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    SubjectRe: 2.6.15-rc5-mm3 -- BUG: using smp_processor_id() in preemptible [00000001] code: swapper/1
    Andrew Morton <akpm@osdl.org> wrote:
    >
    > > Here's the BUG output:
    > >
    > > [4294671.538000] Freeing unused kernel memory: 220k freed
    > > [4294671.538000] BUG: using smp_processor_id() in preemptible
    > > [00000001] code: swapper/1
    > > [4294671.539000] caller is mod_page_state_offset+0x12/0x28
    > > [4294671.539000] [<c1003723>] dump_stack+0x16/0x1a
    > > [4294671.539000] [<c110c1eb>] debug_smp_processor_id+0x77/0x90
    > > [4294671.539000] [<c10413d3>] mod_page_state_offset+0x12/0x28

    This'll plug the above.

    Nick, please turn on the nice debugging options in future?


    diff -puN mm/page_alloc.c~mm-page_state-opt-fix mm/page_alloc.c
    --- devel/mm/page_alloc.c~mm-page_state-opt-fix 2005-12-15 00:50:56.000000000 -0800
    +++ devel-akpm/mm/page_alloc.c 2005-12-15 00:51:07.000000000 -0800
    @@ -1389,8 +1389,8 @@ void mod_page_state_offset(unsigned long
    unsigned long flags;
    void *ptr;

    - ptr = &__get_cpu_var(page_states);
    local_irq_save(flags);
    + ptr = &__get_cpu_var(page_states);
    *(unsigned long *)(ptr + offset) += delta;
    local_irq_restore(flags);
    }
    _
    -
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