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SubjectRe: Non-blocking I/O
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> Is there any non-blocking I/O available in Linux ?

Unix has had non blocking I/O since 1978. Man fcntl, selecty and signal

> For e.g., an application sends some read request and does some other work ...
> once the data is available, the drivers wakes up (or sends some signal) the
> user application.

Yep


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