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

From: Avi Kivity
Date: Thu Jan 21 2010 - 12:56:21 EST

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.

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