diff options
author | Bob Picco <bob.picco@hp.com> | 2007-01-30 10:11:09 (GMT) |
---|---|---|
committer | Tony Luck <tony.luck@intel.com> | 2007-02-05 23:07:47 (GMT) |
commit | 139b830477ccdca21b68c40f9a83ec327e65eb56 (patch) | |
tree | 0aab2140315579525dfef89189b9bea5033af2ba | |
parent | d1598e05faa11d9f04e0a226122dd57674fb1dab (diff) | |
download | linux-fsl-qoriq-139b830477ccdca21b68c40f9a83ec327e65eb56.tar.xz |
[IA64] register memory ranges in a consistent manner
While pursuing and unrelated issue with 64Mb granules I noticed a problem
related to inconsistent use of add_active_range. There doesn't appear any
reason to me why FLATMEM versus DISCONTIG_MEM should register memory to
add_active_range with different code. So I've changed the code into a
common implementation.
The other subtle issue fixed by this patch was calling add_active_range in
count_node_pages before granule aligning is performed. We were lucky with
16MB granules but not so with 64MB granules. count_node_pages has reserved
regions filtered out and as a consequence linked kernel text and data
aren't covered by calls to count_node_pages. So linked kernel regions
wasn't reported to add_active_regions. This resulted in free_initmem
causing numerous bad_page reports. This won't occur with this patch
because now all known memory regions are reported by
register_active_ranges.
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Bob Picco <bob.picco@hp.com>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
-rw-r--r-- | arch/ia64/mm/discontig.c | 4 | ||||
-rw-r--r-- | arch/ia64/mm/init.c | 19 | ||||
-rw-r--r-- | include/asm-ia64/meminit.h | 3 |
3 files changed, 22 insertions, 4 deletions
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c index d3edb12..999cefd 100644 --- a/arch/ia64/mm/discontig.c +++ b/arch/ia64/mm/discontig.c @@ -473,6 +473,9 @@ void __init find_memory(void) node_clear(node, memory_less_mask); mem_data[node].min_pfn = ~0UL; } + + efi_memmap_walk(register_active_ranges, NULL); + /* * Initialize the boot memory maps in reverse order since that's * what the bootmem allocator expects @@ -660,7 +663,6 @@ static __init int count_node_pages(unsigned long start, unsigned long len, int n { unsigned long end = start + len; - add_active_range(node, start >> PAGE_SHIFT, end >> PAGE_SHIFT); mem_data[node].num_physpages += len >> PAGE_SHIFT; if (start <= __pa(MAX_DMA_ADDRESS)) mem_data[node].num_dma_physpages += diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index 1373fae..8b75998 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -19,6 +19,7 @@ #include <linux/swap.h> #include <linux/proc_fs.h> #include <linux/bitops.h> +#include <linux/kexec.h> #include <asm/a.out.h> #include <asm/dma.h> @@ -595,13 +596,27 @@ find_largest_hole (u64 start, u64 end, void *arg) return 0; } +#endif /* CONFIG_VIRTUAL_MEM_MAP */ + int __init register_active_ranges(u64 start, u64 end, void *arg) { - add_active_range(0, __pa(start) >> PAGE_SHIFT, __pa(end) >> PAGE_SHIFT); + int nid = paddr_to_nid(__pa(start)); + + if (nid < 0) + nid = 0; +#ifdef CONFIG_KEXEC + if (start > crashk_res.start && start < crashk_res.end) + start = crashk_res.end; + if (end > crashk_res.start && end < crashk_res.end) + end = crashk_res.start; +#endif + + if (start < end) + add_active_range(nid, __pa(start) >> PAGE_SHIFT, + __pa(end) >> PAGE_SHIFT); return 0; } -#endif /* CONFIG_VIRTUAL_MEM_MAP */ static int __init count_reserved_pages (u64 start, u64 end, void *arg) diff --git a/include/asm-ia64/meminit.h b/include/asm-ia64/meminit.h index c8df759..6dd476b 100644 --- a/include/asm-ia64/meminit.h +++ b/include/asm-ia64/meminit.h @@ -51,12 +51,13 @@ extern void efi_memmap_init(unsigned long *, unsigned long *); #define IGNORE_PFN0 1 /* XXX fix me: ignore pfn 0 until TLB miss handler is updated... */ +extern int register_active_ranges(u64 start, u64 end, void *arg); + #ifdef CONFIG_VIRTUAL_MEM_MAP # define LARGE_GAP 0x40000000 /* Use virtual mem map if hole is > than this */ extern unsigned long vmalloc_end; extern struct page *vmem_map; extern int find_largest_hole (u64 start, u64 end, void *arg); - extern int register_active_ranges (u64 start, u64 end, void *arg); extern int create_mem_map_page_table (u64 start, u64 end, void *arg); extern int vmemmap_find_next_valid_pfn(int, int); #else |