linux-kernel - [RFC PATCH 0/7] softirq: Consolidation and stack overrun fix v2

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Message-Id: <1380125886-10341-1-git-send-email-fweisbec@gmail.com>
Date:	Wed, 25 Sep 2013 18:17:59 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@....ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	James Hogan <james.hogan@...tec.com>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Helge Deller <deller@....de>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	<stable@...r.kernel.org>
Subject: [RFC PATCH 0/7] softirq: Consolidation and stack overrun fix v2

Hi,

So here is a respin after the discussion we had, plus some more
goodies:

* 1st patch is a short term pure regression fixe, with stable tag etc...
* 2nd patch now also generalize the softirq_count() check
* 4th improve debugging (just hope I did not mistake the !in_interrupt()
assumption in __do_softirq()
* more comments
* introduction of a longer term solution via a new arch symbol for archs
to tell about irq_exit() stack coverage.

Thanks.

Frederic Weisbecker (7):
  irq: Force hardirq exit's softirq processing on its own stack
  irq: Consolidate do_softirq() arch overriden implementations
  irq: Optimize call to softirq on hardirq exit
  irq: Improve a bit softirq debugging
  irq: Justify the various softirq stack choices
  irq: Optimize softirq stack selection in irq exit
  x86: Tell about irq stack coverage

 arch/metag/kernel/irq.c    | 52 ++++++++++++++++--------------------------
 arch/parisc/kernel/irq.c   | 17 ++------------
 arch/powerpc/kernel/irq.c  | 17 +-------------
 arch/s390/kernel/irq.c     | 52 +++++++++++++++++-------------------------
 arch/sh/kernel/irq.c       | 57 +++++++++++++++++-----------------------------
 arch/sparc/kernel/irq_64.c | 31 ++++++++-----------------
 arch/x86/include/asm/irq.h |  4 ++++
 arch/x86/kernel/entry_64.S |  4 ++--
 arch/x86/kernel/irq_32.c   | 30 +++++++-----------------
 arch/x86/kernel/irq_64.c   | 21 -----------------
 include/linux/interrupt.h  | 11 +++++++++
 kernel/softirq.c           | 40 ++++++++++++++++++++++++--------
 12 files changed, 130 insertions(+), 206 deletions(-)

-- 
1.8.3.1

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