On 5/28/19 3:48 PM, Gerd Hoffmann wrote: > Original q35 behavior was to split memory 2.75 GB, leaving space for the
s/memory/memory at/ > mmconfig bar at 0xb000000 and pci I/O window starting at 0xc0000000. > > Note: Those machine types have been removed from the qemu codebase > meanwhile because they could not be live-migrated so there was little > value in keeping them around. > > With the effort to allow for gigabyte-alignment of guest memory that > behavior was changed: The split was moved to 2G, but only in case the > memory didn't fit below 2.75 GB. > > So today the address space between 2G and 2,75G is not used for guest > memory in typical use cases, where the guest memory sized at a power of s/memory/memory is/ > two or a gigabyte number. But if you configure your guest with some odd > amout of memory (such as 2.5G) the address space is used. s/amout/amount/ > > This patch removes that oddity for 4.1+ machine types. The memory is > splitted at 2G no matter what. s/splitted/split/ > > Cc: László Érsek <ler...@redhat.com> > Signed-off-by: Gerd Hoffmann <kra...@redhat.com> > --- > include/hw/i386/pc.h | 1 + > hw/i386/pc.c | 1 + > hw/i386/pc_q35.c | 7 ++++++- > 3 files changed, 8 insertions(+), 1 deletion(-) > -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org
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