From: Avi Kivity <avi@redhat.com>
To: Takuya Yoshikawa <takuya.yoshikawa@gmail.com>
Cc: mtosatti@redhat.com, kvm@vger.kernel.org,
yoshikawa.takuya@oss.ntt.co.jp, xiaoguangrong@cn.fujitsu.com,
Joerg.Roedel@amd.com
Subject: Re: [PATCH 1/1 v2] KVM: MMU: Optimize guest page table walk
Date: Sun, 24 Apr 2011 10:27:06 +0300 [thread overview]
Message-ID: <4DB3D0CA.6050007@redhat.com> (raw)
In-Reply-To: <20110422003444.5b3a876a.takuya.yoshikawa@gmail.com>
On 04/21/2011 06:34 PM, Takuya Yoshikawa wrote:
> From: Takuya Yoshikawa<yoshikawa.takuya@oss.ntt.co.jp>
>
> This patch optimizes the guest page table walk by using get_user()
> instead of copy_from_user().
>
> With this patch applied, paging64_walk_addr_generic() has become
> about 0.5us to 1.0us faster on my Phenom II machine with NPT on.
Applied, thanks. Care to send a follow-on patch that makes
cmpxchg_gpte() use ptep_user instead of calculating it by itself?
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2011-04-24 7:27 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-21 15:32 [PATCH 0/1 v2] KVM: MMU: Optimize guest page table walk Takuya Yoshikawa
2011-04-21 15:34 ` [PATCH 1/1 " Takuya Yoshikawa
2011-04-24 7:27 ` Avi Kivity [this message]
2011-04-24 13:15 ` Takuya Yoshikawa
2011-04-25 8:04 ` Jan Kiszka
2011-04-25 8:32 ` Takuya Yoshikawa
2011-04-25 9:15 ` Jan Kiszka
2011-04-26 4:50 ` Takuya Yoshikawa
2011-04-26 6:34 ` Jan Kiszka
2011-04-26 14:40 ` Takuya Yoshikawa
2011-04-26 14:54 ` Avi Kivity
2011-04-26 15:13 ` Takuya Yoshikawa
2011-04-26 17:15 ` Avi Kivity
2011-04-26 16:26 ` Takuya Yoshikawa
2011-04-26 17:16 ` Avi Kivity
2011-04-26 7:42 ` Avi Kivity
2011-04-26 7:45 ` Jan Kiszka
2011-04-26 8:21 ` Avi Kivity
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