From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
To: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
LKML <linux-kernel@vger.kernel.org>, KVM <kvm@vger.kernel.org>
Subject: [PATCH 0/4] KVM: MMU: mmu audit code improved
Date: Sat, 28 Aug 2010 19:58:56 +0800 [thread overview]
Message-ID: <4C78FA00.8090606@cn.fujitsu.com> (raw)
The audit can help us to detect the mmu bugs as early as possible, it's also
can help us to fix them.
It's so useful but the linux distribution is imposable to use it since:
- it need enable it by define "AUDIT" macro and compile it
- the audit code is very high overload, it lets the guest mostly hung
So, this patchset supports to enable/disable it dynamically, it's very low
overhead if disable it, and it lowers the audit frequency to assure the guest
running.
After this patchset, we can enable it by:
mount -t debugfs none debugfs
echo 1 > debugfs/kvm/mmu-debug
disable it by:
echo 0 > debugfs/kvm/mmu-debug
default, the audit is disabled
[PATCH 1/4] KVM: MMU: support disable/enable mmu audit dynamically
[PATCH 2/4] KVM: MMU: improve active sp audit
[PATCH 3/4] KVM: MMU: improve spte audit
[PATCH 4/4] KVM: MMU: lower the aduit frequency
next reply other threads:[~2010-08-28 11:58 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-28 11:58 Xiao Guangrong [this message]
2010-08-28 12:00 ` [PATCH 1/4] KVM: MMU: support disable/enable mmu audit dynamicly Xiao Guangrong
2010-08-29 9:16 ` Avi Kivity
2010-08-30 1:58 ` Xiao Guangrong
2010-08-28 12:01 ` [PATCH 2/4] KVM: MMU: improve active sp audit Xiao Guangrong
2010-08-28 12:02 ` [PATCH 3/4] KVM: MMU: improve spte audit Xiao Guangrong
2010-08-28 12:03 ` [PATCH 4/4] KVM: MMU: lower the aduit frequency Xiao Guangrong
2010-08-29 9:19 ` Avi Kivity
2010-08-30 2:16 ` Xiao Guangrong
2010-08-30 6:59 ` Avi Kivity
2010-08-30 10:22 ` [PATCH v2 1/5] KVM: MMU: support disable/enable mmu audit dynamicly Xiao Guangrong
2010-08-30 10:24 ` [PATCH v2 2/5] KVM: MMU: move audit to a separate file Xiao Guangrong
2010-08-30 10:25 ` [PATCH v2 3/5] KVM: MMU: improve active sp audit Xiao Guangrong
2010-08-30 10:25 ` [PATCH v2 4/5] KVM: MMU: improve spte audit Xiao Guangrong
2010-08-30 10:26 ` [PATCH v2 5/5] KVM: MMU: lower the aduit frequency Xiao Guangrong
2010-08-30 15:47 ` Marcelo Tosatti
2010-08-31 2:27 ` Xiao Guangrong
2010-09-01 9:06 ` Avi Kivity
2010-09-01 16:27 ` Marcelo Tosatti
2010-09-02 8:30 ` Avi Kivity
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