lkml.org 
[lkml]   [2006]   [Mar]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [ck] 2.6.16-ck1
    Hi Rodney,

    Thanks for your testing :)

    On Thu, Mar 23, 2006 at 05:31:18AM -0600, Rodney Gordon II wrote:
    > Adaptive readahead: I had probs with this before, and I still do.. On
    > a desktop if you have odd problems (nothing responding for SECONDS,
    > very slow disk I/O during heavy I/O, etc..) disable it.

    Your problem on I/O latency with ara can be tracked down with the help
    of Ingo's latency tracing patch. It goes like this:

    1) download
    http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.16.tar.bz2
    http://www.vanheusden.com/ara/adaptive-readahead-11-2.6.16-rc6.patch.gz
    http://people.redhat.com/mingo/latency-tracing-patches/latency-tracing-v2.6.16.patch

    2)
    tar jxf linux-2.6.16.tar.bz2
    gunzip adaptive-readahead-11-2.6.16-rc6.patch.gz
    cd linux-2.6.16
    patch -p1 < ../adaptive-readahead-11-2.6.16-rc6.patch
    patch -p1 < ../latency-tracing-v2.6.16.patch

    3) compile kernel with Adaptive readahead support
    4) boot with the new kernel, and run
    echo 0 > /proc/sys/kernel/preempt_max_latency
    5) feel some latency problems
    6) report the content of /proc/latency_trace

    Thanks,
    Wu
    -
    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: 2006-03-23 14:09    [W:6.080 / U:0.012 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site