[lkml]   [2002]   [Mar]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [patch] My AMD IDE driver, v2.7
    Linus Torvalds wrote:

    >On Mon, 11 Mar 2002, Linus Torvalds wrote:
    >> - attach to one or more request queue(s). Notice that you should not have
    >> _one_ module that handles all request queues, because the filter module
    >> obviously has to be different for an ATA disk than for a SCSI disk, and
    >> in fact it might be different for an IBM ATA disk than for a Maxtor ATA
    >> disk, for example.
    >Btw, to tie this back to the other IDE thread, namely the suspend/resume
    >thing, I think things like that should also just push commands down the
    >request list. In particular, instead of waiting until the handler is NULL,
    >it should do something like
    > - create a "sync" request
    > - do the equivalent of
    > rq->waiting = &wait;
    > q->elevator.elevator_add_req_fn(q, rq, queue_head);
    > wait_for_completion(&wait);
    >which automatically synchronizes with any outstanding requests (simply
    >by virtue of the elevator knowing not to re-order/merge special requests,
    >so when the sync command in finished, we know all other commands have
    >finished too).

    Dumb question, why create a separate request?

    Why not just have some way to wait for request X (and flag it for
    no-merge/barrier treatment, etc.)? bios have end_io callbacks...


    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:24    [W:0.028 / U:15.624 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site