Thread (13 messages) flat view 13 messages, 2 authors, 2009-09-03

Re: [PATCH 1/9] task_struct: add PF_NONOTIFY for fanotify to use

From: Evgeniy Polyakov <hidden>
Date: 2009-08-28 22:36:25
Also in: linux-fsdevel, lkml

Hi.

On Fri, Aug 28, 2009 at 02:55:42PM -0400, Eric Paris (eparis@redhat.com) wrote:
Since fanotify opens file descriptors inside the kernel for it's listeners
it needs a way to make sure that 2 fanotify listeners, both which listen to
open events do not continuously see each others open events (and get into a
livelock reporting on each other's activity).  This fix is to create a new
tast_struct flags called PF_NONOTIFY.  If this flag is set in a task no
fanotify events will be generated for that task.   fanotify will set the
flag before and open call and will clear it immediately after.
Is there a way to get old-school notifications with the object
information instead of opened file desriptor, which may suffer rlimit
problems and scalability issues with too many opened/closed descriptors?

-- 
	Evgeniy Polyakov
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