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Date: Sat, 17 Apr 2010 21:34:38 +0200 From: Ingo Molnar <mingo@...e.hu> To: Avi Kivity <avi@...hat.com> Cc: "Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Sheng Yang <sheng@...ux.intel.com>, Marcelo Tosatti <mtosatti@...hat.com>, oerg Roedel <joro@...tes.org>, kvm@...r.kernel.org, Jes Sorensen <Jes.Sorensen@...hat.com>, linux-kernel@...r.kernel.org, Zachary Amsden <zamsden@...hat.com>, Gleb Natapov <gleb@...hat.com>, tim.c.chen@...el.com, zhiteng.huang@...el.com, Arnaldo Carvalho de Melo <acme@...radead.org> Subject: Re: [PATCH V4 1/2] perf & kvm: Enhance perf to collect KVM guest os statistics from host side * Avi Kivity <avi@...hat.com> wrote: > On 04/17/2010 10:13 PM, Ingo Molnar wrote: > >* Avi Kivity<avi@...hat.com> wrote: > > > >>On 04/16/2010 10:34 AM, Zhang, Yanmin wrote: > >>>Below is the kernel patch to enable perf to collect guest os statistics. > >>> > >>>Joerg, > >>> > >>>Would you like to add support on svm? I don't know the exact point to trigger > >>>NMI to host with svm. > >>> > >>>See below code with vmx: > >>> > >>>+ kvm_before_handle_nmi(&vmx->vcpu); > >>> asm("int $2"); > >>>+ kvm_after_handle_nmi(&vmx->vcpu); > >>> > >>>Signed-off-by: Zhang Yanmin<yanmin_zhang@...ux.intel.com> > >>Can you please split it further? > >> > >>Patch 1 introduces perf_register_guest_info_callbacks() and related. Ingo > >>can merge this into a branch in tip.git. Patch 2 is just the kvm bits, I'll > >>apply that after merging the branch with patch 1. Patch 3 adds the > >>tools/perf changes. > >> > >>This way perf development can continue on tip.git, and kvm development can > >>continue on kvm.git, without the code bases diverging and requiring a merge > >>later. > >I'd like to pull the KVM bits from you into perf - so that there's a testable > >form of the changes. We can do that via a branch that has 1-2 changes, plus > >minimal conflicts down the line, right? > > We can try doing this (currently we don't, but this is simple enough that we > could). Thanks. > [...] I'd still like 1-2 in two patches. Sure. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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