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

From: Avi Kivity
Date: Thu Jan 21 2010 - 12:47:55 EST

On 01/21/2010 07:32 PM, Michael S. Tsirkin wrote:

Can't you read from the file?
IMO no, the read could block.

But you're in process context. An eventfd never blocks.

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

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