[Xen-devel] Re: [PATCH] fix pgd_lock deadlock

[Rik van Riel <riel@xxxxxxxxxx>]

On 02/16/2011 09:49 AM, Andrea Arcangeli wrote:

> Subject: fix pgd_lock deadlock
>
> From: Andrea Arcangeli<aarcange@xxxxxxxxxx>
>
> It's forbidden to take the page_table_lock with the irq disabled or if there's
> contention the IPIs (for tlb flushes) sent with the page_table_lock held will
> never run leading to a deadlock.
>
> Apparently nobody takes the pgd_lock from irq so the _irqsave can be removed.
>
> Signed-off-by: Andrea Arcangeli<aarcange@xxxxxxxxxx>

Acked-by: Rik van Riel <riel@xxxxxxxxxx>

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