2.6.0-test3 and dnotify

2.6.0-test3 and dnotify

[Ronald Kuetemeier]

First, sorry if you replied to my other mail. I forgot to activate the
e-mail address, should work now.

I run some of my programs on 2.6.0-test3 this morning, before my coffee
..., anyhow seems dnotify isn't working any more. I compiled the example
from <linux-2.6.0-test3>/Documentation/dnotify.txt this also doesn't
work anymore.
SMP <2 PIII> system.
As usual CC me, if possible :-).
Ronald

Re: 2.6.0-test3 and dnotify

[Stephen Rothwell]

On 12 Aug 2003 10:28:47 -0600 Ronald Kuetemeier <ron_ker@kuetemeier.com> wrote:
>
> I run some of my programs on 2.6.0-test3 this morning, before my coffee
> ..., anyhow seems dnotify isn't working any more. I compiled the example
> from <linux-2.6.0-test3>/Documentation/dnotify.txt this also doesn't
> work anymore.
> SMP <2 PIII> system.
> As usual CC me, if possible :-).

Try using (SIGRTMIN + 1) instead of SGIRTMIN.  At some point glibc or bash
(or something) started blocking SIGRTMIN by default ...

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

[PATCH][DOCO] Re: 2.6.0-test3 and dnotify

[Stephen Rothwell]

Linus,

On 12 Aug 2003 10:28:47 -0600 Ronald Kuetemeier <ron_ker@kuetemeier.com> wrote:
>
> I run some of my programs on 2.6.0-test3 this morning, before my coffee
> ..., anyhow seems dnotify isn't working any more. I compiled the example
> from <linux-2.6.0-test3>/Documentation/dnotify.txt this also doesn't
> work anymore.

This has been asked a couple of times, so can you please apply the
following documentation patch?
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff -ruN 2.6.0-test3/Documentation/dnotify.txt 2.6.0-test3.sfr.1/Documentation/dnotify.txt
--- 2.6.0-test3/Documentation/dnotify.txt	2001-04-07 03:42:48.000000000 +1000
+++ 2.6.0-test3.sfr.1/Documentation/dnotify.txt	2003-08-13 14:32:14.000000000 +1000
@@ -32,7 +32,8 @@
 
 Preferably the application will choose one of the real time signals
 (SIGRTMIN + <n>) so that the notifications may be queued.  This is
-especially important if DN_MULTISHOT is specified.
+especially important if DN_MULTISHOT is specified.  Note that SIGRTMIN
+is often blocked, so it is better to use (at least) SIGRTMIN + 1.
 
 Implementation expectations (features and bugs :-))
 ---------------------------
@@ -78,10 +79,10 @@
 		act.sa_sigaction = handler;
 		sigemptyset(&act.sa_mask);
 		act.sa_flags = SA_SIGINFO;
-		sigaction(SIGRTMIN, &act, NULL);
+		sigaction(SIGRTMIN + 1, &act, NULL);
 		
 		fd = open(".", O_RDONLY);
-		fcntl(fd, F_SETSIG, SIGRTMIN);
+		fcntl(fd, F_SETSIG, SIGRTMIN + 1);
 		fcntl(fd, F_NOTIFY, DN_MODIFY|DN_CREATE|DN_MULTISHOT);
 		/* we will now be notified if any of the files
 		   in "." is modified or new files are created */

Re: [PATCH][DOCO] Re: 2.6.0-test3 and dnotify

[Ronald Kuetemeier]

Stephan, 
I most certainly will give it a shot.  But why is it working under 2.4.X
iff glibc or bash are blocking SIGRTMIN, they should also block under
2.4.x or is there a bug in 2.4.x which prevents it?

Thanks for your help,
Ronald



On Tue, 2003-08-12 at 22:37, Stephen Rothwell wrote:
> Linus,
> 
> On 12 Aug 2003 10:28:47 -0600 Ronald Kuetemeier <ron_ker@kuetemeier.com> wrote:
> >
> > I run some of my programs on 2.6.0-test3 this morning, before my coffee
> > ..., anyhow seems dnotify isn't working any more. I compiled the example
> > from <linux-2.6.0-test3>/Documentation/dnotify.txt this also doesn't
> > work anymore.
> 
> This has been asked a couple of times, so can you please apply the
> following documentation patch?