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From: Peter Zijlstra <peterz@infradead.org>
To: Linus Torvalds <torvalds@linux-foundation.org>,
	Ingo Molnar <mingo@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>, Peter Anvin <hpa@zytor.com>,
	Mike Galbraith <bitbucket@online.de>,
	Thomas Gleixner <tglx@linutronix.de>,
	Arjan van de Ven <arjan@linux.intel.com>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: [PATCH 6/7] sched, x86: Provide a per-cpu preempt_count implementation
Date: Tue, 10 Sep 2013 15:27:24 +0200	[thread overview]
Message-ID: <20130910132724.GF31370@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20130910132011.396291123@infradead.org>

On Tue, Sep 10, 2013 at 03:08:17PM +0200, Peter Zijlstra wrote:
> @@ -1095,6 +1095,9 @@ DEFINE_PER_CPU(char *, irq_stack_ptr) =
>  
>  DEFINE_PER_CPU(unsigned int, irq_count) __visible = -1;
>  
> +DEFINE_PER_CPU(int, __preempt_count) = INIT_PREEMPT_COUNT;
> +EXPORT_PER_CPU_SYMBOL(__preempt_count);
> +

Note that afaict this patch takes away the reason irq_count exists.

  reply	other threads:[~2013-09-10 13:27 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-10 13:08 [PATCH 0/7] preempt_count rework -v2 Peter Zijlstra
2013-09-10 13:08 ` [PATCH 1/7] sched: Introduce preempt_count accessor functions Peter Zijlstra
2013-09-10 13:08 ` [PATCH 2/7] sched: Add NEED_RESCHED to the preempt_count Peter Zijlstra
2013-09-11  1:59   ` Andy Lutomirski
2013-09-11  8:25     ` Peter Zijlstra
2013-09-11 11:06       ` Peter Zijlstra
2013-09-11 13:34         ` Mike Galbraith
2013-09-12  6:01           ` Mike Galbraith
2013-09-11 16:35         ` Andy Lutomirski
2013-09-11 18:05           ` Peter Zijlstra
2013-09-11 18:07             ` Andy Lutomirski
2013-09-11 11:14   ` Peter Zijlstra
2013-09-10 13:08 ` [PATCH 3/7] sched, arch: Create asm/preempt.h Peter Zijlstra
2013-09-10 13:08 ` [PATCH 4/7] sched: Create more preempt_count accessors Peter Zijlstra
2013-09-10 13:08 ` [PATCH 5/7] sched: Extract the basic add/sub preempt_count modifiers Peter Zijlstra
2013-09-10 13:08 ` [PATCH 6/7] sched, x86: Provide a per-cpu preempt_count implementation Peter Zijlstra
2013-09-10 13:27   ` Peter Zijlstra [this message]
2013-09-10 14:02   ` Eric Dumazet
2013-09-10 15:25     ` Peter Zijlstra
2013-09-10 16:48   ` Peter Zijlstra
2013-09-10 13:08 ` [PATCH 7/7] sched, x86: Optimize the preempt_schedule() call Peter Zijlstra
2013-09-10 13:42   ` Ingo Molnar
2013-09-10 13:55     ` Jan Beulich
2013-09-10 13:55       ` Jan Beulich
2013-09-10 14:25       ` Ingo Molnar
2013-09-10 13:51 ` [PATCH 0/7] preempt_count rework -v2 Ingo Molnar
2013-09-10 13:56   ` Ingo Molnar
2013-09-10 15:14     ` Peter Zijlstra
2013-09-10 15:29     ` Arjan van de Ven
2013-09-10 15:35       ` Peter Zijlstra
2013-09-10 16:24       ` Linus Torvalds
2013-09-11 16:00         ` H. Peter Anvin
2013-09-10 16:34     ` Linus Torvalds
2013-09-10 16:45       ` Peter Zijlstra
2013-09-10 17:06         ` Linus Torvalds
2013-09-10 21:25           ` Peter Zijlstra
2013-09-10 21:43             ` Linus Torvalds
2013-09-10 21:51               ` H. Peter Anvin
2013-09-10 22:02                 ` Linus Torvalds
2013-09-10 22:06                   ` H. Peter Anvin
2013-09-11 13:13               ` Peter Zijlstra
2013-09-11 13:26                 ` Peter Zijlstra
2013-09-11 15:29                 ` H. Peter Anvin
2013-09-11 15:33                 ` Linus Torvalds
2013-09-11 18:59                   ` Peter Zijlstra
2013-09-11 23:02                     ` Linus Torvalds
2013-09-12  2:20                       ` Peter Zijlstra
2013-09-12  2:43                         ` Linus Torvalds
2013-09-12 11:51                           ` Peter Zijlstra
2013-09-12 12:25                             ` Ingo Molnar
2013-09-13  7:25                         ` Kevin Easton
2013-09-13  8:06                           ` Peter Zijlstra

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