From: Jon Tollefson Date: Tue, 21 Oct 2008 15:27:36 +0000 (+0000) Subject: powerpc: Don't use a 16G page if beyond mem= limits X-Git-Tag: v2.6.28-rc1~58^2~1 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=4792adbac9eb41cea77a45ab76258ea10d411173;p=linux-2.6-omap-h63xx.git powerpc: Don't use a 16G page if beyond mem= limits If mem= is used on the boot command line to limit memory then the memory block where a 16G page resides may not be available. Thanks to Michael Ellerman for finding the problem. Signed-off-by: Jon Tollefson Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 5c64af17475..8d5b4758c13 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -382,8 +382,10 @@ static int __init htab_dt_scan_hugepage_blocks(unsigned long node, printk(KERN_INFO "Huge page(16GB) memory: " "addr = 0x%lX size = 0x%lX pages = %d\n", phys_addr, block_size, expected_pages); - lmb_reserve(phys_addr, block_size * expected_pages); - add_gpage(phys_addr, block_size, expected_pages); + if (phys_addr + (16 * GB) <= lmb_end_of_DRAM()) { + lmb_reserve(phys_addr, block_size * expected_pages); + add_gpage(phys_addr, block_size, expected_pages); + } return 0; } #endif /* CONFIG_HUGETLB_PAGE */