lkml.org 
[lkml]   [2009]   [Apr]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: Swappiness vs. mmap() and interactive response
    From
    >> Mapped page decrease rapidly: not happend (I guess, these page stay in
    >>                                           active list on my system)
    >> page fault large latency:     happend (latencytop display >200ms)
    >
    > hm.  The last two observations appear to be inconsistent.

    it mean existing process don't slow down. but new process creation is very slow.


    > Elladan, have you checked to see whether the Mapped: number in
    > /proc/meminfo is decreasing?
    >
    >>
    >> Then, I don't doubt vm replacement logic now.
    >> but I need more investigate.
    >> I plan to try following thing today and tommorow.
    >>
    >>  - XFS
    >>  - LVM
    >>  - another io scheduler (thanks Ted, good view point)
    >>  - Rik's new patch
    >
    > It's not clear that we know what's happening yet, is it?  It's such a
    > gross problem that you'd think that even our testing would have found
    > it by now :(

    Yes, unclear. but various testing can drill down the reason, I think.


    > Elladan, do you know if earlier kernels (2.6.26 or thereabouts) had
    > this severe a problem?
    >
    > (notes that we _still_ haven't unbusted prev_priority)
    --
    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: 2009-04-29 09:55    [W:0.023 / U:7.408 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site