lkml.org 
[lkml]   [2007]   [May]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [rfc] increase struct page size?!
    On Sat, 19 May 2007 11:15:01 -0700 William Lee Irwin III <wli@holomorphy.com> wrote:

    > Much the same holds for the atomic_t's; 32 + PAGE_SHIFT is
    > 44 bits or more, about as much as is possible, and one reference per
    > page per page is not even feasible. Full-length atomic_t's are just
    > not necessary.

    You can overflow a page's refcount by mapping it 4G times. That requires
    32GB of pagetable memory. It's quite feasible with remap_file_pages().

    -
    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: 2007-05-20 00:15    [W:0.021 / U:59.728 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site