[lkml]   [2000]   [Sep]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: More on 2.2.18pre2aa2
    On Tue, 12 Sep 2000, Alan Cox wrote:

    >Andrea - latency is time measured and perceived. Doing it time based seems to
    >make reasonable sense. I grant you might want to play with the weighting per

    When you have a device that writes a request every two seconds you still
    want it not to seek all the time because this would mean to make it even
    slower. No? The point very is simple: if you want good latency buy a
    faster hardware (and with a faster hardware our current elevator can
    become even more aggressive than the 1/2 second thing). You can't
    workaround the slowness of a slow device by putting the elevator in
    function of time, that will only make the global system even slower.

    BTW, about the rest of the proposal we're just doing that. It's just that
    we don't do that in function of time, but in function of how many requests
    are passing a certain request. When too many request passed a certain
    request, we stop further requests to pass it again. Simple. You control
    the "how many request can pass a request" factor via elvtune. Read and
    writes have different factors.


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

     \ /
      Last update: 2005-03-22 12:38    [W:0.022 / U:10.644 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site