Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S939336AbXFHHub (ORCPT ); Fri, 8 Jun 2007 03:50:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S967001AbXFHHZA (ORCPT ); Fri, 8 Jun 2007 03:25:00 -0400 Received: from 216-99-217-87.dsl.aracnet.com ([216.99.217.87]:55311 "EHLO sous-sol.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S938401AbXFHHYz (ORCPT ); Fri, 8 Jun 2007 03:24:55 -0400 Message-Id: <20070608072209.461194000@sous-sol.org> References: <20070608072127.352723000@sous-sol.org> User-Agent: quilt/0.46-1 Date: Fri, 08 Jun 2007 00:21:52 -0700 From: Chris Wright To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: Justin Forbes , Zwane Mwaikambo , "Theodore Ts'o" , Randy Dunlap , Dave Jones , Chuck Wolber , Chris Wedgwood , Michael Krufky , Chuck Ebbert , Domenico Andreoli , torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Zou Nan hai , Suresh Siddha , Andi Kleen , Greg Kroah-Hartman Subject: [patch 25/54] x86_64: allocate sparsemem memmap above 4G Content-Disposition: inline; filename=x86_64-allocate-sparsemem-memmap-above-4g.patch Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2808 Lines: 86 -stable review patch. If anyone has any objections, please let us know. --------------------- From: Zou Nan hai On systems with huge amount of physical memory, VFS cache and memory memmap may eat all available system memory under 4G, then the system may fail to allocate swiotlb bounce buffer. There was a fix for this issue in arch/x86_64/mm/numa.c, but that fix dose not cover sparsemem model. This patch add fix to sparsemem model by first try to allocate memmap above 4G. Signed-off-by: Zou Nan hai Acked-by: Suresh Siddha Cc: Andi Kleen Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds [chrisw: trivial backport] Signed-off-by: Chris Wright Signed-off-by: Greg Kroah-Hartman --- arch/x86_64/mm/init.c | 6 ++++++ include/linux/bootmem.h | 1 + mm/sparse.c | 11 +++++++++++ 3 files changed, 18 insertions(+) --- linux-2.6.21.4.orig/arch/x86_64/mm/init.c +++ linux-2.6.21.4/arch/x86_64/mm/init.c @@ -776,3 +776,9 @@ int in_gate_area_no_task(unsigned long a { return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END); } + +void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size) +{ + return __alloc_bootmem_core(pgdat->bdata, size, + SMP_CACHE_BYTES, (4UL*1024*1024*1024), 0); +} --- linux-2.6.21.4.orig/include/linux/bootmem.h +++ linux-2.6.21.4/include/linux/bootmem.h @@ -59,6 +59,7 @@ extern void *__alloc_bootmem_core(struct unsigned long align, unsigned long goal, unsigned long limit); +extern void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size); #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE extern void reserve_bootmem(unsigned long addr, unsigned long size); --- linux-2.6.21.4.orig/mm/sparse.c +++ linux-2.6.21.4/mm/sparse.c @@ -209,6 +209,12 @@ static int sparse_init_one_section(struc return 1; } +__attribute__((weak)) +void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size) +{ + return NULL; +} + static struct page *sparse_early_mem_map_alloc(unsigned long pnum) { struct page *map; @@ -219,6 +225,11 @@ static struct page *sparse_early_mem_map if (map) return map; + map = alloc_bootmem_high_node(NODE_DATA(nid), + sizeof(struct page) * PAGES_PER_SECTION); + if (map) + return map; + map = alloc_bootmem_node(NODE_DATA(nid), sizeof(struct page) * PAGES_PER_SECTION); if (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/