[lkml]   [2002]   [Aug]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH] low-latency zap_page_range()
    On Thu, 29 Aug 2002, Andrew Morton wrote:

    > > So we know it is held forever and a day... but is there contention?
    > I'm sure there is, but nobody has measured the right workload.
    > Two CLONE_MM threads, one running mmap()/munmap(), the other trying
    > to fault in some pages. I'm sure someone has some vital application
    > which does exactly this. They always do :(

    Can't fix this one. The mmap()/munmap() needs to have the
    mmap_sem for writing as long as its setting up or tearing
    down a VMA while the pagefault path takes the mmap_sem for

    It might be fixable in some dirty way, but I doubt that'll
    ever be worth it.


    Bravely reimplemented by the knights who say "NIH".

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:28    [W:0.021 / U:3.356 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site