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authorJon Tollefson <kniht@us.ibm.com>2008-10-21 15:27:36 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2008-11-06 19:05:46 -0800
commit6b24a150a44fb93c94799bbb70fedabfe96520fc (patch)
tree6cc2d61613f67cfab95be6856e21e6d0be640923 /arch/powerpc
parent7bdb542c453c14e54af9ebe5c4a827e4a678c47d (diff)
powerpc: Don't use a 16G page if beyond mem= limits
commit 4792adbac9eb41cea77a45ab76258ea10d411173 upstream 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 <kniht@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/mm/hash_utils_64.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 8920eea3452..16319a52323 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -381,8 +381,10 @@ 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;
}