From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752008AbeEQNAI (ORCPT ); Thu, 17 May 2018 09:00:08 -0400 Received: from mga17.intel.com ([192.55.52.151]:18639 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751396AbeEQNAH (ORCPT ); Thu, 17 May 2018 09:00:07 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,410,1520924400"; d="scan'208";a="42025848" From: Ville Syrjala To: Joonsoo Kim Cc: "Aneesh Kumar K . V" , Tony Lindgren , Vlastimil Babka , Johannes Weiner , Laura Abbott , Marek Szyprowski , Mel Gorman , Michal Hocko , Michal Nazarewicz , Minchan Kim , Rik van Riel , Russell King , Will Deacon , Andrew Morton , Linus Torvalds , linux-mm@kvack.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= Subject: [PATCH] Revert "mm/cma: manage the memory of the CMA area by using the ZONE_MOVABLE" Date: Thu, 17 May 2018 15:59:59 +0300 Message-Id: <20180517125959.8095-1-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.16.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ville Syrjälä This reverts commit bad8c6c0b1144694ecb0bc5629ede9b8b578b86e. Make x86 with HIGHMEM=y and CMA=y boot again. Cc: Joonsoo Kim Cc: Aneesh Kumar K.V Cc: Tony Lindgren Cc: Vlastimil Babka Cc: Johannes Weiner Cc: Laura Abbott Cc: Marek Szyprowski Cc: Mel Gorman Cc: Michal Hocko Cc: Michal Nazarewicz Cc: Minchan Kim Cc: Rik van Riel Cc: Russell King Cc: Will Deacon Cc: Andrew Morton Cc: Linus Torvalds Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Ville Syrjälä --- include/linux/memory_hotplug.h | 3 ++ include/linux/mm.h | 1 - mm/cma.c | 83 ++++++------------------------------------ mm/internal.h | 3 -- mm/page_alloc.c | 55 +++------------------------- 5 files changed, 19 insertions(+), 126 deletions(-) diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index e0e49b5b1ee1..2b0265265c28 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -216,6 +216,9 @@ void put_online_mems(void); void mem_hotplug_begin(void); void mem_hotplug_done(void); +extern void set_zone_contiguous(struct zone *zone); +extern void clear_zone_contiguous(struct zone *zone); + #else /* ! CONFIG_MEMORY_HOTPLUG */ #define pfn_to_online_page(pfn) \ ({ \ diff --git a/include/linux/mm.h b/include/linux/mm.h index 1ac1f06a4be6..f7f1369e9d99 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2109,7 +2109,6 @@ extern void setup_per_cpu_pageset(void); extern void zone_pcp_update(struct zone *zone); extern void zone_pcp_reset(struct zone *zone); -extern void setup_zone_pageset(struct zone *zone); /* page_alloc.c */ extern int min_free_kbytes; diff --git a/mm/cma.c b/mm/cma.c index aa40e6c7b042..5809bbe360d7 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -39,7 +39,6 @@ #include #include "cma.h" -#include "internal.h" struct cma cma_areas[MAX_CMA_AREAS]; unsigned cma_area_count; @@ -110,25 +109,23 @@ static int __init cma_activate_area(struct cma *cma) if (!cma->bitmap) return -ENOMEM; + WARN_ON_ONCE(!pfn_valid(pfn)); + zone = page_zone(pfn_to_page(pfn)); + do { unsigned j; base_pfn = pfn; - if (!pfn_valid(base_pfn)) - goto err; - - zone = page_zone(pfn_to_page(base_pfn)); for (j = pageblock_nr_pages; j; --j, pfn++) { - if (!pfn_valid(pfn)) - goto err; - + WARN_ON_ONCE(!pfn_valid(pfn)); /* - * In init_cma_reserved_pageblock(), present_pages - * is adjusted with assumption that all pages in - * the pageblock come from a single zone. + * alloc_contig_range requires the pfn range + * specified to be in the same zone. Make this + * simple by forcing the entire CMA resv range + * to be in the same zone. */ if (page_zone(pfn_to_page(pfn)) != zone) - goto err; + goto not_in_zone; } init_cma_reserved_pageblock(pfn_to_page(base_pfn)); } while (--i); @@ -142,7 +139,7 @@ static int __init cma_activate_area(struct cma *cma) return 0; -err: +not_in_zone: pr_err("CMA area %s could not be activated\n", cma->name); kfree(cma->bitmap); cma->count = 0; @@ -152,41 +149,6 @@ static int __init cma_activate_area(struct cma *cma) static int __init cma_init_reserved_areas(void) { int i; - struct zone *zone; - pg_data_t *pgdat; - - if (!cma_area_count) - return 0; - - for_each_online_pgdat(pgdat) { - unsigned long start_pfn = UINT_MAX, end_pfn = 0; - - zone = &pgdat->node_zones[ZONE_MOVABLE]; - - /* - * In this case, we cannot adjust the zone range - * since it is now maximum node span and we don't - * know original zone range. - */ - if (populated_zone(zone)) - continue; - - for (i = 0; i < cma_area_count; i++) { - if (pfn_to_nid(cma_areas[i].base_pfn) != - pgdat->node_id) - continue; - - start_pfn = min(start_pfn, cma_areas[i].base_pfn); - end_pfn = max(end_pfn, cma_areas[i].base_pfn + - cma_areas[i].count); - } - - if (!end_pfn) - continue; - - zone->zone_start_pfn = start_pfn; - zone->spanned_pages = end_pfn - start_pfn; - } for (i = 0; i < cma_area_count; i++) { int ret = cma_activate_area(&cma_areas[i]); @@ -195,32 +157,9 @@ static int __init cma_init_reserved_areas(void) return ret; } - /* - * Reserved pages for ZONE_MOVABLE are now activated and - * this would change ZONE_MOVABLE's managed page counter and - * the other zones' present counter. We need to re-calculate - * various zone information that depends on this initialization. - */ - build_all_zonelists(NULL); - for_each_populated_zone(zone) { - if (zone_idx(zone) == ZONE_MOVABLE) { - zone_pcp_reset(zone); - setup_zone_pageset(zone); - } else - zone_pcp_update(zone); - - set_zone_contiguous(zone); - } - - /* - * We need to re-init per zone wmark by calling - * init_per_zone_wmark_min() but doesn't call here because it is - * registered on core_initcall and it will be called later than us. - */ - return 0; } -pure_initcall(cma_init_reserved_areas); +core_initcall(cma_init_reserved_areas); /** * cma_init_reserved_mem() - create custom contiguous area from reserved memory diff --git a/mm/internal.h b/mm/internal.h index 62d8c34e63d5..8679b4fe9e1b 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -168,9 +168,6 @@ extern void post_alloc_hook(struct page *page, unsigned int order, gfp_t gfp_flags); extern int user_min_free_kbytes; -extern void set_zone_contiguous(struct zone *zone); -extern void clear_zone_contiguous(struct zone *zone); - #if defined CONFIG_COMPACTION || defined CONFIG_CMA /* diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 905db9d7962f..3c2f042e9366 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1743,38 +1743,16 @@ void __init page_alloc_init_late(void) } #ifdef CONFIG_CMA -static void __init adjust_present_page_count(struct page *page, long count) -{ - struct zone *zone = page_zone(page); - - /* We don't need to hold a lock since it is boot-up process */ - zone->present_pages += count; -} - /* Free whole pageblock and set its migration type to MIGRATE_CMA. */ void __init init_cma_reserved_pageblock(struct page *page) { unsigned i = pageblock_nr_pages; - unsigned long pfn = page_to_pfn(page); struct page *p = page; - int nid = page_to_nid(page); - - /* - * ZONE_MOVABLE will steal present pages from other zones by - * changing page links so page_zone() is changed. Before that, - * we need to adjust previous zone's page count first. - */ - adjust_present_page_count(page, -pageblock_nr_pages); do { __ClearPageReserved(p); set_page_count(p, 0); - - /* Steal pages from other zones */ - set_page_links(p, ZONE_MOVABLE, nid, pfn); - } while (++p, ++pfn, --i); - - adjust_present_page_count(page, pageblock_nr_pages); + } while (++p, --i); set_pageblock_migratetype(page, MIGRATE_CMA); @@ -6204,7 +6182,6 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat) { enum zone_type j; int nid = pgdat->node_id; - unsigned long node_end_pfn = 0; pgdat_resize_init(pgdat); #ifdef CONFIG_NUMA_BALANCING @@ -6232,13 +6209,9 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat) struct zone *zone = pgdat->node_zones + j; unsigned long size, realsize, freesize, memmap_pages; unsigned long zone_start_pfn = zone->zone_start_pfn; - unsigned long movable_size = 0; size = zone->spanned_pages; realsize = freesize = zone->present_pages; - if (zone_end_pfn(zone) > node_end_pfn) - node_end_pfn = zone_end_pfn(zone); - /* * Adjust freesize so that it accounts for how much memory @@ -6287,30 +6260,12 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat) zone_seqlock_init(zone); zone_pcp_init(zone); - /* - * The size of the CMA area is unknown now so we need to - * prepare the memory for the usemap at maximum. - */ - if (IS_ENABLED(CONFIG_CMA) && j == ZONE_MOVABLE && - pgdat->node_spanned_pages) { - movable_size = node_end_pfn - pgdat->node_start_pfn; - } - - if (!size && !movable_size) + if (!size) continue; set_pageblock_order(); - if (movable_size) { - zone->zone_start_pfn = pgdat->node_start_pfn; - zone->spanned_pages = movable_size; - setup_usemap(pgdat, zone, - pgdat->node_start_pfn, movable_size); - init_currently_empty_zone(zone, - pgdat->node_start_pfn, movable_size); - } else { - setup_usemap(pgdat, zone, zone_start_pfn, size); - init_currently_empty_zone(zone, zone_start_pfn, size); - } + setup_usemap(pgdat, zone, zone_start_pfn, size); + init_currently_empty_zone(zone, zone_start_pfn, size); memmap_init(size, nid, j, zone_start_pfn); } } @@ -7951,7 +7906,7 @@ void free_contig_range(unsigned long pfn, unsigned nr_pages) } #endif -#if defined CONFIG_MEMORY_HOTPLUG || defined CONFIG_CMA +#ifdef CONFIG_MEMORY_HOTPLUG /* * The zone indicated has a new number of managed_pages; batch sizes and percpu * page high values need to be recalulated. -- 2.16.1