Freeing unused kernel memory

From: Mark Farmer (farmerma_at_cromwell.co.uk)
Date: 02/21/05

  • Next message: Steve Buehler: "VPN to RHEL 3" 
    Date: Mon, 21 Feb 2005 14:35:26 +0000
To: General Red Hat Linux discussion list <redhat-list@redhat.com>

    Hi

    We have a server running AS 2.1 which stops booting after saying
    "freeing unused kernel memory: 248k freed" at this point I can
    ctrl+alt+del and the server reboots so it's not actually hung & if left
    long enough a message will apear on screen saying "aacraid:controller 0
    completed scrub test" which I suspect is comming from the raid
    controller itself & not the OS.
    I can boot from cd1 with 'linux rescue' & it mounts the install into
    /mnt/sysimage & I can chroot in no problem, start services etc.
    I've grabbed a copy of the logs while running in rescue mode but there
    is nothing at all near the time of the crash and nothing obvious in
    dmesg etc.

    After googleing i've tried passing (not all at the same time) 'apm=off'
    'acpi=off' 'vsdo=0' but none of these help.
    I don't know what the 'vsod=0' does, anyone?

    The last time the server ran under it's own steam we saw a kernel panic
    with a message about an error on cpu1, I have tried both smp & std
    kernels but neither will complete the boot process.

    Short of reinstalling the machine which seems a little drastic i'm at a
    loss here, does anyone have any ideas or indeed know of a fix?

    TIA 

    -- 
Mark Farmer
Linux System Administrator
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