Re: [Xen-devel] [PATCH v2] xen/events/fifo: Handle linked events when closing a port

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 31/07/15 14:30, Ross Lagerwall wrote:
> When a channel is closed and the event is still linked into a queue,
> ensure that it is unlinked before completing. If it is not unlinked and
> the port is subsequently reused, events may be missed.
> 
> If the CPU to which the event channel bound is online, spin until the
> event is handled by that CPU. If that CPU is offline, it can't handle
> the event, so clear the event queue during the close, dropping the
> events.
> 
> This fixes missing interrupts (and subsequent disk stalls) when
> offlining a CPU.

Applied to for-linus-4.2 and tagged for stable, thanks.

David

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