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migration: only check page size match if RAM postcopy is enabled

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Postcopy may also be advised for dirty-bitmap migration only, in which
case the remote page size will not be available and we'll instead read
bogus data, blocking migration with a mismatch error if the VM uses
hugepages.

Fixes: 58110f0acb ("migration: split common postcopy out of ram postcopy")
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
Message-Id: <20210204163522.13291-1-s.reiter@proxmox.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Stefan Reiter 2021-02-04 17:35:22 +01:00 committed by Dr. David Alan Gilbert
parent 0f0d83a456
commit e846b74650
1 changed files with 1 additions and 1 deletions
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2
migration/ram.c
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@ -3808,7 +3808,7 @@ static int ram_load_precopy(QEMUFile *f)
}
}
/* For postcopy we need to check hugepage sizes match */
if (postcopy_advised &&
if (postcopy_advised && migrate_postcopy_ram() &&
block->page_size != qemu_host_page_size) {
uint64_t remote_page_size = qemu_get_be64(f);
if (remote_page_size != block->page_size) {