Bug 173202 - CONFIG_DEBUG_INFO=y by default
Summary: CONFIG_DEBUG_INFO=y by default
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel
Version: 4.0
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: ---
: ---
Assignee: Dave Jones
QA Contact: Brian Brock
URL:
Whiteboard:
Keywords:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2005-11-14 22:02 UTC by Jean Blouin
Modified: 2015-01-04 22:23 UTC (History)
2 users (show)

(edit)
Clone Of:
(edit)
Last Closed: 2005-11-15 04:17:06 UTC


Attachments (Terms of Use)

Description Jean Blouin 2005-11-14 22:02:30 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.7.10) Gecko/20050719 Red Hat/1.0.6-1.4.1 Firefox/1.0.6

Description of problem:
The default config file sets

the following config options:

CONFIG_DEBUG_INFO=y
and 
CONFIG_CC_OPTIMIZE_FOR_SIZE=y

this ends up compiling most of the files with 
-g -Os

wouldn't it be preferable for performance to compile with both this options unsetted? Than the code would be compiled with -O2?


Version-Release number of selected component (if applicable):
kernel-smp-2.6.9-22.EL

How reproducible:
Always

Steps to Reproduce:
1.compile the kernel with make bzImage V=1
2.see that most files are compiled with -g -Os
3.
  

Actual Results:  most kernel files are compiled with -g -Os

Expected Results:  if you unsetted the CONFIG_DEBUG_INFO and the CONFIG_CC_OPTIMIZE_FOR_SIZE
then most file will be compile with -O2

Additional info:

Comment 1 Dave Jones 2005-11-15 04:17:06 UTC
debug info is set so that the debugging info can get stripped out to the
-debuginfo rpms.

-Os is used because cache footprint is more important on modern processors than
microoptimisations.



Note You need to log in before you can comment on or make changes to this bug.