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    SubjectRe: About I/O callbacks ...

    On 22-Jun-2001 Andi Kleen wrote:
    > On Fri, Jun 22, 2001 at 08:55:00AM -0700, Davide Libenzi wrote:
    >> I know about rt signals and SIGIO :) but I can't see how You can queue
    >> signals :
    >> current->sig->action[..]
    >> The action field is an array so if more than one I/O notification is fired
    >> before the SIGIO is delivered, You'll deliver only the last one.
    >> Am I missing something ?
    > Yes. Realtime signals (>=SIGRTMIN) get queued in current->pending.

    An issue with rt signal is the limited number of this resource that
    will force you to have a mapping fd ==> coroutine but this should not be a
    big problem using hash( fd ) = fd

    - Davide

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