linux-kernel - Re: [PATCH] i386: fix suspend/resume with dynamically allocated irq stacks

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Date:	Wed, 2 May 2007 19:25:34 -0700
From:	Bill Irwin <bill.irwin@...cle.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	wli@...omorphy.com
Subject: Re: [PATCH] i386: fix suspend/resume with dynamically allocated irq stacks

On Wed, May 02, 2007 at 06:56:09PM -0700, Jeremy Fitzhardinge wrote:
> +static void __cpuinit __free_irqstack(int cpu, void *stk)
> +{
> +	int i;
> +
> +	if (!cpu)
> +		return;
> +
> +	unmap_vm_area(per_cpu(irqstack_area, cpu));
> +
> +	for (i = 0; i < THREAD_SIZE/PAGE_SIZE; ++i)
> +		__free_page(per_cpu(irqstack_pages, cpu)[i]);
> +}

This will leak the vm_struct and also leave it in the vmlist.
work_free_thread_info() needs to be redone too. It should be

	remove_vm_area( /* unmap and remove the vm_struct from vmlist */ );
	kfree( /* free the vm_struct */ );
	for (i = 0; i < THREAD_SIZE/PAGE_SIZE; ++i)
		__free_page( /* dredge up the appropriate page to free */ );


-- wli
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