linux-kernel - [PATCH 03/40] KVM: MMU: Report spte not found in rmap before BUG()

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Date:	Wed, 10 Feb 2010 19:22:32 +0200
From:	Avi Kivity <avi@...hat.com>
To:	kvm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 03/40] KVM: MMU: Report spte not found in rmap before BUG()

In the past we've had errors of single-bit in the other two cases; the
printk() may confirm it for the third case (many->many).

Signed-off-by: Avi Kivity <avi@...hat.com>
---
 arch/x86/kvm/mmu.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 89a49fb..4f499d7 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -662,6 +662,7 @@ static void rmap_remove(struct kvm *kvm, u64 *spte)
 			prev_desc = desc;
 			desc = desc->more;
 		}
+		pr_err("rmap_remove: %p %llx many->many\n", spte, *spte);
 		BUG();
 	}
 }
-- 
1.6.5.3

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