From: Andrea Arcangeli <andrea@suse.de>
To: Oskar Liljeblad <oskar@osk.mine.nu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: directory notifications lost after fork?
Date: Mon, 11 Mar 2002 11:26:52 +0100 [thread overview]
Message-ID: <20020311112652.E10413@dualathlon.random> (raw)
In-Reply-To: <20020310210802.GA1695@oskar>
In-Reply-To: <20020310210802.GA1695@oskar>
On Sun, Mar 10, 2002 at 10:08:02PM +0100, Oskar Liljeblad wrote:
> The code snipper demonstrates what I consider a bug in the
> dnotify facilities in the kernel. After a fork, all registered
> notifications are lost in the process where they originally
> where registered (the parent process). "lost" here means that
> the signal specified with F_SETSIG fcntl no longer is delivered
> when notified.
>
> How to reproduce (tested with 2.4.17):
> gcc -o dnoticebug dnoticebug.c
> dnoticebug & # run in background
> cat dnoticebug.c >/dev/null # "notified" should now be printed
> cat dnoticebug.c >/dev/null # nothing is printed this time
>
> If you comment out the line with fork below, "notified" *will* be
> printed every time you cat dnoticebug.c.
>
> I'm not subscribed to the list so I'd appreciate if you CCed me.
> (Otherwise I'd have to use the archives :) Thanks.
this should fix your problem:
ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.19pre2aa2/00_dnotify-fl_owner-1
Andrea
next prev parent reply other threads:[~2002-03-11 10:26 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-10 21:08 directory notifications lost after fork? Oskar Liljeblad
2002-03-11 7:41 ` Alex Riesen
2002-03-12 12:19 ` Jamie Lokier
2002-03-11 8:50 ` Oskar Liljeblad
2002-03-11 10:20 ` Alex Riesen
2002-03-11 10:26 ` Andrea Arcangeli [this message]
2002-03-12 1:04 ` Stephen Rothwell
2002-03-12 1:20 ` Andrea Arcangeli
2002-03-12 2:59 ` Stephen Rothwell
2002-03-12 4:01 ` Andrea Arcangeli
[not found] <20020311122701.A9718@riesen-pc.gr05.synopsys.com>
2002-03-11 19:34 ` Alex Riesen
-- strict thread matches above, loose matches on Subject: below --
2002-03-12 1:47 Malte Starostik
2002-03-12 12:55 ` Jamie Lokier
2002-03-12 16:37 ` Daniel Phillips
2002-03-12 17:21 ` Jamie Lokier
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