Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=35a6ff5417bf94c9e19b6b55a9eb6eea14cc7be7
Commit: 35a6ff5417bf94c9e19b6b55a9eb6eea14cc7be7
Parent: db36cc7d6d9e538481e60fae7f56646b92557526
Author: Ingo Molnar <[EMAIL PROTECTED]>
AuthorDate: Mon Oct 15 17:00:07 2007 +0200
Committer: Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Mon Oct 15 17:00:07 2007 +0200
sched: x86: allow single-depth wchan output
sched.o gets smaller and faster if we compile it with -fomit-frame-pointers,
so make this a config option. The cost is the loss of multi-depth wchan
lookups - but SysRq-T is a sufficient replacement for them anyway, so their
utility is much lower these days.
the size difference is significant:
text data bss dec hex filename
34005 3462 24 37491 9273 sched.o.before
33470 3462 24 36956 905c sched.o.after
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
Signed-off-by: Mike Galbraith <[EMAIL PROTECTED]>
Reviewed-by: Thomas Gleixner <[EMAIL PROTECTED]>
---
arch/i386/Kconfig | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index f1486f8..bf9aafa 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -214,6 +214,17 @@ config X86_ES7000
endchoice
+config SCHED_NO_NO_OMIT_FRAME_POINTER
+ bool "Single-depth WCHAN output"
+ default y
+ help
+ Calculate simpler /proc/<PID>/wchan values. If this option
+ is disabled then wchan values will recurse back to the
+ caller function. This provides more accurate wchan values,
+ at the expense of slightly more scheduling overhead.
+
+ If in doubt, say "Y".
+
config PARAVIRT
bool "Paravirtualization support (EXPERIMENTAL)"
depends on EXPERIMENTAL
-
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