[Bug 87891] New: kernel BUG at mm/slab.c:2625!

[Joonsoo Kim]

On Tue, Nov 11, 2014 at 05:02:43PM -0800, Andrew Morton wrote:
> On Wed, 12 Nov 2014 00:54:01 +0000 Luke Dashjr <luke at dashjr.org> wrote:
> 
> > On Wednesday, November 12, 2014 12:49:13 AM Andrew Morton wrote:
> > > But anyway - Luke, please attach your .config to
> > > https://bugzilla.kernel.org/show_bug.cgi?id=87891?
> > 
> > Done: https://bugzilla.kernel.org/attachment.cgi?id=157381
> > 
> 
> OK, thanks.  No CONFIG_HIGHMEM of course.  I'm stumped.

Hello, Andrew.

I think that the cause is GFP_HIGHMEM.
GFP_HIGHMEM is always defined regardless CONFIG_HIGHMEM.
Please look at the do_huge_pmd_anonymous_page().
It calls alloc_hugepage_vma() and then alloc_pages_vma() is called
with alloc_hugepage_gfpmask(). This gfpmask includes GFP_TRANSHUGE
and then GFP_HIGHUSER_MOVABLE.

Thanks.