From: Dr. David Alan Gilbert Date: Mon, 12 Mar 2018 17:21:22 +0000 (+0000) Subject: postcopy: Allow shared memory X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=29d8fa7f734ec4c55135e85e2d25d1650c8c5985;p=qemu.git postcopy: Allow shared memory Now that we have the mechanisms in here, allow shared memory in a postcopy. Note that QEMU can't tell who all the users of shared regions are and thus can't tell whether all the users of the shared regions have appropriate support for postcopy. Those devices that explicitly support shared memory (e.g. vhost-user) must check, but it doesn't stop weirder configurations causing problems. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Marc-André Lureau Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c index 7d4396fe95..efd77939af 100644 --- a/migration/postcopy-ram.c +++ b/migration/postcopy-ram.c @@ -215,12 +215,6 @@ static int test_ramblock_postcopiable(const char *block_name, void *host_addr, RAMBlock *rb = qemu_ram_block_by_name(block_name); size_t pagesize = qemu_ram_pagesize(rb); - if (qemu_ram_is_shared(rb)) { - error_report("Postcopy on shared RAM (%s) is not yet supported", - block_name); - return 1; - } - if (length % pagesize) { error_report("Postcopy requires RAM blocks to be a page size multiple," " block %s is 0x" RAM_ADDR_FMT " bytes with a "