Re: [patch 00/11] ANNOUNCE: "Syslets", generic asynchronous system call support

[Andi Kleen]

Ingo Molnar <mingo@xxxxxxx> writes:
> 
> really, what's the point behind aio_cancel()?

The main use case is when you open a file requester on a network
file system where the server is down and you get tired of waiting
and press "Cancel" it should abort the hanging IO immediately.

At least I would appreciate such a feature sometimes.

e.g. the readdir loop could be a syslet (are they powerful
enough to allocate memory for a arbitary sized directory? Probably not) 
and then the cancel button could async_cancel() it.

-Andi

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