Re: [RFC PATCH] waitfd: file descriptor to wait on child processes

[Casey Dahlin <cdahlin@redhat.com>]

Alan Cox wrote:
>> prototype for a fourth: waitfd. It pretty much does what the name 
>> suggests: reading from it yields a series of status ints (as would be 
>> written into the second argument of waitpid) for child processes that 
>> have changed state. It takes essentially the same arguments as waitpid 
>> (for now) and supports the same set of features.
>>     
>
> This propogates the fundamental braindamage of waitpid - the fact the
> notification only works on child process trees.
>
> Here is a more elegant suggestion - use epoll, inotify and friends  fully
> on /proc process nodes.
>
> Alan
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
>   
Last I checked inotify was not supported in /proc, or at least most of 
it. What kind of work load is it to change that?

--CJD