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Date: Tue, 9 Dec 2008 19:04:03 +0000 From: Alan Cox <alan@...rguk.ukuu.org.uk> To: Casey Dahlin <cdahlin@...hat.com> Cc: Linux Kernel <linux-kernel@...r.kernel.org>, Scott James Remnant <scott@...split.com> Subject: Re: [RFC PATCH] waitfd: file descriptor to wait on child processes > > 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. > 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? I don't know but I think it would be the better approach to find it. That also separates notification of state to parents from the general problem of wanting to know when a service has died, which seems to be an ever more common point of interest on the desktop in particular. File content change notification for /proc is hard because the contents don't exist in the normal way and get updated but can be done if there is a wait queue for the job. Actual changes to structure (new directories etc) is in part a similar problem but there are clear points already in existence when the proc nodes are created/destroyed and thus notification can occur. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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