Re: [Xen-devel] [PATCH for v1.6] pc: Fix initialization of the ram_memory variable.

[Fabio Fantoni <fabio.fantoni@xxxxxxx>]

Il 26/08/2013 17:00, Fabio Fantoni ha scritto:
> Il 16/08/2013 16:46, Anthony PERARD ha scritto:
> > In some cases (Xen), it will not be initialized before to be used. This
> > leads to segv.
> >
> > Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
> Tested-by: Fabio Fantoni <fabio.fantoni@xxxxxxx>
> This patch have solved the critical regression of all hvm domUs that 
> prevented domUs starting with qemu 1.6.
I not see this patch on git for now, I think is urgent apply this patch 
or solve the problem in other way because qemu 1.6 is unusable at all 
for hvm domUs on xen and 1.5.x doesn't works with hvm domUs with ram > 
2gb, with qemu 1.6 the regression of > 2 gb ram is solved but without 
this patch doesn't works at all.
Thanks for any reply and sorry for my bad english.

> > ---
> >
> > It works with this simple initialization to NULL, but would it be
> > necessary (or better) to assign a proper value to this variables ?
> > ---
> >   hw/i386/pc_piix.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> > index 6e1e654..596d433 100644
> > --- a/hw/i386/pc_piix.c
> > +++ b/hw/i386/pc_piix.c
> > @@ -86,7 +86,7 @@ static void pc_init1(MemoryRegion *system_memory,
> >       BusState *idebus[MAX_IDE_BUS];
> >       ISADevice *rtc_state;
> >       ISADevice *floppy;
> > -    MemoryRegion *ram_memory;
> > +    MemoryRegion *ram_memory = NULL;
> >       MemoryRegion *pci_memory;
> >       MemoryRegion *rom_memory;
> >       DeviceState *icc_bridge;

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