Bug 90995 - not show everything
not show everything
Product: Red Hat Linux
Classification: Retired
Component: procps (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Alexander Larsson
Brian Brock
Depends On:
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Reported: 2003-05-16 04:46 EDT by Sebastian Boinski
Modified: 2007-04-18 12:53 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2003-05-16 09:11:22 EDT
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Description Sebastian Boinski 2003-05-16 04:46:04 EDT
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; Win 9x 4.90)

Description of problem:
I wrote aplication that from main proces fork 5 times. When I tested it on RH 
8.0 ps didn't show one process. According to data in /proc process existed and 
was running (on other platform I didn't have such problems) . When I tested a 
job made by this process everything was OK. I suggestet that there is a bug in 

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. I run my soft in any situation that they gets different PID
2. Everytime there was this same problem

Additional info:
Comment 1 Alexander Larsson 2003-05-16 09:11:22 EDT
The ps in RH8 (and upstream ps too, in later versions) doesn't show subthreads
by default. To get them you need to pass -m to ps. Due to the way threads are
handled in LinuxThreads there is no really 100% correct way to detect what
processes are threads, so it uses a hack. When a child process has identical
name and vmsize as its parent its assumed to be a thread.

This is fixed in RHL9 with the introduction of NPTL.

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