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[5/6] powerpc: Disable HCALL_STATS by default

Message ID 20091027045157.GF3085@kryten (mailing list archive)
State Accepted
Delegated to: Paul Mackerras
Headers show

Commit Message

Anton Blanchard Oct. 27, 2009, 4:51 a.m. UTC 
The overhead of HCALL_STATS is quite high and the functionality is very
rarely used. Key statistics are also missing (eg min/max).

With the new hcall tracepoints much more powerful tracing can be done in
a kernel module. Lets disable this by default.

Signed-off-by: Anton Blanchard <anton@samba.org>
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Patch

Index: linux.trees.git/arch/powerpc/configs/pseries_defconfig
===================================================================
--- linux.trees.git.orig/arch/powerpc/configs/pseries_defconfig	2009-10-27 14:56:58.000000000 +1100
+++ linux.trees.git/arch/powerpc/configs/pseries_defconfig	2009-10-27 14:57:11.000000000 +1100
@@ -1683,7 +1683,7 @@  CONFIG_HAVE_ARCH_KGDB=y
 CONFIG_DEBUG_STACKOVERFLOW=y
 # CONFIG_DEBUG_STACK_USAGE is not set
 # CONFIG_DEBUG_PAGEALLOC is not set
-CONFIG_HCALL_STATS=y
+# CONFIG_HCALL_STATS is not set
 # CONFIG_CODE_PATCHING_SELFTEST is not set
 # CONFIG_FTR_FIXUP_SELFTEST is not set
 # CONFIG_MSI_BITMAP_SELFTEST is not set