[no subject]

> > I am trying to use 2.4.26 and I believe that they have done something to
> > the threading in the Fedora kernel.  when I reboot on the new kernel all
> > processes that normally would execute under one PID with threads like
> > mysql now have many PIDs.  Not only that but my Apache that I compiled
> > under the Fedora kernel will not run.  It keeps dying for no apparent
> > reason.

> > Any clues?

> 	There was a discussion on another list about threading and the
> kernel name.  Something about if the kernel name ends in .nptl then
> it operates in a different mode with regards to threading.  Some sort
> of RedHat specific magic cookie in the name, I guess.

> 	I haven't tried to run a stock kernel on Fedora Core 1 or 2
> at this time.  I'll see if I can find where that thread was being
> discussed.  That's the only clues I've got on this one.  :-/

	Some references:

	&lt;<a  rel="nofollow" href="http://www.redhat.com/archives/fedora-list/2004-January/msg04789.html";>http://www.redhat.com/archives/fedora-list/2004-January/msg04789.html</a>&gt;
	&lt;<a  rel="nofollow" href="http://fedoranews.org/colin/fnu/week4.shtml";>http://fedoranews.org/colin/fnu/week4.shtml</a>&gt;

	What you are probably seeing is the effect of having &quot;Native
Posix Threading Libraries&quot; support in the kernel (or, rather, not
having it in the stock kernel).

	From the first reference...

]	To be precise, if it finds &lt;= 2.4 kernel without .nptl suffix, FC1 glibc
] issues a dummy syscall when starting every program to find out if that
] kernel supports NPTL.  The .nptl suffix is a magic which helps avoiding this
] syscall.

	So the .nptl extension merely allows glibc to bypass the fake
syscall test.  But it sounds like what your dealing with is the presence
or absence of support for NPTL in the first place (and explains the
variation in behavior).

	Mike
-- 
 Michael H. Warfield    |  (770) 985-6132   |  mhw at WittsEnd.com
  /\/\|=mhw=|\/\/       |  (678) 463-0932   |  <a  rel="nofollow" href="http://www.wittsend.com/mhw/";>http://www.wittsend.com/mhw/</a>
  NIC whois:  MHW9      |  An optimist believes we live in the best of all
 PGP Key: 0xDF1DD471    |  possible worlds.  A pessimist is sure of it!
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 307 bytes
Desc: not available



</pre>
<!--X-Body-of-Message-End-->
<!--X-MsgBody-End-->
<!--X-Follow-Ups-->
<hr>
<!--X-Follow-Ups-End-->
<!--X-References-->
<ul><li><strong>References</strong>:
<ul>
<li><strong><a name="00251" href="msg00251.html">[ale] Fedora 1 kernel upgrade</a></strong>
<ul><li><em>From:</em> cfowler at outpostsentinel.com (Chris Fowler)</li></ul></li>
<li><strong><a name="00252" href="msg00252.html">[ale] Fedora 1 kernel upgrade</a></strong>
<ul><li><em>From:</em> mhw at wittsend.com (Michael H. Warfield)</li></ul></li>
</ul></li></ul>
<!--X-References-End-->
<!--X-BotPNI-->
<ul>
<li>Prev by Date:
<strong><a href="msg00256.html">[ale] Quiet</a></strong>
</li>
<li>Next by Date:
<strong><a href="msg00258.html">[ale] Fedora 1 kernel upgrade</a></strong>
</li>
<li>Previous by thread:
<strong><a href="msg00259.html">[ale] Fedora 1 kernel upgrade</a></strong>
</li>
<li>Next by thread:
<strong><a href="msg00258.html">[ale] Fedora 1 kernel upgrade</a></strong>
</li>
<li>Index(es):
<ul>
<li><a href="maillist.html#00257"><strong>Date</strong></a></li>
<li><a href="threads.html#00257"><strong>Thread</strong></a></li>
</ul>
</li>
</ul>

<!--X-BotPNI-End-->
<!--X-User-Footer-->
<!--X-User-Footer-End-->
</body>
</html>