Hmm. I tried console-kit-daemon, which I had installed, but didn't get
anything like that. Probably some setup difference.
I also went through every user of 'vm_area_cachep', and saw nothing
suspicious at least for the mmu case (I didn't check the nommu.c code). I
must have missed something.
One thing you could do is to add some more debugging info when that "no
anon_vma" warning happens. In particular, if you still have the SLUB
debugging on, you could try to do that
page = virt_to_head_page(vma);
object_err(vm_area_cachep, page, (void *)vma, "NULL anon_vma");
and it should give you _which_ routine did the kmem_cache_alloc() for the
vma that doesn't have an anon_vma.
Linus
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