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| author | Dave Hansen <haveblue@us.ibm.com> | 2005-06-23 00:07:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-23 09:45:01 -0700 |
| commit | 5b505b90b2d54e526cc8d123bdef3b98c9f0bbc6 (patch) | |
| tree | c56ce2547e654eb0a2166171ba8ca19eaa8cd65f | |
| parent | 348f8b6c4837a07304d2f72b11ce8d96588065e0 (diff) | |
| download | blackbird-op-linux-5b505b90b2d54e526cc8d123bdef3b98c9f0bbc6.tar.gz blackbird-op-linux-5b505b90b2d54e526cc8d123bdef3b98c9f0bbc6.zip | |
[PATCH] sparsemem base: teach discontig about sparse ranges
discontig.c has some assumptions that mem_map[]s inside of a node are
contiguous. Teach it to make sure that each region that it's bringing online
is actually made up of valid ranges of ram.
Written-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/i386/mm/discontig.c | 14 | ||||
| -rw-r--r-- | arch/i386/mm/init.c | 2 | ||||
| -rw-r--r-- | include/asm-i386/page.h | 2 |
3 files changed, 17 insertions, 1 deletions
diff --git a/arch/i386/mm/discontig.c b/arch/i386/mm/discontig.c index dcc71f969b01..088ca4722183 100644 --- a/arch/i386/mm/discontig.c +++ b/arch/i386/mm/discontig.c @@ -216,6 +216,7 @@ static unsigned long calculate_numa_remap_pages(void) { int nid; unsigned long size, reserve_pages = 0; + unsigned long pfn; for_each_online_node(nid) { /* @@ -234,6 +235,19 @@ static unsigned long calculate_numa_remap_pages(void) size = (size + LARGE_PAGE_BYTES - 1) / LARGE_PAGE_BYTES; /* now the roundup is correct, convert to PAGE_SIZE pages */ size = size * PTRS_PER_PTE; + + /* + * Validate the region we are allocating only contains valid + * pages. + */ + for (pfn = node_end_pfn[nid] - size; + pfn < node_end_pfn[nid]; pfn++) + if (!page_is_ram(pfn)) + break; + + if (pfn != node_end_pfn[nid]) + size = 0; + printk("Reserving %ld pages of KVA for lmem_map of node %d\n", size, nid); node_remap_size[nid] = size; diff --git a/arch/i386/mm/init.c b/arch/i386/mm/init.c index 8766c771bb45..666ca79fb50a 100644 --- a/arch/i386/mm/init.c +++ b/arch/i386/mm/init.c @@ -191,7 +191,7 @@ static inline int page_kills_ppro(unsigned long pagenr) extern int is_available_memory(efi_memory_desc_t *); -static inline int page_is_ram(unsigned long pagenr) +int page_is_ram(unsigned long pagenr) { int i; unsigned long addr, end; diff --git a/include/asm-i386/page.h b/include/asm-i386/page.h index 41400d342d44..8f3dded01bff 100644 --- a/include/asm-i386/page.h +++ b/include/asm-i386/page.h @@ -120,6 +120,8 @@ static __inline__ int get_order(unsigned long size) extern int sysctl_legacy_va_layout; +extern int page_is_ram(unsigned long pagenr); + #endif /* __ASSEMBLY__ */ #ifdef __ASSEMBLY__ |
