From: Olaf Hering <olaf@aepfle.de>
To: Tim Deegan <tim@xen.org>
Cc: xen-devel@lists.xen.org
Subject: Re: [PATCH] hvm: handle PoD and grant pages in HVMOP_get_mem_type
Date: Mon, 22 Oct 2012 17:33:33 +0200 [thread overview]
Message-ID: <20121022153333.GA27414@aepfle.de> (raw)
In-Reply-To: <20121022152256.GH12577@ocelot.phlegethon.org>
On Mon, Oct 22, Tim Deegan wrote:
> At 16:09 +0200 on 19 Oct (1350662980), Olaf Hering wrote:
> > hvm: handle PoD and grant pages in HVMOP_get_mem_type
> >
> > During kexec in a ballooned PVonHVM guest the new kernel needs to check
> > each pfn if its backed by a mfn to find ballooned pages. Currently all
> > PoD and grant pages will appear as HVMMEM_mmio_dm, so the new kernel has
> > to assume they are ballooned. This is wrong: PoD pages may turn into
> > real RAM at runtime, grant pages are also RAM.
> >
> > Signed-off-by: Olaf Hering <olaf@aepfle.de>
>
> Applied, thanks.
Would you backport this to 4.2 and 4.1?
Without this change the guest will get a wrong picture.
Too bad I did not consider this initially in 23298:26413986e6e0.
Olaf
next prev parent reply other threads:[~2012-10-22 15:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-19 14:09 [PATCH] hvm: handle PoD and grant pages in HVMOP_get_mem_type Olaf Hering
2012-10-19 14:14 ` Olaf Hering
2012-10-22 15:22 ` Tim Deegan
2012-10-22 15:33 ` Olaf Hering [this message]
2012-10-22 16:13 ` Tim Deegan
2012-10-23 7:16 ` Jan Beulich
[not found] <mailman.15017.1350657933.1399.xen-devel@lists.xen.org>
2012-10-19 15:45 ` Andres Lagar-Cavilla
2012-10-22 14:48 ` Olaf Hering
2012-10-22 14:59 ` Olaf Hering
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