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Date: Mon, 17 Mar 2008 02:58:25 +0100 (CET) From: Andi Kleen <andi@...stfloor.org> To: linux-kernel@...r.kernel.org, pj@....com, linux-mm@...ck.org, nickpiggin@...oo.com.au Subject: [PATCH] [11/18] Fix alignment bug in bootmem allocator Without this fix bootmem can return unaligned addresses when the start of a node is not aligned to the align value. Needed for reliably allocating gigabyte pages. Signed-off-by: Andi Kleen <ak@...e.de> --- mm/bootmem.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) Index: linux/mm/bootmem.c =================================================================== --- linux.orig/mm/bootmem.c +++ linux/mm/bootmem.c @@ -197,6 +197,7 @@ __alloc_bootmem_core(struct bootmem_data { unsigned long offset, remaining_size, areasize, preferred; unsigned long i, start = 0, incr, eidx, end_pfn; + unsigned long pfn; void *ret; if (!size) { @@ -239,12 +240,13 @@ __alloc_bootmem_core(struct bootmem_data preferred = PFN_DOWN(ALIGN(preferred, align)) + offset; areasize = (size + PAGE_SIZE-1) / PAGE_SIZE; incr = align >> PAGE_SHIFT ? : 1; + pfn = PFN_DOWN(bdata->node_boot_start); restart_scan: for (i = preferred; i < eidx; i += incr) { unsigned long j; i = find_next_zero_bit(bdata->node_bootmem_map, eidx, i); - i = ALIGN(i, incr); + i = ALIGN(pfn + i, incr) - pfn; if (i >= eidx) break; if (test_bit(i, bdata->node_bootmem_map)) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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