From: Wei Liu <wei.liu2@citrix.com>
To: George Dunlap <george.dunlap@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>,
Ian Campbell <ian.campbell@citrix.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
Don Slutz <dslutz@verizon.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Subject: Re: QEMU bumping memory bug analysis
Date: Tue, 9 Jun 2015 11:17:03 +0100 [thread overview]
Message-ID: <20150609101703.GM29102@zion.uk.xensource.com> (raw)
In-Reply-To: <5576B92C.9090300@eu.citrix.com>
On Tue, Jun 09, 2015 at 11:00:12AM +0100, George Dunlap wrote:
> >> I think that qemu needs to tell libxl how much memory it is using for
> >> all of its needs -- including option ROMs. (See my example below.) For
> >> older qemus we can just make some assumptions like we always have.
> >>
> >
> > I am happy with this. Note: I think libxl could determine this number
> > now without QEMU changes. However it does depend on no other thread
> > changing a "staring" domain's memory while libxl is calculating this.
> >
> >> I do think it would make sense to have the hvmloader amount listed
> >> somewhere explicitly. I'm not sure how often hvmloader may need to
> >> change the amount it uses for itself.
> >>
> >
> > hvmloader does yet a different method. If
> > xc_domain_populate_physmap_exact() fails, it reduces guest RAM (if my
> > memory is correct).
>
> This makes me wonder if we could make qemu do the same thing.
>
I don't think so, because QEMU can't adjust hvm_info.
> -George
next prev parent reply other threads:[~2015-06-09 10:17 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-05 16:43 QEMU bumping memory bug analysis Wei Liu
2015-06-05 16:58 ` Ian Campbell
2015-06-05 17:13 ` Stefano Stabellini
2015-06-05 19:06 ` Wei Liu
2015-06-05 17:17 ` Andrew Cooper
2015-06-05 17:39 ` Wei Liu
2015-06-05 17:10 ` Stefano Stabellini
2015-06-05 18:10 ` Wei Liu
2015-06-08 11:39 ` Stefano Stabellini
2015-06-08 12:14 ` Andrew Cooper
2015-06-08 13:01 ` Stefano Stabellini
2015-06-08 13:33 ` Jan Beulich
2015-06-08 13:10 ` Wei Liu
2015-06-08 13:27 ` Stefano Stabellini
2015-06-08 13:32 ` Wei Liu
2015-06-08 13:38 ` Stefano Stabellini
2015-06-08 13:44 ` Andrew Cooper
2015-06-08 13:45 ` Stefano Stabellini
2015-06-05 18:49 ` Ian Campbell
2015-06-08 11:40 ` Stefano Stabellini
2015-06-08 12:11 ` Ian Campbell
2015-06-08 13:22 ` Stefano Stabellini
2015-06-08 13:52 ` Ian Campbell
2015-06-08 14:20 ` George Dunlap
2015-06-08 15:01 ` Don Slutz
2015-06-08 15:37 ` George Dunlap
2015-06-08 16:06 ` Don Slutz
2015-06-09 10:00 ` George Dunlap
2015-06-09 10:17 ` Wei Liu [this message]
2015-06-09 10:14 ` Stefano Stabellini
2015-06-09 11:20 ` George Dunlap
2015-06-16 16:44 ` Stefano Stabellini
2015-06-09 12:45 ` Ian Campbell
2015-06-17 13:35 ` Stefano Stabellini
2015-06-08 14:53 ` Konrad Rzeszutek Wilk
2015-06-08 15:20 ` George Dunlap
2015-06-08 15:42 ` Konrad Rzeszutek Wilk
2015-06-08 14:14 ` George Dunlap
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