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<TITLE>The Answer Guy 50: error: Interrupted system call</TITLE>
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<H4>"The Linux Gazette...<I>making Linux just a little more fun!</I>"</H4>
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<H4>By James T. Dennis,
<a href="mailto:linux-questions-only@ssc.com">linux-questions-only@ssc.com</a><BR>
LinuxCare,
<A HREF="http://www.linuxcare.com/">http://www.linuxcare.com/</A>
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
height="50" width="60" alt="(?) " border="0"
>error: Interrupted system call</H3>
<p><strong>From Robert Richardson on Fri, 07 Jan 2000
</strong></p>
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error: Interrupted system call
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<P><STRONG>
Hi James
</STRONG></P>
<P><STRONG>
I am not sure who I should direct this question to: I have Dell
5100 workstation running RedHat Linux 6.0 (Kernel 2.2.5-15),
setup with NTP to provide time for LAN. It works great but I
sometimes, see in the the NTP log file, the message "<tt>29 Dec
16:28:33 ntpd[634]: select(11, #---#--#---, 0L, 0L, &amp;0.000000)
error: Interrupted system call</tt>". This causes no problems, as
far as I can tell, but is there anything I should be concerned
about. I will appreciate any information you can provide.
Attached is a copy of the NTP log file. Thanks
</STRONG></P>
<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
HEIGHT="28" WIDTH="50" BORDER="0"
>
I'm not sure what's causing this. However, I'd
suggest a couple of rather simple steps:
</BLOCKQUOTE>
<BLOCKQUOTE>
First there was a bug on the default XFree86 servers
and some of the video cards that were shipping with
some Dell systems. The symptom was a very slow system
clock. The solution was to upgrade the XFree86 RPMs.
</BLOCKQUOTE>
<BLOCKQUOTE>
Second, the 2.2.5 kernels that shipped with
<A HREF="http://www.redhat.com/">Red Hat</A>
6.0 were pretty bad (as Linux kernels go). I'd
strongly recommend an upgrade to the 2.2.14 kernels
(which are MUCH more stable).
</BLOCKQUOTE>
<BLOCKQUOTE>
So download the kernel sources and build it. I don't
recommend using the RPM (or any package managment
system) for doing kernel upgrades. I just use the
main sources and build them using the Makefiles
(usually using <tt>make menuconfig</tt>).
</BLOCKQUOTE>
<BLOCKQUOTE>
In this case I suspect a combination of an XFree86
bug and a kernel bug which is causing the problems
with the system clock. <tt>xntpd</tt> could easily be
sensitive to these sorts of things.
</BLOCKQUOTE>
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<H5 align="center"><a href="http://www.linuxgazette.com/copying.html"
>Copyright &copy;</a> 2000, James T. Dennis
<BR>Published in <I>The Linux Gazette</I> Issue 50 February 2000</H5>
<H6 ALIGN="center">HTML transformation by
<A HREF="mailto:star@starshine.org">Heather Stern</a> of
Starshine Technical Services,
<A HREF="http://www.starshine.org/">http://www.starshine.org/</A>
</H6>
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