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Date: Wed, 08 Aug 2012 10:08:49 +0800
From: "zhenzhong.duan" <zhenzhong.duan@oracle.com>
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To: "H. Peter Anvin" <hpa@zytor.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> <5021432F.2030907@zytor.com>
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  2012-08-08 00:32, H. Peter Anvin wrote:
> 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
Yes, I mean Xen HVM. Bootup at same speed as before on baremetal.