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    SubjectRe: [bug] SLUB + mm/slab.c boot crash in -rc9
    On Tue, Apr 15, 2008 at 9:25 AM, Ingo Molnar <mingo@elte.hu> wrote:
    > so it's probably the first few page allocations (setup_cpu_cache())
    > going wrong already - suggesting a some fundamental borkage in SLAB?

    I think it's still pointing to the page allocator and/or setting up
    the zonelists...

    > note, when i change SLAB to SLUB (and keep the config unchanged
    > otherwise), i get a similar early crash:

    ...especially considering you have similar crash with SLUB as well.

    Now this:

    [ 0.000999] ------------[ cut here ]------------
    [ 0.000999] WARNING: at mm/slab.c:1685 cache_alloc_refill+0x2a6/0x4a3()
    [ 0.000999] Pid: 0, comm: swapper Not tainted 2.6.25-rc9 #924
    [ 0.000999] [<c0121b6f>] warn_on_slowpath+0x3c/0x4c
    [ 0.000999] [<c0781873>] ? _spin_unlock_irqrestore+0xf/0x13
    [ 0.000999] [<c02941ad>] ? delay_tsc+0x2e/0x4e
    [ 0.000999] [<c029414d>] ? __delay+0x9/0xb
    [ 0.000999] [<c0353db3>] ? serial8250_console_putchar+0x80/0x86
    [ 0.000999] [<c0148822>] ? get_page_from_freelist+0x230/0x345
    [ 0.000999] [<c0121eb1>] ? __call_console_drivers+0x56/0x63
    [ 0.000999] [<c01489bb>] ? __alloc_pages+0x6e/0x2be
    [ 0.000999] [<c015bd2e>] cache_alloc_refill+0x2a6/0x4a3
    [ 0.000999] [<c015ba3f>] kmem_cache_alloc+0x5b/0xa4

    Says that alloc_pages_node() returned NULL early on in the boot.
    However, GFP_THISNODE is ruled out as this:

    Index: linux/mm/page_alloc.c
    ===================================================================
    --- linux.orig/mm/page_alloc.c
    +++ linux/mm/page_alloc.c
    @@ -1485,6 +1485,7 @@ restart:
    * Happens if we have an empty zonelist as a result of
    * GFP_THISNODE being used on a memoryless node
    */
    + WARN_ON(1);
    return NULL;
    }

    does not trigger. Hmm...

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