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    SubjectRe: [PROBLEM] 2.6.22-rc2 panics on x86-64 with slub
    --- Christoph Lameter <clameter@sgi.com> wrote:
    > I finally figured out the second issue. Took some time to get that figure
    > out. Sorry. But now all the bug reports make sense.

    [...]

    Impressive Christoph. Indeed, this fixes my problem on latest -git (its hg
    equivalent :-)). Well done.

    (Tested with CONFIG_SLAB_DEBUG without slub_debug; all was well. Then with
    slub_debug & slabinfo -v also; again all was well. I had many LOCKDEP and its
    relatives also compiled in.)

    Now hoping it'll be in 2.6.22-rc3 :-)).

    > Signed-off-by: Christoph Lameter <clameter@sgi.com>
    >
    > ---
    > mm/slub.c | 7 +++++++
    > 1 file changed, 7 insertions(+)
    >
    > Index: slub/mm/slub.c
    > ===================================================================
    > --- slub.orig/mm/slub.c 2007-05-25 18:28:42.000000000 -0700
    > +++ slub/mm/slub.c 2007-05-25 18:29:46.000000000 -0700
    > @@ -2473,6 +2473,7 @@ void __init kmem_cache_init(void)
    > */
    > create_kmalloc_cache(&kmalloc_caches[0], "kmem_cache_node",
    > sizeof(struct kmem_cache_node), GFP_KERNEL);
    > + kmalloc_caches[0].refcount = -1;
    > #endif
    >
    > /* Able to allocate the per node structures */
    > @@ -2520,6 +2521,12 @@ static int slab_unmergeable(struct kmem_
    > if (s->ctor)
    > return 1;
    >
    > + /*
    > + * We may have set a slab to be unmergeable during bootstrap.
    > + */
    > + if (s->refcount < 0)
    > + return 1;
    > +
    > return 0;
    > }



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