Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753959Ab0GIWMP (ORCPT ); Fri, 9 Jul 2010 18:12:15 -0400 Received: from rcsinet10.oracle.com ([148.87.113.121]:34265 "EHLO rcsinet10.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752449Ab0GIWMN (ORCPT ); Fri, 9 Jul 2010 18:12:13 -0400 Message-ID: <4C379DB6.3040605@kernel.org> Date: Fri, 09 Jul 2010 15:07:50 -0700 From: Yinghai Lu User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.10) Gecko/20100520 SUSE/3.0.5 Thunderbird/3.0.5 MIME-Version: 1.0 To: Conny Seidel CC: "Petkov, Borislav" , Ingo Molnar , "H. Peter Anvin" , Andrew Morton , LKML Subject: Re: unable to handle kernel paging request at 40000000 __alloc_memory_core_early+0x147/0x1d6 References: <20100709145415.GC11199@aftab> <4C3773C4.1010609@kernel.org> <20100709215202.4be679a8@marah.osrc.amd.com> <4C37841F.4030500@kernel.org> <20100709224231.5736113b@marah.osrc.amd.com> In-Reply-To: <20100709224231.5736113b@marah.osrc.amd.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Source-IP: acsmt354.oracle.com [141.146.40.154] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A090203.4C379EA7.00B4,ss=1,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3683 Lines: 94 On 07/09/2010 01:42 PM, Conny Seidel wrote: > sparse_early_mem_map_alloc: sparsemem memory map backing failed some memory will not be available. please check [PATCH -v2] x86,mm: fix 32bit numa sparsemem Borislav Petkov reported his 32bit numa has problem: [ 0.000000] Reserving total of 4c00 pages for numa KVA remap [ 0.000000] kva_start_pfn ~ 32800 max_low_pfn ~ 375fe [ 0.000000] max_pfn = 238000 [ 0.000000] 8202MB HIGHMEM available. [ 0.000000] 885MB LOWMEM available. [ 0.000000] mapped low ram: 0 - 375fe000 [ 0.000000] low ram: 0 - 375fe000 [ 0.000000] alloc (nid=8 100000 - 7ee00000) (1000000 - ffffffff) 1000 1000 => 34e7000 [ 0.000000] alloc (nid=8 100000 - 7ee00000) (1000000 - ffffffff) 200 40 => 34c9d80 [ 0.000000] alloc (nid=0 100000 - 7ee00000) (1000000 - ffffffffffffffff) 180 40 => 34e6140 [ 0.000000] alloc (nid=1 80000000 - c7e60000) (1000000 - ffffffffffffffff) 240 40 => 80000000 [ 0.000000] BUG: unable to handle kernel paging request at 40000000 [ 0.000000] IP: [] __alloc_memory_core_early+0x147/0x1d6 [ 0.000000] *pdpt = 0000000000000000 *pde = f000ff53f000ff00 ... [ 0.000000] Call Trace: [ 0.000000] [] ? __alloc_bootmem_node+0x216/0x22f [ 0.000000] [] ? sparse_early_usemaps_alloc_node+0x5a/0x10b [ 0.000000] [] ? sparse_init+0x1dc/0x499 [ 0.000000] [] ? paging_init+0x168/0x1df [ 0.000000] [] ? native_pagetable_setup_start+0xef/0x1bb looks like it allocate much high address for bootmem. try to cut limit with get_max_mapped() -v2: add fallback for sparse_mem_map_populate() for "sparse_early_mem_map_alloc: sparsemem memory map backing failed some memory will not be available." Reported-by: Borislav Petkov Signed-off-by: Yinghai Lu --- mm/page_alloc.c | 3 +++ mm/sparse.c | 10 +++++++++- 2 files changed, 12 insertions(+), 1 deletion(-) Index: linux-2.6/mm/page_alloc.c =================================================================== --- linux-2.6.orig/mm/page_alloc.c +++ linux-2.6/mm/page_alloc.c @@ -3634,6 +3634,9 @@ void * __init __alloc_memory_core_early( int i; void *ptr; + if (limit > get_max_mapped()) + limit = get_max_mapped(); + /* need to go over early_node_map to find out good range for node */ for_each_active_range_index_in_nid(i, nid) { u64 addr; Index: linux-2.6/mm/sparse.c =================================================================== --- linux-2.6.orig/mm/sparse.c +++ linux-2.6/mm/sparse.c @@ -363,7 +363,10 @@ static void __init sparse_early_usemaps_ return; } - usemap = alloc_bootmem_node(NODE_DATA(nodeid), size * usemap_count); + usemap = __alloc_bootmem_node_nopanic(NODE_DATA(nodeid), + size * usemap_count, + SMP_CACHE_BYTES, + __pa(MAX_DMA_ADDRESS)); if (usemap) { for (pnum = pnum_begin; pnum < pnum_end; pnum++) { if (!present_section_nr(pnum)) @@ -391,6 +394,11 @@ struct page __init *sparse_mem_map_popul size = PAGE_ALIGN(sizeof(struct page) * PAGES_PER_SECTION); map = __alloc_bootmem_node_high(NODE_DATA(nid), size, PAGE_SIZE, __pa(MAX_DMA_ADDRESS)); + + if (!map) + map = __alloc_bootmem_node_nopanic(NODE_DATA(nid), size, + PAGE_SIZE, __pa(MAX_DMA_ADDRESS)); + return map; } void __init sparse_mem_maps_populate_node(struct page **map_map, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/