Re: [PATCH] x86: Add check for number of available vectors before CPUdown [v2]

[Tony Luck]

On Wed, Dec 18, 2013 at 11:29 AM, Prarit Bhargava <prarit@xxxxxxxxxx> wrote:
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=64791
>
> When a cpu is downed on a system, the irqs on the cpu are assigned to other cpus.  It is possible, however, that when a cpu is downed there aren't enough free vectors on the remaining cpus to account for the vectors from the cpu that is being downed.
>
> This results in an interesting "overflow" condition where irqs are "assigned" to a CPU but are not handled.

Looks good to me.

Acked-by: Tony Luck <tony.luck@xxxxxxxxx>
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