From: Joerg Roedel <joerg.roedel@amd.com>
Date: Wed, 27 Aug 2008 12:18:43 +0000 (+0200)
Subject: KVM: SVM: fix random segfaults with NPT enabled
X-Git-Tag: v2.6.27-rc7~54^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=44874f84918e37b64bec6df1587e5fe2fdf6ab62;p=pandora-kernel.git

KVM: SVM: fix random segfaults with NPT enabled

This patch introduces a guest TLB flush on every NPF exit in KVM. This fixes
random segfaults and #UD exceptions in the guest seen under some workloads
(e.g. long running compile workloads or tbench). A kernbench run with and
without that fix showed that it has a slowdown lower than 0.5%

Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@qumranet.com>
---

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