On Wed, 2012-01-18 at 09:35 -0500, Dave Anderson wrote:
>
> >
> > Which causes this in crash/memory.c:vm_init()
> >
> > ARRAY_LENGTH_INIT(vt->kmem_cache_len_nodes, NULL,
> > "kmem_cache.nodelists", NULL, 0);
> >
> > to set vt->kmem_cache_len_nodes to 0, and leads to the initialization
> > failure when max_cpudata_limit calls getbuf with a size of 0.
> >
> > Got a fix in the works yet?
> >
> > Thanks,
> > Bob Montgomery
>
> No, afraid not. Fedora uses slub instead of slab, so I haven't
> noticed it. I wonder why kmem_cache_downsize() doesn't recalculate
> vt->kmem_cache_len_nodes based upon "nr_node_ids"?:
>
> if (buffer_size < SIZE(kmem_cache_s)) {
>
> if (kernel_symbol_exists("nr_node_ids")) {
> get_symbol_data("nr_node_ids", sizeof(int),
> &nr_node_ids);
> vt->kmem_cache_len_nodes = nr_node_ids;
>
> } else
> vt->kmem_cache_len_nodes = 1;
>
> Dave
This code is skipped because the buffer_size test is no longer true.
Also references to the nodeslist array are bad because it got changed
from an array to a pointer to an external array.
I have a fix and have tested it to give the same results on a *pre-3.1*
CONFIG_SLAB kernel (compared 6.0.2 to 6.0.2-fix on a 2.6.32 base), but
will now work on trying to verify that it's telling the truth about my
CONFIG_SLAB 3.1 kernel.
More later,
Bob Montgomery
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