Re: [PATCH v3] mm: make expand_downwards symmetrical to expand_upwards

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On Tue, 19 Apr 2011, Pekka Enberg wrote:

> On Tue, Apr 19, 2011 at 6:46 PM, James Bottomley
> <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote:
> > It compiles OK, but crashes on boot in fsck.  The crash is definitely mm
> > but looks to be a slab problem (it's a null deref on a spinlock in
> > add_partial(), which seems unrelated to this patch).

That means that the per node structures have not been setup yet. Node
hotplug not working?

> > It seems to be a random intermittent mm crash because the next reboot
> > crashed with the same trace but after the fsck had completed and the
> > third came up to the login prompt.
>
> Looks like a genuine SLUB problem on parisc. Christoph?

Race between node hotplug and use of the slab on that node?

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