Re: 2.6.23 boot failures on x86-64.

Zou Nan hai
2007-10-31T06:11:23Z

On Tue, 2007-10-30 at 05:21, Martin Ebourne wrote:
> On Mon, 2007-10-29 at 15:43 -0400, Dave Jones wrote:
> > On Mon, Oct 29, 2007 at 08:03:09PM +0100, Andi Kleen wrote:
> > > > > But if allocating bootmem >4G doesn't work on these systems
> > > > > most likely they have more problems anyways. It might be better
> > > > > to find out what goes wrong exactly.
> > > > Any ideas on what to instrument ?
> > >
> > > See what address the bootmem_alloc_high returns; check if it overlaps
> > > with something etc.
> > >
> > > Fill the memory on the system and see if it can access all of its memory.
> >
> > Martin, as you have one of the affected systems, do you feel up to this?
>
> Faking a node at 0000000000000000-000000001fff0000
> Bootmem setup node 0 0000000000000000-000000001fff0000
> sparse_early_mem_map_alloc: returned address ffff81000070b000
>
> My box has 512MB of RAM.
>
> Cheers,
>
> Martin.

Oops, sorry,
seem to be a mistake of me.
I forget to exclude the DMA range.

Does the following patch fix the issue?

Thanks
Zou Nan hai

--- a/arch/x86/mm/init_64.c 2007-10-31 11:24:11.000000000 +0800
+++ b/arch/x86/mm/init_64.c 2007-10-31 12:31:02.000000000 +0800
@@ -731,7 +731,7 @@ int in_gate_area_no_task(unsigned long a
void * __init alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size)
{
return __alloc_bootmem_core(pgdat->bdata, size,
- SMP_CACHE_BYTES, (4UL*1024*1024*1024), 0);
+ SMP_CACHE_BYTES, (4UL*1024*1024*1024), __pa(MAX_DMA_ADDRESS));
}

const char *arch_vma_name(struct vm_area_struct *vma)