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migration: sync all address spaces

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Migrating a VM during reboot sometimes results in differences
between the source and destination in the SMRAM area.

This is because migration_bitmap_sync() only fetches from KVM
the dirty log of address_space_memory.  SMRAM memory slots
are ignored and the modifications to SMRAM are not sent to the
destination.

Reported-by: He Rongguang <herongguang.he@huawei.com>
Reviewed-by: He Rongguang <herongguang.he@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-09-22 16:08:31 +02:00
parent cc9d8a3b2c
commit 9c1f8f4493
3 changed files with 37 additions and 18 deletions
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2
migration/ram.c
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@ -626,7 +626,7 @@ static void migration_bitmap_sync(void)
}
trace_migration_bitmap_sync_start();
address_space_sync_dirty_bitmap(&address_space_memory);
memory_global_dirty_log_sync();
qemu_mutex_lock(&migration_bitmap_mutex);
rcu_read_lock();