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Bug 17374

Summary: Make hangs with large values of parallel jobs
Product: [Retired] Red Hat Linux Reporter: John William <jw2357>
Component: makeAssignee: Jakub Jelinek <jakub>
Status: CLOSED DUPLICATE QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 8.0   
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2006-02-21 18:47:45 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description John William 2000-09-09 05:17:26 UTC 
Standard RH6.2 distro with make-3.78.1-4.

Passing make a large number of jobs, either as "-j n" or as "--jobs==n" 
will hang make for large values of "n". The magic number appears to be 
4098 on my test system. "make -j 4097" works correctly. "make -j 4098" 
hangs.

Note that make itself hangs - this isn't a problem with trying to spawn 
too many processes. Make will hang even when all targets are up-to-date.
Comment 1 Bill Nottingham 2000-09-12 23:04:05 UTC 
It fills up the pipe it uses (one character from each job, 4096
byte standard pipe buffer.)
Comment 2 Alan Cox 2002-12-15 01:39:23 UTC 
Still present in 8.0 - make should be erroring this
Comment 3 John William 2004-12-12 23:00:38 UTC 

*** This bug has been marked as a duplicate of 142691 ***
Comment 4 Red Hat Bugzilla 2006-02-21 18:47:45 UTC 
Changed to 'CLOSED' state since 'RESOLVED' has been deprecated.