Re: busyloop in sigchld_handler

[Andreas Schwab]

Sam Steingold <address@hidden> writes:

> wait3 is a system call, which, when invoked in a loop, prevents the
> kernel from doing anything else (in this case, sending SIGCHLD to
> emacs). sleep allows the kernel some time to pass the signal.

I don't find this explanation convincing at all.  Since the system call is
made _inside_ the signal handler, the signal is actually blocked here, so
it cannot be delivered anyway.

Andreas.

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Andreas Schwab, SuSE Labs, address@hidden
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