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

Avi Kivity
2010-01-21T17:33:06Z

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.