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Date: Tue, 07 Aug 2012 09:32:47 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: zhenzhong.duan@oracle.com
CC: tglx@linutronix.de, mingo@redhat.com, x86@kernel.org,
        linux-kernel@vger.kernel.org,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        Feng Jin <joe.jin@oracle.com>
Subject: Re: [PATCH] Parallelize mtrr init between cpus
References: <5020C3D7.2070407@oracle.com>
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On 08/07/2012 12:29 AM, zhenzhong.duan wrote:
> Current code serialize mtrr init with set_atomicity_lock.
> Mtrr init is quite slow when we bootup on a hvm with large mem, vcpus
> and pci passthroughed devices(eg. 24 vcpus + 90G mem).
> It took about ~30 mins to bootup, after patch, it took ~2 min.

When you're saying "HVM" do you mean "Xen HVM"?  How does it behave on
native hardware?

	-hpa