Re: [Xen-devel] [PATCH] x86/IRQ: fix create_irq() after c/s 24068:6928172f7ded

[Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>]

On 11/04/2011 12:52 PM, Jan Beulich wrote:
> init_one_irq_desc() must be called with interrupts enabled (as it may
> call functions from the xmalloc() group). Rather than mis-using
> vector_lock to also protect the finding of an unused IRQ, make this
> lockless through using cmpxchg(), and obtain the lock only around the
> actual assignment of the vector.
Works for me (machine coming up again).

Juergen

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