From: Andreas Gruenbacher <agruen@suse.de>
To: Matt Helsley <matthltc@us.ibm.com>
Cc: Matthew Helsley <matt.helsley@gmail.com>,
Eric Paris <eparis@redhat.com>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
viro@zeniv.linux.org.uk, hch@infradead.org,
containers@lists.linux-foundation.org,
Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
Oleg Nesterov <oleg@redhat.com>
Subject: Re: [PATCH 2/4] fanotify: Add pids to events
Date: Sat, 16 Jan 2010 23:53:45 +0100 [thread overview]
Message-ID: <201001162353.45800.agruen@suse.de> (raw)
In-Reply-To: <20100115212146.GA3714@count0.beaverton.ibm.com>
On Friday 15 January 2010 10:21:46 pm Matt Helsley wrote:
> On Fri, Jan 15, 2010 at 04:12:09PM +0100, Andreas Gruenbacher wrote:
> > > 2. If the event recipient does a clone and enters a new pidns the pid
> > > number will be incorrect without any indication.
> >
> > No, if a process has a pid within the listener's namespace the listener
> > will see this pid; otherwise, the resulting pid value is 0.
>
> So the pid reference is resolved at read(), correct? If so then that's
> fine. (Otherwise I'd think the values could still become stale).
Yes. Note that for non-blocking events, there is no guarantee that the
triggering process still runs when the event is consumed though.
Andreas
next prev parent reply other threads:[~2010-01-16 22:54 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-02 14:14 [PATCH 1/4] fanotify: create_fd cleanup Eric Paris
2009-12-02 14:14 ` [PATCH 2/4] fanotify: Add pids to events Eric Paris
[not found] ` <20091202141458.12819.96170.stgit-E+B5uJFuEZf0UfVguI6niVaTQe2KTcn/@public.gmane.org>
2010-01-15 4:41 ` Matthew Helsley
2010-01-15 4:41 ` Matthew Helsley
2010-01-15 4:41 ` Matthew Helsley
[not found] ` <6a12d2f31001142041j7f917b07l1e1a728790175321-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-01-15 15:12 ` Andreas Gruenbacher
2010-01-15 15:12 ` Andreas Gruenbacher
[not found] ` <201001151612.10032.agruen-l3A5Bk7waGM@public.gmane.org>
2010-01-15 21:21 ` Matt Helsley
2010-01-15 21:21 ` Matt Helsley
2010-01-16 22:53 ` Andreas Gruenbacher [this message]
2010-01-17 3:44 ` Matt Helsley
[not found] ` <201001162353.45800.agruen-l3A5Bk7waGM@public.gmane.org>
2010-01-17 3:44 ` Matt Helsley
[not found] ` <20100115212146.GA3714-52DBMbEzqgQ/wnmkkaCWp/UQ3DHhIser@public.gmane.org>
2010-01-16 22:53 ` Andreas Gruenbacher
2009-12-02 14:15 ` [PATCH 3/4] fsnotify: split generic and inode specific mark code Eric Paris
2009-12-02 14:15 ` [PATCH 4/4] fsnotify: clear marks to 0 in fsnotify_init_mark Eric Paris
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