From 139b830477ccdca21b68c40f9a83ec327e65eb56 Mon Sep 17 00:00:00 2001 From: Bob Picco Date: Tue, 30 Jan 2007 02:11:09 -0800 Subject: [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 Signed-off-by: Bob Picco Acked-by: Simon Horman Signed-off-by: Andrew Morton Signed-off-by: Tony Luck --- arch/ia64/mm/discontig.c | 4 +++- arch/ia64/mm/init.c | 19 +++++++++++++++++-- 2 files changed, 20 insertions(+), 3 deletions(-) (limited to 'arch/ia64/mm') diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c index d3edb12f3cf..999cefd2b22 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 1373fae7657..8b7599808dd 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include @@ -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) -- cgit v1.2.3