From: oerg Roedel <joro@8bytes.org>
To: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Cc: Avi Kivity <avi@redhat.com>, Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Sheng Yang <sheng@linux.intel.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
Marcelo Tosatti <mtosatti@redhat.com>,
Jes Sorensen <Jes.Sorensen@redhat.com>,
Gleb Natapov <gleb@redhat.com>,
Zachary Amsden <zamsden@redhat.com>,
zhiteng.huang@intel.com, tim.c.chen@intel.com,
Arnaldo Carvalho de Melo <acme@infradead.org>
Subject: Re: [PATCH V3] perf & kvm: Enhance perf to collect KVM guest os statistics from host side
Date: Thu, 15 Apr 2010 11:04:03 +0200 [thread overview]
Message-ID: <20100415090403.GA12697@8bytes.org> (raw)
In-Reply-To: <1902473858.2078.481.camel@ymzhang.sh.intel.com>
On Mon, Apr 15, 2030 at 04:57:38PM +0800, Zhang, Yanmin wrote:
> I checked svm.c and it seems svm.c doesn't trigger a NMI to host if the NMI
> happens in guest os. In addition, svm_complete_interrupts is called after
> interrupt is enabled.
Yes. The NMI is held pending by the hardware until the STGI instruction
is executed.
And for nested svm the svm_complete_interrupts function needs to be
executed after the nested exit handling. Therefore it is done late on
svm.
Joerg
next prev parent reply other threads:[~2010-04-15 9:04 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2030-04-14 9:05 [PATCH V3] perf & kvm: Enhance perf to collect KVM guest os statistics from host side Zhang, Yanmin
2010-04-14 9:20 ` Avi Kivity
2010-04-14 9:43 ` Sheng Yang
2010-04-14 9:57 ` Avi Kivity
2010-04-14 10:14 ` Sheng Yang
2010-04-14 10:19 ` Avi Kivity
2010-04-14 10:27 ` Sheng Yang
2010-04-14 10:33 ` Avi Kivity
2010-04-14 10:36 ` Sheng Yang
2010-04-14 10:43 ` Ingo Molnar
2010-04-14 11:17 ` Avi Kivity
2030-04-15 1:04 ` Zhang, Yanmin
2010-04-15 8:05 ` Avi Kivity
2030-04-15 8:57 ` Zhang, Yanmin
2010-04-15 9:04 ` oerg Roedel [this message]
2010-04-15 9:09 ` Avi Kivity
2010-04-15 9:44 ` oerg Roedel
2010-04-15 9:48 ` Avi Kivity
2010-04-15 10:40 ` Joerg Roedel
2010-04-15 10:44 ` Avi Kivity
2010-04-15 14:08 ` Sheng Yang
2010-04-17 18:12 ` Avi Kivity
2010-04-19 8:25 ` Avi Kivity
2010-04-20 3:32 ` Sheng Yang
2010-04-20 9:38 ` Avi Kivity
2010-04-27 19:03 ` [PATCH] Psychovisually-optimized HZ setting (2.6.33.3) Uwaysi Bin Kareem
2010-04-27 19:51 ` Randy Dunlap
2010-04-27 21:50 ` Valdis.Kletnieks
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