On Fri, 2004-07-02 at 16:09, jono wrote: > testing/unstable 2.4.25 i686 > > When I run a daemon (written for a telephony card) or the expect > application which uses the daemon, they both start with 3 processes. > I've noticed the same behavior with S20xprint and nautilus. > > The same daemon and application on redhat9 (2.4.20-8 i686) starts with > only the one process. Its causing errors in our application so I was > wondering if there was any reason for this and if it is debian specific? > > TIA, please cc direct. Regards, Jono. >
Hi Jono, My memory on this is a little rusty now. However I believe the story goes as follows: With normal versions of the Linux 2.4.x kernel, the "ps" command shows each *thread* as a separate process. The new Linux 2.6.x kernel has a completely rewritten threading implementation and "ps" shows only 1 entry for a multi-threaded process. RedHat has a tradition of distributing fairly heavily patched kernels; I believe that they included the new threading model into the 2.4.x kernel that was included with RH9. I suspect the app you are concerned about is starting *1* process with *3* threads. If that is the case, then what you are seeing on Debian is normal for distributions running 2.4.x kernels. RH9, despite running a 2.4-based kernel behaves more like 2.6.x due to special patches in its kernel version. I remember this because RH9's early adoption of the new threading implementation broke many many applications (eg IBM MQSeries), and I cursed them for it vigorously. Regards, Simon -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
