linux-kernel - [PATCH 5/5] KVM: MMU: remove oos

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Message-ID: <4ED381E6.4070309@linux.vnet.ibm.com>
Date:	Mon, 28 Nov 2011 20:43:18 +0800
From:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
To:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
CC:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: [PATCH 5/5] KVM: MMU: remove oos_shadow parameter

The unsync code should be stable now, maybe it is the time to remove this
parameter to cleanup the code a little bit

Signed-off-by: Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
---
 Documentation/kernel-parameters.txt |    3 ---
 arch/x86/kvm/mmu.c                  |    5 -----
 2 files changed, 0 insertions(+), 8 deletions(-)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index a0c5c5f..7402a24 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1178,9 +1178,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 	kvm.ignore_msrs=[KVM] Ignore guest accesses to unhandled MSRs.
 			Default is 0 (don't ignore, but inject #GP)

-	kvm.oos_shadow=	[KVM] Disable out-of-sync shadow paging.
-			Default is 1 (enabled)
-
 	kvm.mmu_audit=	[KVM] This is a R/W parameter which allows audit
 			KVM MMU at runtime.
 			Default is 0 (off)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 262a3af..b1178d1 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -93,9 +93,6 @@ static int dbg = 0;
 module_param(dbg, bool, 0644);
 #endif

-static int oos_shadow = 1;
-module_param(oos_shadow, bool, 0644);
-
 #ifndef MMU_DEBUG
 #define ASSERT(x) do { } while (0)
 #else
@@ -2196,8 +2193,6 @@ static int mmu_need_write_protect(struct kvm_vcpu *vcpu, gfn_t gfn,
 			return 1;

 		if (!need_unsync && !s->unsync) {
-			if (!oos_shadow)
-				return 1;
 			need_unsync = true;
 		}
 	}
-- 
1.7.7.3

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