lkml.org 
[lkml]   [2007]   [Mar]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Question about memory mapping mechanism
    On Thu, 8 Mar 2007, Martin Drab wrote:

    > On Thu, 8 Mar 2007, Carsten Otte wrote:
    >
    > > On 3/8/07, Martin Drab <drab@kepler.fjfi.cvut.cz> wrote:
    > > >
    > > > The thing is that I'd like to prevent kernel to swap these pages out,
    > > > because then I may loose some data when they are not available in time
    > > > for the next round.
    > >
    > > One think you could do is grab a reference to the pages upfront.
    >
    > I'm not really sure what exactly do you mean by "grab a reference
    > upfront"?

    I seem to get it now. So instead of setting PG_reserved upon allocation of
    the buffer pages, I should increase the referrence of the pages by calling
    get_page() on them and that would prevent the pages to get on the lru list
    and thus preventing them to be swapped out. Is that it?

    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: 2007-03-09 01:09    [W:0.020 / U:179.132 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site