Messages in this thread | | | Date | Tue, 15 Apr 2008 12:39:26 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [bug] SLUB + mm/slab.c boot crash in -rc9 |
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On Tue, 15 Apr 2008, Linus Torvalds wrote:
> On Tue, 15 Apr 2008, Ingo Molnar wrote: > > > > btw., now with a second full day spent on this regression, i have > > figured out a workaround the hard way: increasing SECTION_SIZE_BITS in > > include/asm-x86/sparsemem.h from 26 to 27 makes it go away. > > Interesting.
Hmmmm. SECTION_SIZE_BITS == 26 means SECTIONS_SHIFT == 6. Increasing SECTION_SIZE_BITS to 27 reduces SECTION_SHIFT to 5. Thereby the number of sparsemem sections (NR_MEM_SECTIONS) is reduced to half (64 to 32).
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