From: Linus Torvalds <torvalds@linux-foundation.org>
To: David Miller <davem@davemloft.net>
Cc: mingo@elte.hu, peterz@infradead.org, tglx@linutronix.de,
andi@firstfloor.org, x86@kernel.org,
linux-kernel@vger.kernel.org, jesse.brandeburg@intel.com
Subject: Re: [PATCH] Prevent nested interrupts when the IRQ stack is near overflowing v2
Date: Thu, 25 Mar 2010 13:40:43 -0700 (PDT) [thread overview]
Message-ID: <alpine.LFD.2.00.1003251339470.3721@i5.linux-foundation.org> (raw)
In-Reply-To: <20100325.124220.258885098.davem@davemloft.net>
On Thu, 25 Mar 2010, David Miller wrote:
>
> FWIW, I'm currently using IRQF_DISABLED for virtual network
> device interrupts on sparc64 as a workaround for some stack
> overflow issues.
>
> This change will just force me to work harder to find out a better way
> to fix the problem, so don't let my issue hold this back, it's just
> an FYI...
You missed the point of the patch.
It makes _all_ interrupts act like IRQF_DISABLED. So it actually fixes
your issue, by making IRQF_DISABLE a no-op - not because it doesn't exist
any more, but because the non-IRQF_DISABLED case would not exist any more.
Linus
next prev parent reply other threads:[~2010-03-25 20:45 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-24 19:02 Andi Kleen
2010-03-24 20:42 ` Thomas Gleixner
2010-03-24 23:08 ` Thomas Gleixner
2010-03-25 0:36 ` Andi Kleen
2010-03-25 1:46 ` Thomas Gleixner
2010-03-25 9:37 ` Andi Kleen
2010-03-25 11:09 ` Thomas Gleixner
2010-03-25 12:11 ` Andi Kleen
2010-03-25 13:17 ` Thomas Gleixner
2010-03-25 13:32 ` Andi Kleen
2010-03-25 14:16 ` Thomas Gleixner
2010-03-25 15:38 ` Andi Kleen
2010-03-25 16:06 ` Alan Cox
2010-03-25 16:13 ` Linus Torvalds
2010-03-25 16:17 ` Linus Torvalds
2010-03-25 16:27 ` Ingo Molnar
2010-03-25 16:33 ` Ingo Molnar
2010-03-25 18:27 ` Andi Kleen
2010-03-26 4:55 ` Eric W. Biederman
2010-03-25 16:52 ` Thomas Gleixner
2010-03-25 17:47 ` Peter Zijlstra
2010-03-25 18:01 ` Linus Torvalds
2010-03-25 18:21 ` Peter Zijlstra
2010-03-25 18:23 ` Peter Zijlstra
2010-03-25 18:44 ` Andi Kleen
2010-03-25 19:01 ` Ingo Molnar
2010-03-25 18:29 ` Ingo Molnar
2010-03-25 19:10 ` Linus Torvalds
2010-03-25 19:42 ` David Miller
2010-03-25 20:40 ` Linus Torvalds [this message]
2010-03-26 3:33 ` David Miller
2010-03-25 20:51 ` Ingo Molnar
2010-03-25 20:53 ` Linus Torvalds
2010-03-26 6:10 ` Andi Kleen
2010-03-25 10:50 ` Alan Cox
2010-03-25 11:16 ` Thomas Gleixner
2010-03-25 11:59 ` Alan Cox
2010-03-25 12:00 ` Andi Kleen
2010-03-25 11:57 ` Andi Kleen
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