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    SubjectRe: 2.6.11.7 kernel panic on boot on AMD64
    On Thu, Apr 28, 2005 at 09:47:21AM -0700, Randy.Dunlap wrote:
    > On Fri, 29 Apr 2005 00:38:24 +0800
    > Coywolf Qi Hunt <coywolf@gmail.com> wrote:
    >
    > > On 4/28/05, Randy.Dunlap <rddunlap@osdl.org> wrote:
    > > > On Thu, 28 Apr 2005 11:05:40 +0200
    > > > Ruben Puettmann <ruben@puettmann.net> wrote:
    > > >
    > > > > On Wed, Apr 27, 2005 at 03:27:04PM -0700, Randy.Dunlap wrote:
    > > > > Looks like this code in init/main.c:
    > > > > >
    > > > > > if (late_time_init)
    > > > > > late_time_init();
    > > > > >
    > > > > > sees a garbage value in late_time_init (garbage being
    > > > > > %eax == 0x00307974.743d656c, which is "le=tty0\n",
    > > > > > as in "console=tty0").
    > > > > >
    > > > > > How long is your kernel boot/command line?
    > > > > > Please post it.
    > > > >
    > > > > It was boot over pxe here is the append line from the
    > > > > pxelinux.cfg/default
    > > > >
    > > > > APPEND vga=normal rw load_ramdisk=0 root=/dev/nfs nfsroot=192.168.112.1:/store/rescue/sarge-amd64,rsize=8192,wsize=8192,timo=12,retrans=3,mountvers=3,nfsvers=3
    > > >
    > > > Hm, no "console=tty...." at all. That didn't help (me) much.
    > >
    > > Could that boot loader pxe append console=tty implicitly?
    >
    > It could... I don't know anything about pxe boot.
    >
    >
    > > >From the vmlinux Ruben gave me,
    > > ffffffff807980d8 A __bss_start
    > > ffffffff807980d8 A _edata
    > > ffffffff80798100 B boot_cpu_stack
    > > ffffffff8079c100 B boot_exception_stacks
    > > ffffffff807a1100 B system_state
    > > ffffffff807a1120 B saved_command_line
    > > ffffffff807a1220 B late_time_init
    > > ffffffff807a1228 b execute_command
    > > ffffffff807a1230 b panic_later
    > > ffffffff807a1238 b panic_param
    > > ...
    > >
    > > It seems possible to luckily skip the garbage. Comment out the two
    > > lines and see if it works.
    > >
    > > /* if (late_time_init)
    > > late_time_init(); */
    >
    > Yes, that would help verify that the command line is the problem.
    > I also recall Andi having a few problems with large command lines
    > on x86-64... so it still smells like that to me. (ak added to cc:)


    late_time_init is not in my tree. Someone else must have submitted it.
    iirc it was a workaround for some race in the NMI watchdog setup, but
    that has since then be properly fixed.

    I would recommend to just drop the patch.


    -Andi
    -
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