[lkml]   [2009]   [Dec]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH] laptop-mode: Make flushes per-device
    On Fri, Dec 11 2009, Matthew Garrett wrote:
    > One of the features of laptop-mode is that it forces a writeout of dirty
    > pages if something else triggers a physical read or write from a device.
    > The current implementation flushes pages on all devices, rather than only
    > the one that triggered the flush. This patch alters the behaviour so that
    > only the recently accessed block device is flushed, preventing other
    > disks being spun up for no terribly good reason.
    > Signed-off-by: Matthew Garrett <>
    > ---
    > The forward struct declaration in writeback.h seems messy, but I'm not
    > sure there's a cleaner way to do this. I'm also still woefully
    > unfamiliar with the block layer - I /think/ this does the right thing,
    > but some review would be nice.

    That's because it is messy, why are you passing the request in? It
    would be a lot more sane to pass in the queue, better still the backing

    What guarentees that the timer isn't running when the bdi goes away?

    Jens Axboe

     \ /
      Last update: 2009-12-12 13:27    [W:0.018 / U:49.096 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site