From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Paul Mackerras <paulus@au1.ibm.com>,
Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
James Hogan <james.hogan@imgtec.com>,
"James E.J. Bottomley" <jejb@parisc-linux.org>,
Helge Deller <deller@gmx.de>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
"David S. Miller" <davem@davemloft.net>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 8/8] powerpc: Tell about irq stack coverage
Date: Fri, 27 Sep 2013 08:20:46 +1000 [thread overview]
Message-ID: <1380234046.28561.73.camel@pasglop> (raw)
In-Reply-To: <1380212686-25897-9-git-send-email-fweisbec@gmail.com>
On Thu, 2013-09-26 at 18:24 +0200, Frederic Weisbecker wrote:
> Now that powerpc runs irq_exit() under the irq stack,
> let the softirq core know about that so that we spare
> the needless stack switch on irq exit's softirq processing.
>
> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Cc:
> Paul Mackerras <paulus@au1.ibm.com>
> Cc: Ingo Molnar <mingo@kernel.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: H. Peter Anvin <hpa@zytor.com>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Cc: Paul Mackerras <paulus@au1.ibm.com>
> Cc: James Hogan <james.hogan@imgtec.com>
> Cc: James E.J. Bottomley <jejb@parisc-linux.org>
> Cc: Helge Deller <deller@gmx.de>
> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
> Cc: David S. Miller <davem@davemloft.net>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> ---
> arch/powerpc/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 38f3b7e..b365d5c 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -138,6 +138,7 @@ config PPC
> select OLD_SIGSUSPEND
> select OLD_SIGACTION if PPC32
> select HAVE_DEBUG_STACKOVERFLOW
> + select HAVE_IRQ_EXIT_ON_IRQ_STACK
>
> config EARLY_PRINTK
> bool
next prev parent reply other threads:[~2013-09-26 22:40 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-26 16:24 [PATCH 0/8] softirq: Consolidation and stack overrun fix v3 Frederic Weisbecker
2013-09-26 16:24 ` [PATCH 1/8] irq: Force hardirq exit's softirq processing on its own stack Frederic Weisbecker
2013-09-26 16:24 ` [PATCH 2/8] irq: Consolidate do_softirq() arch overriden implementations Frederic Weisbecker
2013-09-26 16:24 ` [PATCH 3/8] irq: Optimize call to softirq on hardirq exit Frederic Weisbecker
2013-09-26 16:24 ` [PATCH 4/8] irq: Improve a bit softirq debugging Frederic Weisbecker
2013-09-26 16:24 ` [PATCH 5/8] irq: Justify the various softirq stack choices Frederic Weisbecker
2013-09-26 16:24 ` [PATCH 6/8] irq: Optimize softirq stack selection in irq exit Frederic Weisbecker
2013-09-26 16:24 ` [PATCH 7/8] x86: Tell about irq stack coverage Frederic Weisbecker
2013-09-26 16:24 ` [PATCH 8/8] powerpc: " Frederic Weisbecker
2013-09-26 22:20 ` Benjamin Herrenschmidt [this message]
2013-09-26 16:43 ` [PATCH 0/8] softirq: Consolidation and stack overrun fix v3 Linus Torvalds
2013-09-26 17:38 ` Frederic Weisbecker
2013-09-30 11:12 ` Frederic Weisbecker
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