linux-kernel - Re: epoll and shared fd's

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Message-ID: <cfd18e0f0802280708r26fc88ch5a488eb8bc1227c5@mail.gmail.com>
Date:	Thu, 28 Feb 2008 16:08:56 +0100
From:	"Michael Kerrisk" <mtk.manpages@...glemail.com>
To:	Valdis.Kletnieks@...edu
Cc:	7eggert@....de, "Davide Libenzi" <davidel@...ilserver.org>,
	"Pierre Habouzit" <madcoder@...ian.org>,
	lkml <linux-kernel@...r.kernel.org>,
	"Eric Dumazet" <dada1@...mosbay.com>,
	"Marc Lehmann" <schmorp@...morp.de>,
	"David Schwartz" <davids@...master.com>
Subject: Re: epoll and shared fd's

On Thu, Feb 28, 2008 at 2:53 PM,  <Valdis.Kletnieks@...edu> wrote:
> On Tue, 26 Feb 2008 19:16:30 +0100, Bodo Eggert said:
>  > Michael Kerrisk <mtk.manpages@...glemail.com> wrote:
>
>
> > >               file  handle  have  been  closed.  This means that
>  > >               even after a file descriptor that is  part  of  an
>  > >               epoll  set has been closed, events may be reported
>  > >               for that file descriptor if other file descriptors
>  > >               referring  to the same underlying file description
>  > >               remain open.
>
>  Is it worth making special mention of the case where a process gets events
>  for a FD that it has closed, because a parent or child process still has
>  an inherited copy of the FD still open?

I'm not sure -- perhaps under a BUGS section?  Did you read my reply
about this point in the thread "Re: epoll design problems with common
fork/exec patterns"?

Cheers,

Michael


-- 
Michael Kerrisk
Maintainer of the Linux man-pages project
http://www.kernel.org/doc/man-pages/
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