linux-kernel - Re: [PATCH] x86-32: always use irq stacks

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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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