Re: [Qemu-devel] [PATCH 1/1] s390x/sclp: fix maxram calculation

[Michael Roth <mdroth@linux.vnet.ibm.com>]

Quoting Christian Borntraeger (2018-07-30 10:31:12)
> Are we still able to get things into 2.12.1 or are we too late?

Freeze is EOD today, but I can grab them if they hit master/rc3 tomorrow.

> 
> 
> On 07/30/2018 04:09 PM, Christian Borntraeger wrote:
> > We clamp down ram_size to match the sclp increment size. We do
> > not do the same for maxram_size, which means for large guests
> > with some sizes (e.g. -m 50000) maxram_size differs from ram_size.
> > This can break other code (e.g. CMMA migration) which uses maxram_size
> > to calculate the number of pages and then throws some errors.
> > 
> > Fixes: 82fab5c5b90e468f3e9d54c ("s390x/sclp: remove memory hotplug support")
> > Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
> > CC: qemu-stable@nongnu.org
> > CC: David Hildenbrand <david@redhat.com>
> > ---
> >  hw/s390x/sclp.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
> > index bd2a024..4510a80 100644
> > --- a/hw/s390x/sclp.c
> > +++ b/hw/s390x/sclp.c
> > @@ -320,6 +320,7 @@ static void sclp_memory_init(SCLPDevice *sclp)
> >      initial_mem = initial_mem >> increment_size << increment_size;
> >  
> >      machine->ram_size = initial_mem;
> > +    machine->maxram_size = initial_mem;
> >      /* let's propagate the changed ram size into the global variable. */
> >      ram_size = initial_mem;
> >  }
> > 
>