linux-kernel - [PATCH RFC V6 3/5] kvm guest : Add configuration support to enable debug information for KVM Guests

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Date:	Mon, 23 Apr 2012 15:30:13 +0530
From:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Alexander Graf <agraf@...e.de>,
	Randy Dunlap <rdunlap@...otime.net>, linux-doc@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	KVM <kvm@...r.kernel.org>, Avi Kivity <avi@...hat.com>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	X86 <x86@...nel.org>, Gleb Natapov <gleb@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Virtualization <virtualization@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Cc:	Xen <xen-devel@...ts.xensource.com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	Sasha Levin <levinsasha928@...il.com>
Subject: [PATCH RFC V6 3/5] kvm guest : Add configuration support to enable debug information for KVM Guests

From: Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>

Signed-off-by: Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
Signed-off-by: Suzuki Poulose <suzuki@...ibm.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
---
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 35eb2e4..a9ec0da 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -584,6 +584,15 @@ config KVM_GUEST
 	  This option enables various optimizations for running under the KVM
 	  hypervisor.
 
+config KVM_DEBUG_FS
+	bool "Enable debug information for KVM Guests in debugfs"
+	depends on KVM_GUEST && DEBUG_FS
+	default n
+	---help---
+	  This option enables collection of various statistics for KVM guest.
+   	  Statistics are displayed in debugfs filesystem. Enabling this option
+	  may incur significant overhead.
+
 source "arch/x86/lguest/Kconfig"
 
 config PARAVIRT

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