lkml.org 
[lkml]   [2012]   [Apr]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Hang opening a pipe written to by a child, with SIGCHLD
    On Mon, Apr 02, 2012 at 10:49:10AM -0400, Shea Levy wrote:
    > On 04/02/2012 10:46 AM, Lluís Batlle i Rossell wrote:
    > >Can anyone reproduce this?
    >
    > I've reproduced this on my system as well (3.3). No idea about cause though.
    >

    Thank you Shea,

    with a little change, adding "sleep 0.1" makes it hang early in all (few)
    linuces I tried: Let me know if this helps you reproduce the problem.

    As before, hangs under strace, does not hang under 'strace -f'. Sorry if I'm
    misunderstanding something.

    New script:
    ----------
    #!/bin/sh

    PIPE=/tmp/pipe

    rm -f $PIPE
    mkfifo $PIPE
    set -x

    spawn() {
    sleep 0.1
    echo DONE > $PIPE
    }

    spawn &

    while true; do
    while read LINE < $PIPE; do
    echo $LINE
    spawn &
    done
    done
    -----------

    Regards,
    Lluís.
    --
    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: 2012-04-02 20:53    [W:0.022 / U:59.916 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site