Re: [GIT] Experimental threaded udev

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On Mon, Jun 1, 2009 at 15:46, Alan Jenkins <alan-jenkins@xxxxxxxxxxxxxx> wrote:

>> Right, it's a rlimit, and I think I checked and remember 40.000+
>> signals here. The workers could detect, and re-send a non-queued
>> signal, if needed.
>
> Non-queued signal transmission isn't blocking either.  The signal just gets
> dropped if there's already one in-flight.

Oh, I meant we get an error back, if we can not queue the signal, so
we can re-send it. The rt-signals should be fully reliable regarding
that.

> Ok.  I meant we could send all the completions down the same pipe, which
> wouldn't require lots of FDs.  Before this patch, we were happily sharing
> kernel_monitor->sock between all the child processes.

Ah, I see. Yeah, we share the inotify fd still, I think. We could have
a pie, sure, if it's better for some reason. Scott mentioned signalfd,
which we could look at too. Rt-signals might be bit more efficient
than a pipe, we should find that out.

>> Maybe we can set the event to QUEUED, when a worker dies with an event
>> attached.
>>
>
> Retry the event, you mean?  How many times? :-).

Not sure. :)

> The code looked like you freed the worker, but left the event RUNNING, and
> it would never be released.  I would delete the event instead, just like the
> old system.
>
> I haven't read V2 yet though, maybe you fixed it.

I just set it back to QUEUED for now. Not sure if droppin git or
re-trying it a few times would be better.

Thanks,
Kay
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