Hi Manfred,
> Very odd call chain.
> Could you enable slab debugging?
Sonny and I had a look around, it seems to be in the
cpuup_callback() / CPU_DEAD case:
if (!cpus_empty(mask)) {
spin_unlock(&l3->list_lock);
goto unlock_cache;
}
if (l3->shared) {
free_block(cachep, l3->shared->entry,
l3->shared->avail, node);
kfree(l3->shared); <-------- HERE
l3->shared = NULL;
}
So we are removing the last cpu in a node, and tearing down the node
related structures. We looked at kfree() -> __cache_free() and we couldnt
convince ourselves that all the CONFIG_NUMA stuff in there wouldnt trip
over itself (since we would be doing the free on an alien node).
Anton
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