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    SubjectRe: Possible memory leak via alloc_pid()
    On 07/31, Catalin Marinas wrote:
    > On Thu, 2009-07-30 at 23:29 +0200, Oleg Nesterov wrote:
    > >
    > > Since you can reproduce the problem easily, perhaps you can use the
    > > hack above to track get/put ?
    > >
    > > $ echo pid_of_Xorg > /proc/sys/kernel/xxx
    > Below is the minicom capture. By the time Xorg dies, the count is 2.

    Thanks a lot Catalin.

    > When logging out, there are two counter incrementing events via
    > sys_wait4 and sys_ioctl, thoush I'm not sure whether they are
    > unbalanced.

    wait4() is right, ioctl() looks fine too.

    > pgrep Xorg
    > 1519
    > 10:~# pgrep Xorg > /proc/sys/kernel/xxx
    > XXXXX(1519) ==22

    Unfortunately there is nothing which looks like a leak. I gueess it is
    too late to start the tracking.

    I'm afraid this won't really help too, but since nobody has a better
    idea for now, perhaps you can do another test?

    Pleas rename Xorg to Xorg.origin, and make a simple Xorg script which
    does something like


    echo $$ >> /proc/sys/kernel/xxx
    exec /path/to/Xorg.origin $*

    perhaps even this is too late, gdm can do a lot before execing.

    Please avoid pgrep/ps/etc, proc adds a lot of noise. Better yet, it
    would be nice to start/stop Xorg with /proc unmounted, but I don't
    know is this can work without /proc.


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      Last update: 2009-08-02 23:45    [W:0.022 / U:29.540 seconds]
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