diff options
Diffstat (limited to 'arch/sparc64/mm/init.c')
| -rw-r--r-- | arch/sparc64/mm/init.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index 40276189c107..cafadcbcdf38 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -938,6 +938,20 @@ static void __init trim_pavail(unsigned long *cur_size_p, } } +/* About pages_avail, this is the value we will use to calculate + * the zholes_size[] argument given to free_area_init_node(). The + * page allocator uses this to calculate nr_kernel_pages, + * nr_all_pages and zone->present_pages. On NUMA it is used + * to calculate zone->min_unmapped_pages and zone->min_slab_pages. + * + * So this number should really be set to what the page allocator + * actually ends up with. This means: + * 1) It should include bootmem map pages, we'll release those. + * 2) It should not include the kernel image, except for the + * __init sections which we will also release. + * 3) It should include the initrd image, since we'll release + * that too. + */ static unsigned long __init bootmem_init(unsigned long *pages_avail, unsigned long phys_base) { @@ -1024,7 +1038,6 @@ static unsigned long __init bootmem_init(unsigned long *pages_avail, initrd_start, initrd_end); #endif reserve_bootmem(initrd_start, size); - *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; initrd_start += PAGE_OFFSET; initrd_end += PAGE_OFFSET; @@ -1037,6 +1050,11 @@ static unsigned long __init bootmem_init(unsigned long *pages_avail, reserve_bootmem(kern_base, kern_size); *pages_avail -= PAGE_ALIGN(kern_size) >> PAGE_SHIFT; + /* Add back in the initmem pages. */ + size = ((unsigned long)(__init_end) & PAGE_MASK) - + PAGE_ALIGN((unsigned long)__init_begin); + *pages_avail += size >> PAGE_SHIFT; + /* Reserve the bootmem map. We do not account for it * in pages_avail because we will release that memory * in free_all_bootmem. @@ -1047,7 +1065,6 @@ static unsigned long __init bootmem_init(unsigned long *pages_avail, (bootmap_pfn << PAGE_SHIFT), size); #endif reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size); - *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; for (i = 0; i < pavail_ents; i++) { unsigned long start_pfn, end_pfn; @@ -1539,6 +1556,10 @@ void __init mem_init(void) #ifdef CONFIG_DEBUG_BOOTMEM prom_printf("mem_init: Calling free_all_bootmem().\n"); #endif + + /* We subtract one to account for the mem_map_zero page + * allocated below. + */ totalram_pages = num_physpages = free_all_bootmem() - 1; /* |