Re: U Area Removal

From: Marcel Moolenaar (marcel_at_xcllnt.net)
Date: 11/11/04

  • Next message: John Baldwin: "Re: Booting questions ...." 
    Date: Wed, 10 Nov 2004 23:53:38 -0800
To: David Schultz <das@freebsd.org>

    On Nov 10, 2004, at 7:00 PM, David Schultz wrote:

    > I propose to remove the ability to swap the U area, allocating p_stats
    > from malloced memory instead. Medium-term scheduling and swapping of
    > kernel stacks would be retained. Here are the patches; !i386 testers
    > wanted:
    >
    > http://www.freebsd.org/~das/patches/upages.diff
    >

    I got the following on ia64:

            :
    Mounting root from ufs:/dev/da0p2
    init died (signal 6, exit 0)
    panic: Going nowhere without my init!
    KDB: enter: panic
    [thread 100003]
    Stopped at kdb_enter+0x81: [F1] nop.f 0x0
    db> trace
    kdb_enter(0xe0000000045e7db8, 0xe00000000428c9d0, 0x896,
    0xa000000019f031e8) at kdb_enter+0x81
    panic(0xe0000000045e5570, 0x6, 0x0, 0xe00000000737ae50,
    0xe000000004521bd0) at panic+0x1c0
    exit1(0xe00000003e5fe780, 0x6, 0x4, 0xe0000000046ce100,
    0xe0000000046ce100) at exit1+0xd0
    kern_execve(0xe00000003e5fe780, 0x9ffffffffffffff2, 0x2,
    0xe0000000046cd820, 0x4, 0x2, 0xc, 0xa000000019f032e0) at
    kern_execve+0x1d40
    start_init(0x9fffffffffffffd8, 0x9ffffffffffffff2, 0xe00000000468f0a2,
    0xe00000000468f098, 0x9ffffffffffffffd) at start_init+0x7a0
    fork_exit(0xe00000000460c640, 0x0, 0xa000000019f03550) at
    fork_exit+0x120
    enter_userland() at enter_userland
    db>

    I have to triage this, but that's not for today (in 7 minutes it will
    be tomorrow :-) 

    -- 
  Marcel Moolenaar         USPA: A-39004          marcel@xcllnt.net
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