From: Takuya Yoshikawa <takuya.yoshikawa@gmail.com>
To: Avi Kivity <avi@redhat.com>
Cc: mtosatti@redhat.com, kvm@vger.kernel.org
Subject: Re: [RFC] need to improve slot creation/destruction? -- Re: [RFC][PATCH] srcu: Implement call_srcu()
Date: Fri, 10 Feb 2012 22:08:12 +0900 [thread overview]
Message-ID: <20120210220812.4e2e3a30c7fddf72d4e6e8af@gmail.com> (raw)
In-Reply-To: <4F33D711.6020104@redhat.com>
Avi Kivity <avi@redhat.com> wrote:
> On 02/09/2012 04:23 PM, Avi Kivity wrote:
> > > BTW do we really need fast slot creation/destruction?
> >
> > Not really, but it's good to have infrastructure that copes with
> > different workloads. If the patches keep the code simple I think it's a
> > good thing to have.
My patch is pretty simple.
> To qualify - taking several tens of milliseconds is out of the question
> as some workloads grind to a halt. But it doesn't need to be incredibly
> fast.
I think the problem is not how long it takes to create/invalidate a slot
but following faults and shadow pages reconstruction.
Similar to mmu shrinker problem we discussed before.
E.g. users will not expect sudden latency induced by pci hotplug.
Takuya
next prev parent reply other threads:[~2012-02-10 13:08 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
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 [this message]
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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