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kern.maxpipekva exceeded, please see tuning(7) - FreeBSD

I have seen a mention or two of this error on the lists before, including this link to the "current" list I pulled up from Google: http://lists.freebsd.org/pipermail/freebsd-current/2004-January/019150.html In my case, the errors began after my exploratory two-year-old found the shiny 'reset' button and could not resist its powers. I'm also getting HDD error messages on boot, 'fsck -y' shows all the file systems as read-only and returns errors on one of them, and I can no longer SSH into my system (due to, I assume, too many open file handles), or even get a command in on my console without ...

  1. #1

    Default kern.maxpipekva exceeded, please see tuning(7)

    I have seen a mention or two of this error on the lists before,
    including this link to the "current" list I pulled up from Google:
    http://lists.freebsd.org/pipermail/freebsd-current/2004-January/019150.html

    In my case, the errors began after my exploratory two-year-old found
    the shiny 'reset' button and could not resist its powers. I'm also
    getting HDD error messages on boot, 'fsck -y' shows all the file
    systems as read-only and returns errors on one of them, and I can no
    longer SSH into my system (due to, I assume, too many open file
    handles), or even get a command in on my console without an error
    popping in..

    The solution does not seem clear cut to me, and it seems the error
    message itself does not provide valid (or, at least, sufficient)
    information.

    Could someone please help, or point me in the right direction?

    Thanks, as always,
    John
    John Guest

  2. #2

    Default Re: kern.maxpipekva exceeded, please see tuning(7)

    On 03/13/05 15:44:32, John DeStefano wrote: 

    FreeBSD is very robust with power failures, but that was a reset
    button. Do you have acpi on? When I hit my power button every once in
    a while my system shuts down properly. Try booting into single user
    mode and do a manual mount and fsck.

    And just to help you out:

    $ sysctl -ad | grep pipekva
    kern.ipc.maxpipekva: Pipe KVA limit
    kern.ipc.pipekva: Pipe KVA usage
    $ sysctl -a | grep pipekva
    kern.ipc.maxpipekva: 8634368
    kern.ipc.pipekva: 344064

    $ uname -a
    FreeBSD BARTON 5.4-PRERELEASE FreeBSD 5.4-PRERELEASE #5: Mon Mar 7
    20:51:09 EST 2005 jasonBARTON:/usr/obj/usr/src/sys/NINAMORI i386
    $

    Jason Guest

  3. #3

    Default Re: kern.maxpipekva exceeded, please see tuning(7)

    On Sun, Mar 13, 2005 at 03:44:32PM -0500, John DeStefano wrote: 

    Did you read the tuning(7) manpage, as instructed?

    Kris
    Kris Guest

  4. #4

    Default Re: kern.maxpipekva exceeded, please see tuning(7)

    On Mon, 14 Mar 2005 17:38:54 +0000, Kris Kennaway <org> wrote: 
    >
    > Did you read the tuning(7) manpage, as instructed?
    >
    > Kris
    >[/ref]
    Hi Kris,

    Yes, and it contained quite a bit of informaiton. But it does not
    seem to contain this error directly, nor any procedural information on
    how to alleviate the error.

    I also read here:
    http://lists.freebsd.org/pipermail/freebsd-current/2004-January/019150.html
    "the error message is incorrect." and "This value is loader tunable only."

    And here:
    http://www.linuxquestions.org/questions/archive/17/2004/11/3/255979
    "Unfortunately the man page for tunining doesn't seem to have anything
    specifically about increasing the value of kern.ipc.maxpipekva".

    I have the box working as a dumb terminal, and I'm no longer able to
    SSH in. Apparently, I can set the values of the kernel parameters I
    need to change either at boot time, or in loader.conf. I will try
    that, once I attach a montitor and keys and figure out how to do it,
    along with which parameters I need to change, and what the values
    should be for my system.

    By the way: thank you for responding to me, and copying the list, as I
    thought was the best-practice protocol for the list; it seems to have
    become a forgotten art.

    Thanks,
    ~John
    John Guest

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