Bug 496605

Summary: kernel config: disable CONFIG_CC_OPTIMIZE_FOR_SIZE on s390x
Product: [Fedora] Fedora Reporter: Jan Glauber <jglauber>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: itamar, kernel-maint, quintela
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OS: Linux   
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Last Closed: 2009-04-20 17:52:33 UTC Type: ---
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Description Jan Glauber 2009-04-20 10:26:14 UTC 
CONFIG_CC_OPTIMIZE_FOR_SIZE should be disabled on s390/s390x.

Rationale: CONFIG_CC_OPTIMIZE_FOR_SIZE has a negative performance impact
on s390x. Network benchmarks show that this option costs ~ 3% performance
since the compiler generates non optimal code for instance for memcpy.
Comment 1 Dave Jones 2009-04-20 17:52:33 UTC 
changed in cvs.