From: zhangyanfei <zhangyanfei@cn.fujitsu.com>
To: x86@kernel.org, kexec@lists.infradead.org,
Avi Kivity <avi@redhat.com>,
mtosatti@redhat.com
Cc: linux-kernel@vger.kernel.org,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: [PATCH v2 0/2] x86: clear vmcss on all cpus when doing kdump if necessary
Date: Thu, 25 Oct 2012 18:47:27 +0800 [thread overview]
Message-ID: <508918BF.8040500@cn.fujitsu.com> (raw)
In-Reply-To: <5080E813.7030302@cn.fujitsu.com>
Would anyone help review the patch, and give some comments, please ?
Avi?
于 2012年10月19日 13:41, Zhang Yanfei 写道:
> Currently, kdump just makes all the logical processors leave VMX operation by
> executing VMXOFF instruction, so any VMCSs active on the logical processors may
> be corrupted. But, sometimes, we need the VMCSs to debug guest images contained
> in the host vmcore. To prevent the corruption, we should VMCLEAR the VMCSs before
> executing the VMXOFF instruction.
>
> The patch set provides a way to VMCLEAR vmcss related to guests on all cpus before
> executing the VMXOFF when doing kdump. This is used to ensure the VMCSs in the
> vmcore updated and non-corrupted.
>
> Changelog from v1 to v2:
> 1. remove the sysctl and clear VMCSs unconditionally.
>
> zhangyanfei (2):
> x86/kexec: VMCLEAR vmcss on all cpus if necessary
> KVM: make crash_clear_loaded_vmcss valid when loading kvm_intel
> module
>
> arch/x86/include/asm/kexec.h | 2 ++
> arch/x86/kernel/crash.c | 27 +++++++++++++++++++++++++++
> arch/x86/kvm/vmx.c | 9 +++++++++
> 3 files changed, 38 insertions(+), 0 deletions(-)
> --
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prev parent reply other threads:[~2012-10-25 10:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-19 5:41 [PATCH v2 0/2] x86: clear vmcss on all cpus when doing kdump if necessary Zhang Yanfei
2012-10-19 5:44 ` [PATCH 1/2] x86/kexec: VMCLEAR vmcss on all cpus " Zhang Yanfei
2012-10-31 0:18 ` Marcelo Tosatti
2012-10-31 1:52 ` zhangyanfei
2012-10-19 5:46 ` [PATCH 2/2] KVM: make crash_clear_loaded_vmcss valid when loading kvm_intel module Zhang Yanfei
2012-10-25 10:47 ` zhangyanfei [this message]
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