CELF Project Proposal/Add -ffunction-sections support to Linux kernel - Revision history

Peter Huewe: it's own -> its own

2011-10-27T22:29:03Z

it's own -> its own

Tim Bird at 01:28, 15 January 2010

2010-01-15T01:28:01Z

Tim Bird: Created page with '; Summary : Add -ffunctio-sections support to Linux kernel ; Proposer: Tim Bird == Description == "Function sections" is a technique for reducing the size of the kernel image. …'

2010-01-15T01:27:46Z

Created page with '; Summary : Add -ffunctio-sections support to Linux kernel ; Proposer: Tim Bird == Description == "Function sections" is a technique for reducing the size of the kernel image. …'

New page

; Summary : Add -ffunctio-sections support to Linux kernel

; Proposer: Tim Bird

== Description ==
"Function sections" is a technique for reducing the size of the kernel image. It does this by placing each function into it's own linker section, which then allows the linker to do better dead code removal.

Denys reported that usage of this technique got him about a 10% reduction in kernel size.

== Related work ==
* See [[Function_sections]]

; Scope : a few weeks

== Comments ==
Patches for this were submitted by Denys Vlasenko, but were not mainlined.

Tim Abbot writes:

There's actually been substantial progress since then -- in the thread
Denys referenced, Sam Ravnborg suggested we go about things differently,
first cleaning up all the references to these sections to use standard
macros, and then renaming the sections. The last of my patches for this
cleanup was merged into mainline a few days ago.

In a month or so, I'm planning to start sending RFCs for a much simpler
patch series targeted at the 2.6.34 merge window that will enable building
the kernel with -ffunction-sections -fdata-sections; I expect that the new
patch series will have much less difficulty being merged.
----

[[Category:Project proposals]]

← Older revision		Revision as of 01:28, 15 January 2010
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 == Description ==
-"Function sections" is a technique for reducing the size of the kernel image. It does this by placing each function into it's own linker section, which then allows the linker to do better dead code removal.
+"Function sections" is a technique for reducing the size of the kernel image. It does this by placing each function into its own linker section, which then allows the linker to do better dead code removal.
 Denys reported that usage of this technique got him about a 10% reduction in kernel size.