From: Takuya Yoshikawa <takuya.yoshikawa@gmail.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: avi@redhat.com, kvm@vger.kernel.org
Subject: Re: [RFC] need to improve slot creation/destruction? -- Re: [RFC][PATCH] srcu: Implement call_srcu()
Date: Thu, 9 Feb 2012 22:48:39 +0900 [thread overview]
Message-ID: <20120209224839.a42593552852b65f19c969ba@gmail.com> (raw)
In-Reply-To: <20120208184531.GA19883@amt.cnet>
On Wed, 8 Feb 2012 16:45:31 -0200
Marcelo Tosatti <mtosatti@redhat.com> wrote:
> > For 3: I think doing both "write protection" and "shadow flush" is unnecessary.
>
> If you enable dirty logging on a slot, certainly you have to write
> protect?
When we enable dirty logging, yes.
>
> > BTW do we really need fast slot creation/destruction?
>
> At the moment yes. Boot a RHEL/Fedora installation disk (or any other
> guest which uses SYSLINUX splash screen) and you will see. That
> particular case is a limitation of cirrus in QEMU, ideally it should be
> optimized there.
>
I've checked; limiting flush to that slot seems to be good.
I will send a patch soon.
Takuya
next prev parent reply other threads:[~2012-02-09 13:48 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1328016724.2446.229.camel@twins>
2012-01-31 13:47 ` [RFC][PATCH] srcu: Implement call_srcu() Avi Kivity
2012-01-31 13:50 ` Peter Zijlstra
2012-01-31 22:24 ` Paul E. McKenney
2012-02-01 10:22 ` Peter Zijlstra
2012-02-01 10:44 ` Avi Kivity
2012-02-01 10:49 ` Avi Kivity
2012-02-01 11:00 ` Takuya Yoshikawa
2012-02-01 11:01 ` Avi Kivity
2012-02-01 11:12 ` Takuya Yoshikawa
2012-02-01 13:24 ` Avi Kivity
2012-02-02 5:46 ` [test result] dirty logging without srcu update -- " Takuya Yoshikawa
2012-02-02 10:10 ` Avi Kivity
2012-02-02 10:21 ` Takuya Yoshikawa
2012-02-02 10:21 ` Avi Kivity
2012-02-02 10:40 ` Takuya Yoshikawa
2012-02-02 11:02 ` Avi Kivity
2012-02-02 14:44 ` Takuya Yoshikawa
2012-02-02 14:57 ` Avi Kivity
2012-02-01 13:43 ` Marcelo Tosatti
2012-02-01 15:42 ` Takuya Yoshikawa
2012-02-01 13:50 ` Marcelo Tosatti
2012-02-08 15:43 ` [RFC] need to improve slot creation/destruction? -- " Takuya Yoshikawa
2012-02-08 18:45 ` Marcelo Tosatti
2012-02-09 13:48 ` Takuya Yoshikawa [this message]
2012-02-09 14:25 ` Avi Kivity
2012-02-10 17:16 ` Marcelo Tosatti
2012-02-14 9:52 ` Avi Kivity
2012-02-09 14:23 ` Avi Kivity
2012-02-09 14:24 ` Avi Kivity
2012-02-10 13:08 ` Takuya Yoshikawa
2012-02-10 17:17 ` Marcelo Tosatti
2012-02-10 13:25 ` Takuya Yoshikawa
2012-02-14 9:52 ` Avi Kivity
2012-02-01 14:07 ` Paul E. McKenney
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