Hi Mikulas, > The decision whether bio is counted or not is made by the code that > submits the bio. This leads to some problems: How about convering dm targets to use generic_make_request? Since submit_bio counts vm events, it seems natural for caller to decide which function to use. Device driver does not know whether the requested I/O is for vm-to-device or device-to-device. We could still use iostat to measure throughput of individual block devices. Thanks, -- Jun'ichi Nomura, NEC Corporation -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
