lkml.org 
[lkml]   [2006]   [Sep]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [RFC] Initial alpha-0 for new page allocator API
    On Fri, 22 Sep 2006, Andi Kleen wrote:

    > On Friday 22 September 2006 06:02, Christoph Lameter wrote:
    > > We have repeatedly discussed the problems of devices having varying
    > > address range requirements for doing DMA.
    >
    > We already have such an API. dma_alloc_coherent(). Device drivers
    > are not supposed to mess with GFP_DMA* directly anymore for quite
    > some time.

    Device drivers need to be able to indicate ranges of addresses that may be
    different from ZONE_DMA. This is an attempt to come up with a future
    scheme that does no longer rely on device drivers referring to zoies.

    > > We would like for the device
    > > drivers to have the ability to specify exactly which address range is
    > > allowed.
    >
    > I actually have my doubts it is a good idea to add that now. The devices
    > with weird requirements are steadily going away

    Hmm.... Martin?

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2006-09-22 18:39    [W:0.021 / U:121.308 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site