Re: [Xen-devel] [Qemu-devel] [PULL 3/3] xen-disk: add support for multi-page shared rings

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Thu, 27 Jul 2017, Olaf Hering wrote:
> On Tue, Jun 27, Stefano Stabellini wrote:
> 
> > From: Paul Durrant <paul.durrant@xxxxxxxxxx>
> > The blkif protocol has had provision for negotiation of multi-page shared
> > rings for some time now and many guest OS have support in their frontend
> > drivers.
> 
> > +++ b/hw/block/xen_disk.c
> 
> > +    domids = g_malloc0_n(blkdev->nr_ring_ref, sizeof(uint32_t));
> 
> According to [1] g_malloc0_n requires at least glib-2.24. As a result
> compilation of qemu-2.10 fails in SLE11, which has just glib-2.22.
> 
> Olaf
> 
> [1] https://developer.gnome.org/glib/stable/glib-Memory-Allocation.html

It looks like QEMU supports glib 2.22, so this ought to work. In fact
the only user of g_malloc0_n is xen_disk.c. I would be happy to take a
patch that replaces g_malloc0_n with g_malloc0.

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