From: Keir Fraser <keir.fraser@eu.citrix.com>
To: Tim Deegan <Tim.Deegan@eu.citrix.com>
Cc: "Zhang, Yang Z" <yang.z.zhang@intel.com>,
"Zhang, Jianwu" <jianwu.zhang@intel.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"Xu, Jiajun" <jiajun.xu@intel.com>
Subject: Re: Re: [PATCH] Re: cs:21768 causes guest spend more time on boot up
Date: Mon, 19 Jul 2010 13:30:15 +0100 [thread overview]
Message-ID: <C86A03E7.1AFA1%keir.fraser@eu.citrix.com> (raw)
In-Reply-To: <C86A028E.1AF9E%keir.fraser@eu.citrix.com>
On 19/07/2010 13:24, "Keir Fraser" <keir.fraser@eu.citrix.com> wrote:
>> Ah, so it does. I assumed it was the kernel because that's all that
>> changed on my test box since I last tested this stuff. I'm using the C
>> xenstored and its code looks like it should work fine with the page
>> getting zeroed under its feet. I'll dig further.
>
> Thanks. The revised patch might be acceptable, but if possible we're better
> off relying on undocumented xenstored behaviour than domU frontend behaviour
> since the former we have full control over (albeit we now have two daemons
> to consider). Really nice would be some kind of explicit reset command or
> protocol, but in this context since there are no watches or pending requests
> or anything, I guess whacking the xenstore page is sufficient engineering
> effort.
And, yes, I agree it looks like the existing code should just work. The C
xenstored, at least, doesn't cache ring indexes.
-- Keir
next prev parent reply other threads:[~2010-07-19 12:30 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-15 8:07 cs:21768 causes guest spend more time on boot up Zhang, Yang Z
2010-07-15 9:48 ` Tim Deegan
2010-07-15 12:22 ` Tim Deegan
2010-07-15 15:14 ` Zhang, Yang Z
2010-07-15 15:20 ` Tim Deegan
2010-07-15 15:30 ` Zhang, Yang Z
2010-07-15 15:33 ` Tim Deegan
2010-07-19 10:55 ` [PATCH] " Tim Deegan
2010-07-19 11:46 ` Keir Fraser
2010-07-19 12:19 ` Tim Deegan
2010-07-19 12:24 ` Keir Fraser
2010-07-19 12:30 ` Keir Fraser [this message]
2010-07-20 10:38 ` [PATCH] v2 (Re: cs:21768 causes guest spend more time on boot up) Tim Deegan
2010-07-20 11:16 ` Keir Fraser
2010-07-22 9:01 ` Zhang, Jianwu
2010-07-22 13:20 ` Keir Fraser
2010-07-22 13:41 ` Tim Deegan
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