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Date: Sun, 8 Mar 2009 16:16:14 -0700
From: Yinghai Lu <yinghai@...nel.org>
To: linux-tip-commits@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
Greg KH <gregkh@...e.de>
Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
yinghai@...nel.org, akpm@...ux-foundation.org, tglx@...utronix.de,
stable@...nel.org
Subject: Re: [tip:x86/mm] x86: fix bootmem cross node for 32bit numa
we may need this one (and two followings one) to be applied for
stable with 2.6.27, 2.6.28, 2.6.29.
YH
On Wed, Mar 4, 2009 at 1:00 PM, Yinghai Lu <yinghai@...nel.org> wrote:
> Commit-ID: a71edd1f46c8a599509bda478fb4eea27fb0da63
> Gitweb: http://git.kernel.org/tip/a71edd1f46c8a599509bda478fb4eea27fb0da63
> Author: "Yinghai Lu" <yinghai@...nel.org>
> AuthorDate: Wed, 4 Mar 2009 01:22:35 -0800
> Commit: Ingo Molnar <mingo@...e.hu>
> CommitDate: Wed, 4 Mar 2009 20:55:03 +0100
>
> x86: fix bootmem cross node for 32bit numa
>
> Impact: fix panic on system 2g x4 sockets
>
> Found one system with 4 sockets and every sockets has 2g can not boot
> with numa32 because boot mem is crossing nodes.
>
> So try to have numa version of setup_bootmem_allocator().
>
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> LKML-Reference: <49AE485B.8000902@...nel.org>
> Signed-off-by: Ingo Molnar <mingo@...e.hu>
>
>
> ---
> arch/x86/mm/init_32.c | 46 ++++++++++++++++++++++++++++++++++++++++------
> arch/x86/mm/numa_32.c | 5 +++--
> 2 files changed, 43 insertions(+), 8 deletions(-)
>
> diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
> index 917c4e6..67bdb59 100644
> --- a/arch/x86/mm/init_32.c
> +++ b/arch/x86/mm/init_32.c
> @@ -776,9 +776,37 @@ static void __init zone_sizes_init(void)
> free_area_init_nodes(max_zone_pfns);
> }
>
> +#ifdef CONFIG_NEED_MULTIPLE_NODES
> +static unsigned long __init setup_node_bootmem(int nodeid,
> + unsigned long start_pfn,
> + unsigned long end_pfn,
> + unsigned long bootmap)
> +{
> + unsigned long bootmap_size;
> +
> + if (start_pfn > max_low_pfn)
> + return bootmap;
> + if (end_pfn > max_low_pfn)
> + end_pfn = max_low_pfn;
> +
> + /* don't touch min_low_pfn */
> + bootmap_size = init_bootmem_node(NODE_DATA(nodeid),
> + bootmap >> PAGE_SHIFT,
> + start_pfn, end_pfn);
> + printk(KERN_INFO " node %d low ram: %08lx - %08lx\n",
> + nodeid, start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
> + printk(KERN_INFO " node %d bootmap %08lx - %08lx\n",
> + nodeid, bootmap, bootmap + bootmap_size);
> + free_bootmem_with_active_regions(nodeid, end_pfn);
> + early_res_to_bootmem(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
> +
> + return bootmap + bootmap_size;
> +}
> +#endif
> +
> void __init setup_bootmem_allocator(void)
> {
> - int i;
> + int nodeid;
> unsigned long bootmap_size, bootmap;
> /*
> * Initialize the boot-time allocator (with low memory only):
> @@ -791,18 +819,24 @@ void __init setup_bootmem_allocator(void)
> panic("Cannot find bootmem map of size %ld\n", bootmap_size);
> reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
>
> - /* don't touch min_low_pfn */
> - bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
> - min_low_pfn, max_low_pfn);
> printk(KERN_INFO " mapped low ram: 0 - %08lx\n",
> max_pfn_mapped<<PAGE_SHIFT);
> printk(KERN_INFO " low ram: %08lx - %08lx\n",
> min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);
> +
> +#ifdef CONFIG_NEED_MULTIPLE_NODES
> + for_each_online_node(nodeid)
> + bootmap = setup_node_bootmem(nodeid, node_start_pfn[nodeid],
> + node_end_pfn[nodeid], bootmap);
> +#else
> + /* don't touch min_low_pfn */
> + bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
> + min_low_pfn, max_low_pfn);
> printk(KERN_INFO " bootmap %08lx - %08lx\n",
> bootmap, bootmap + bootmap_size);
> - for_each_online_node(i)
> - free_bootmem_with_active_regions(i, max_low_pfn);
> + free_bootmem_with_active_regions(0, max_low_pfn);
> early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
> +#endif
>
> after_init_bootmem = 1;
> }
> diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
> index 451fe95..3daefa0 100644
> --- a/arch/x86/mm/numa_32.c
> +++ b/arch/x86/mm/numa_32.c
> @@ -416,10 +416,11 @@ void __init initmem_init(unsigned long start_pfn,
> for_each_online_node(nid)
> propagate_e820_map_node(nid);
>
> - for_each_online_node(nid)
> + for_each_online_node(nid) {
> memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
> + NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
> + }
>
> - NODE_DATA(0)->bdata = &bootmem_node_data[0];
> setup_bootmem_allocator();
> }
>
> --
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