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

Avi Kivity
2010-01-21T17:56:09Z

On 01/21/2010 07:45 PM, Michael S. Tsirkin wrote:
>
>> But you're in process context. An eventfd never blocks.
>>
> Yes it blocks if counter is 0. And we don't know
> it's not 0 unless we read :) catch-22.
>

Ah yes, I forgot.

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