From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Ahern <dsahern@gmail.com>
Subject: Re: Tracing kvm: kvm_entry and kvm_exit
Date: Sun, 03 Mar 2013 22:40:20 -0700
Message-ID: <513433C4.7040104@gmail.com>
References: <1361550867.51279e13338a7@www.imp.polymtl.ca> <20130225101804.GC2790@stefanha-thinkpad.redhat.com> <512E36B2.5090100@gmail.com> <512EE1D4.6080808@gmail.com> <1362375371.513432cbdb150@www.imp.polymtl.ca>
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To: Mohamad Gebai <mohamad.gebai@polymtl.ca>
Cc: Stefan Hajnoczi <stefanha@gmail.com>, kvm@vger.kernel.org, linux-perf-users@vger.kernel.org

On 3/3/13 10:36 PM, Mohamad Gebai wrote:
> Thank you for this, I have been testing it for the last couple of days, I can
> see that perf kvm is getting more stable. Though I just realized that if you
> launch perf kvm as soon as you start a VM, the VM fails to boot. Any idea why
> this happens?
>

no, but tell me more and I'll see if I can reproduce.

host kernel version?
guest kernel?
qemu-kvm command line? (leave out the disk and network arguments -- just 
the rest)

sequence of events? launching qemu-kvm in one window and at the "same 
time" launching perf-kvm? Or is perf-kvm started a few seconds prior to 
qemu-kvm or vice-versa?