On April 14, 2014 8:21:05 PM GMT+05:30, KASHISH BHATIA <[email protected]> wrote: >Hi all, > >Could anyone explain the difference between submit_bio() and >generic_make_request() ? >How they are different in functionality? >How lower layers treat bios submitted via submit_bio() / >generic_make_request() ? >When is it preferable to use api generic_make_request() than >submit_bio()
A request has bio(s). You normally would bio_alloc then set up your bio and finally get a reference to it and submit_bio. At this point you would be in file system layer. After submit you enter block layer which would either try to merge that bio with an existing request or create a new request for the lower level driver. >api? The usage is clearly separate. Submit the bio from file system, create the request for the driver in block layer. -- Sent from my Android device with K-9 Mail. Please excuse my brevity. _______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
