📄 migrating to linux kernel 2_6 -- part 5 migrating apps to the 2_6 kernel and nptl.htm
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<TH width="100%" bgColor=#fcec9c><FONT
face=Arial,Helvetica size=2>Migrating to Linux kernel
2.6 -- Part 5: Migrating apps to the 2.6 kernel and
NPTL</FONT></TH></TR>
<TR>
<TD width="100%" height=20><FONT face=Arial,Helvetica
size=2>by Peter Dibble and Willian von Hagen (Mar. 11,
2004)</FONT><BR><BR><FONT face=Arial,Helvetica
size=3><B>Foreword</B> -- For most application
developers, changes between the 2.4 and 2.6 kernel
families have little direct impact. However, kernel and
system changes that affect how applications spawn and
manage other processes and threads are a significant
exception to this rule. This whitepaper discusses topics
related to migrating existing applications to the 2.6
kernel and the Native POSIX Threading Library (NPTL).
<BR><BR>This paper is the last in a <A
href="http://linuxdevices.com/articles/AT6753699732.html#series"><U>series</U></A>
of articles from TimeSys on migrating to the 2.6 Linux
kernel. Material is largely vendor-neutral.
<BR><BR>Enjoy! . . .<BR><BR>
<HR>
<BR>
<CENTER><B>Migrating applications to the 2.6 kernel and
NPTL</B></CENTER><BR>For most application developers,
the majority of the changes made to the Linux kernel
between the 2.4 and 2.6 kernel families have little
direct impact. Most kernel changes only manifest
themselves through increased system performance and
capacity. Kernel and system changes that affect how
applications spawn and manage other processes and
threads are a significant exception to this rule.
<BR><BR>The 2.6 Linux kernel introduces a new, improved
threading model that is implemented through the NPTL.
The adoption of a new threading model has significant
implications for developers, system run-time libraries
such as the GNU C library (glibc), shared application
libraries, and so on. This white paper provides an
overview of basic threading concepts, discusses new and
existing Linux threading models, and then highlights the
sorts of application changes that you might have to make
to existing multi-threaded applications in order to
enable them to work correctly with NPTL under the 2.6
Linux kernel.<BR><BR><B>Threading 101</B><BR><BR>On
multi-processing systems such as Linux, the concept of
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