lkml.org 
[lkml]   [2007]   [Feb]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: sparc64 / bbc_i2c.c
    Hi Andrew

    > The code around there looks relatively unbuggy to me. Removing that
    > remove_wait_queue() would be very bad - it would cause later stack
    > corruption.
    >
    > msleep_interruptible() certainly shouldn't consume CPU like that. Do we
    > know where the CPU time is being spent? The output of:
    >
    > readprofile -r
    > sleep 10
    > readprofile -n -v -m /boot/System.map | sort -n -k 3 | tail -40
    >
    > would tell us.

    As was mentioned in another reply, this message by
    Joerg Friedrich

    http://lists.debian.org/debian-sparc/2007/02/msg00045.html

    gives a possible explanantion of where the time is going.
    I applied the patch to the debian kernel sources for 2.6.18,
    it applied cleanly and fixed the problem.

    I have the upatched kernel in /boot so I can run the tests
    you mentioned fairly easily -- please let me know if you'd
    still like me to do that.

    Jim
    --
    J.J. Green, Dept. Applied Mathematics, Hicks Bld.,
    University of Sheffield, UK. +44 (0114) 222 3742
    http://pdfb.wiredworkplace.net/pub/jjg


    -
    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: 2007-02-26 01:01    [W:0.021 / U:29.376 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site