On Thu, Dec 01, 2016 at 06:06:19PM +0100, Laszlo Ersek wrote:
> We'd like to raise the value of FW_CFG_FILE_SLOTS. Doing it naively could
> lead to problems with backward migration: a more recent QEMU (running an
> older machine type) would allow the guest, in fw_cfg_select(), to select a
> high ke
On 12/06/16 13:02, Igor Mammedov wrote:
> On Tue, 6 Dec 2016 12:43:06 +0100
> Laszlo Ersek wrote:
>
>> On 12/06/16 11:50, Igor Mammedov wrote:
>>> On Thu, 1 Dec 2016 18:06:19 +0100
>>> Laszlo Ersek wrote:
>>>
We'd like to raise the value of FW_CFG_FILE_SLOTS. Doing it naively could
On Tue, 6 Dec 2016 12:43:06 +0100
Laszlo Ersek wrote:
> On 12/06/16 11:50, Igor Mammedov wrote:
> > On Thu, 1 Dec 2016 18:06:19 +0100
> > Laszlo Ersek wrote:
> >
> >> We'd like to raise the value of FW_CFG_FILE_SLOTS. Doing it naively could
> >> lead to problems with backward migration: a mo
On 12/06/16 11:50, Igor Mammedov wrote:
> On Thu, 1 Dec 2016 18:06:19 +0100
> Laszlo Ersek wrote:
>
>> We'd like to raise the value of FW_CFG_FILE_SLOTS. Doing it naively could
>> lead to problems with backward migration: a more recent QEMU (running an
>> older machine type) would allow the gues
On Thu, 1 Dec 2016 18:06:19 +0100
Laszlo Ersek wrote:
> We'd like to raise the value of FW_CFG_FILE_SLOTS. Doing it naively could
> lead to problems with backward migration: a more recent QEMU (running an
> older machine type) would allow the guest, in fw_cfg_select(), to select a
> high key val
Hi,
> Please check one of the links in the blurb, under which Paolo noted that
> we're already above the limit in the worst (theoretical) case.
Oh, ok. That changes the picture.
> In practice they don't hit the limit, indeed.
But creating such a case being possible (even if unlikely) is reas
On 12/02/16 12:10, Gerd Hoffmann wrote:
> On Do, 2016-12-01 at 18:06 +0100, Laszlo Ersek wrote:
>> We'd like to raise the value of FW_CFG_FILE_SLOTS. Doing it naively could
>> lead to problems with backward migration: a more recent QEMU (running an
>> older machine type) would allow the guest, in f
On Do, 2016-12-01 at 18:06 +0100, Laszlo Ersek wrote:
> We'd like to raise the value of FW_CFG_FILE_SLOTS. Doing it naively could
> lead to problems with backward migration: a more recent QEMU (running an
> older machine type) would allow the guest, in fw_cfg_select(), to select a
> high key value
We'd like to raise the value of FW_CFG_FILE_SLOTS. Doing it naively could
lead to problems with backward migration: a more recent QEMU (running an
older machine type) would allow the guest, in fw_cfg_select(), to select a
high key value that is unavailable in the same machine type implemented by
th