Il 11/04/2012 04:42, Liu Yuan ha scritto: > 1) if we use bdrv_close(), we rely on the assumption that backend > storage will do flushing while interpreting this operation. This > assumption might not always hold, for e.g, current sheepdog doesn't do > flushing for bdrv_close(). So bdrv_flush() will be the safest method to > push the data back. > 2) explicit flushing is more maintainable, we don't need to guess if it > does flushing internally if we use other function that flush implicitly.
I think it is reasonable semantics that closing gets all data to storage. Paolo
