~2015-09-30 11:13 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 [this message]
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 ` [PATCH v2 12/12] sched: Add preempt_count invariant check Peter Zijlstra
2015-09-30 9:38 ` Steven Rostedt
2015-09-30 11:15 ` Peter Zijlstra
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