From: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
To: Avi Kivity <avi@redhat.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>,
Marcelo Tosatti <mtosatti@redhat.com>, KVM <kvm@vger.kernel.org>,
quintela@redhat.com, qemu-devel@nongnu.org,
Takuya Yoshikawa <takuya.yoshikawa@gmail.com>
Subject: Re: [PATCH 0/4] KVM: Dirty logging optimization using rmap
Date: Wed, 30 Nov 2011 14:15:47 +0900 [thread overview]
Message-ID: <4ED5BC03.5000901@oss.ntt.co.jp> (raw)
In-Reply-To: <4ED5B8F2.2090804@oss.ntt.co.jp>
(2011/11/30 14:02), Takuya Yoshikawa wrote:
> IIUC, even though O(1) is O(1) at the timing of GET DIRTY LOG, it needs O(N) write
> protections with respect to the total number of dirty pages: distributed, but
> actually each page fault, which should be logged, does some write protection?
Sorry, was not precise. It depends on the level, and not completely distributed.
But I think it is O(N), and the total number of costs will not change so much,
I guess.
Takuya
>
> In general, what kind of improvements actually needed for live migration?
>
> Thanks,
> Takuya
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
WARNING: multiple messages have this Message-ID (diff)
From: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
To: Avi Kivity <avi@redhat.com>
Cc: KVM <kvm@vger.kernel.org>,
quintela@redhat.com, Marcelo Tosatti <mtosatti@redhat.com>,
qemu-devel@nongnu.org,
Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>,
Takuya Yoshikawa <takuya.yoshikawa@gmail.com>
Subject: Re: [Qemu-devel] [PATCH 0/4] KVM: Dirty logging optimization using rmap
Date: Wed, 30 Nov 2011 14:15:47 +0900 [thread overview]
Message-ID: <4ED5BC03.5000901@oss.ntt.co.jp> (raw)
In-Reply-To: <4ED5B8F2.2090804@oss.ntt.co.jp>
(2011/11/30 14:02), Takuya Yoshikawa wrote:
> IIUC, even though O(1) is O(1) at the timing of GET DIRTY LOG, it needs O(N) write
> protections with respect to the total number of dirty pages: distributed, but
> actually each page fault, which should be logged, does some write protection?
Sorry, was not precise. It depends on the level, and not completely distributed.
But I think it is O(N), and the total number of costs will not change so much,
I guess.
Takuya
>
> In general, what kind of improvements actually needed for live migration?
>
> Thanks,
> Takuya
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2011-11-30 5:15 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-14 9:20 [PATCH 0/4] KVM: Dirty logging optimization using rmap Takuya Yoshikawa
2011-11-14 9:21 ` [PATCH 1/4] KVM: MMU: Clean up BUG_ON() conditions in rmap_write_protect() Takuya Yoshikawa
2011-11-14 9:22 ` [PATCH 2/4] KVM: MMU: Split gfn_to_rmap() into two functions Takuya Yoshikawa
2011-11-14 9:23 ` [PATCH 3/4] KVM: Count the number of dirty pages for dirty logging Takuya Yoshikawa
2011-11-14 10:07 ` Avi Kivity
2011-11-14 10:24 ` Avi Kivity
2011-12-20 4:29 ` Takuya Yoshikawa
2011-12-23 11:14 ` Marcelo Tosatti
2011-12-24 2:52 ` Takuya Yoshikawa
2011-12-27 13:50 ` Marcelo Tosatti
2011-12-27 14:03 ` Avi Kivity
2011-12-27 15:03 ` Takuya Yoshikawa
2011-12-27 15:06 ` Avi Kivity
2011-12-27 15:15 ` Takuya Yoshikawa
2011-12-27 15:18 ` Avi Kivity
2011-11-14 9:24 ` [PATCH 4/4] KVM: Optimize dirty logging by rmap_write_protect() Takuya Yoshikawa
2011-11-14 10:22 ` Avi Kivity
2011-11-14 10:29 ` Takuya Yoshikawa
2011-11-14 10:25 ` [PATCH 0/4] KVM: Dirty logging optimization using rmap Avi Kivity
2011-11-14 10:56 ` Takuya Yoshikawa
2011-11-14 12:39 ` Avi Kivity
2011-11-16 4:28 ` Takuya Yoshikawa
2011-11-16 9:06 ` Avi Kivity
2011-11-29 10:01 ` Xiao Guangrong
2011-11-29 10:09 ` Xiao Guangrong
2011-11-29 10:35 ` Takuya Yoshikawa
2011-11-29 11:20 ` Avi Kivity
2011-11-29 11:56 ` Xiao Guangrong
2011-11-29 12:01 ` Avi Kivity
2011-11-29 14:03 ` Avi Kivity
2011-11-30 5:02 ` Takuya Yoshikawa
2011-11-30 5:02 ` [Qemu-devel] " Takuya Yoshikawa
2011-11-30 5:15 ` Takuya Yoshikawa [this message]
2011-11-30 5:15 ` Takuya Yoshikawa
2011-12-01 15:18 ` Avi Kivity
2011-12-01 15:18 ` [Qemu-devel] " Avi Kivity
2011-12-03 4:37 ` Takuya Yoshikawa
2011-12-03 4:37 ` [Qemu-devel] " Takuya Yoshikawa
2011-12-04 10:20 ` Avi Kivity
2011-12-04 10:20 ` [Qemu-devel] " Avi Kivity
2011-11-30 7:10 ` Xiao Guangrong
2011-11-30 7:03 ` Xiao Guangrong
2011-12-01 15:11 ` Avi Kivity
2011-11-16 8:17 ` Takuya Yoshikawa
2011-11-16 8:17 ` [Qemu-devel] " Takuya Yoshikawa
2011-11-17 9:28 ` Avi Kivity
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