Re: [PATCHv2 1/3] eventfd: allow atomic read and waitqueue remove

From: Avi Kivity
Date: Thu Jan 21 2010 - 12:33:14 EST

On 01/21/2010 07:23 PM, Michael S. Tsirkin wrote:

I agree.

But I think we can solve this in another way in .32: we can clear the
eventfd from irqfd->inject work, which is in process context. The new
stuff is only needed for lockless clearing, no?
No, AFAIK there's no way to clear the counter from kernel without
this patch.

Can't you read from the file?

Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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