Il 03/07/2014 12:45, Ming Lei ha scritto:
I think it may be needed:- following requests coming inside handle_notify(): req0, req1, req2-flush, req3 - both req0 and req1 queued - start to handle req2-flush - bdrv_co_flush() calls bdrv_co_flush(bs->file), which finally call raw_aio_flush() to send command, but the 1st two requests should have been submitted to fs before the flush action
No, bdrv_aio_flush is only guaranteed to flush requests that _completed_ before it was sent.
Since we haven't yet told the guest that req0 and req1 are complete, there is no need to submit them before req2-flush.
Paolo
