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Message-ID: <alpine.LFD.2.00.1005261446290.2995@localhost.localdomain>
Date: Wed, 26 May 2010 14:47:07 +0200 (CEST)
From: Thomas Gleixner <tglx@...utronix.de>
To: Christoph Hellwig <hch@....de>
cc: x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86-32: always use irq stacks
On Wed, 26 May 2010, Christoph Hellwig wrote:
>
> IRQ stacks provide much better safety against unexpected stack use from
> interrupts, at the minimal downside of slightly higher memory usage.
> Enable irq stacks also for the default 8k stack to minimize the problem
> of stack overflows through interrupt activity.
>
> This is what x86-64 and various other architectures already do.
We got rid of nested interrupts, so is this really a concern anymore ?
Thanks,
tglx
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