Il 14/10/2014 06:54, Peter Maydell ha scritto:
> Why is this patch only changing this board? What's special
> about virt that means we don't want to also make this
> change for the other ARM boards? What about all the other
> boards for the other architectures?
-mem-path is not too useful without KVM (TCG is too slow to
notice the difference. PPC and S390 have already been fixed.
For other boards, I have patches but I had no time to submit
them until now.
> The commit message for 0b183fc871 suggests we decided to
> just break -mem-path for all those boards, which seems an
> odd thing to do... Paolo?
The plan _was_ in fact to fix it up. :(
> Incidentally I can't see anything that guards against
> calling memory_region_allocate_system_memory() twice,
> so I think you would end up with two blocks of RAM
> both backed by the same file then. Or have I misread
> the code?
That would be a bug in the board, it is caught here:
if (memory_region_is_mapped(seg)) {
char *path = object_get_canonical_path_component(OBJECT(backend));
error_report("memory backend %s is used multiple times. Each "
"-numa option must use a different memdev value.",
path);
exit(1);
}
The error message gives the common user error rather than
the less common developer error, but still you catch it.
Paolo
