From: Anton Blanchard <anton@samba.org>
To: benh@kernel.crashing.org
Cc: linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 5/6] powerpc: Disable HCALL_STATS by default
Date: Tue, 27 Oct 2009 15:51:57 +1100 [thread overview]
Message-ID: <20091027045157.GF3085@kryten> (raw)
In-Reply-To: <20091027045109.GE3085@kryten>
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>
---
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
next prev parent reply other threads:[~2009-10-27 4:51 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-27 4:47 [PATCH 1/6] powerpc: tracing: Add powerpc tracepoints for interrupt entry and exit Anton Blanchard
2009-10-27 4:49 ` [PATCH 2/6] powerpc: tracing: Add powerpc tracepoints for timer " Anton Blanchard
2009-10-27 4:50 ` [PATCH 3/6] powerpc: tracing: Add hypervisor call tracepoints Anton Blanchard
2009-10-27 4:51 ` [PATCH 4/6] powerpc: tracing: Give hypervisor call tracepoints access to arguments Anton Blanchard
2009-10-27 4:51 ` Anton Blanchard [this message]
2009-10-27 4:52 ` [PATCH 6/6] powerpc: Export powerpc_debugfs_root Anton Blanchard
2009-10-27 5:02 ` hypervisor call trace module Anton Blanchard
2009-10-27 22:00 ` [PATCH 1/6] powerpc: tracing: Add powerpc tracepoints for interrupt entry and exit Steven Rostedt
2009-10-27 23:41 ` Benjamin Herrenschmidt
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