lkml.org 
[lkml]   [2002]   [Dec]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Maybe a VM bug in 2.4.18-18 from RH 8.0?
    William Lee Irwin III wrote:
    >> Yes, it's necessary; no, I've never directly encountered the issue it
    >> fixes. Sorry about the miscommunication there.

    On Thu, Dec 05, 2002 at 09:25:15PM -0800, Andrew Morton wrote:
    > Linus's approach was to raise the ZONE_NORMAL pages_min limit for
    > allocations which _could_ use highmem. So a GFP_HIGHUSER allocation
    > has a pages_min limit of (say) 4M when considering the normal zone,
    > but a GFP_KERNEL allocation has a limit of 2M.
    > Andrea's patch does the same thing, via a separate table. He has
    > set the threshold much higher (100M on a 4G box). AFAICT, the
    > algorithms are identical - I was planning on just adding a multiplier
    > to set Linus's ratio - it is currently hardwired to "1". Search for
    > "mysterious" in mm/page_alloc.c ;)

    There's no mystery here aside from a couple of magic numbers and a
    not-very-well-explained admission control policy.

    Tweaking magic numbers a la 2.4.x-aa until more infrastructure is
    available (2.7) sounds good to me.

    Thanks,
    Bill
    -
    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: 2005-03-22 13:31    [W:0.022 / U:30.212 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site