The patch titled mm: fix usemap initialization has been added to the -mm tree. Its filename is mm-fix-usemap-initialization.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: mm: fix usemap initialization From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> usemap must be initialized only when pfn is within zone. If not, it corrupts memory. And this patch also reduces the number of calls to set_pageblock_migratetype() from (pfn & (pageblock_nr_pages -1) to !(pfn & (pageblock_nr_pages-1) it should be called once per pageblock. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Acked-by: Mel Gorman <mel@xxxxxxxxx> Cc: Hugh Dickins <hugh@xxxxxxxxxxx> Cc: Shi Weihua <shiwh@xxxxxxxxxxxxxx> Cc: Balbir Singh <balbir@xxxxxxxxxx> Cc: Pavel Emelyanov <xemul@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page_alloc.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff -puN mm/page_alloc.c~mm-fix-usemap-initialization mm/page_alloc.c --- a/mm/page_alloc.c~mm-fix-usemap-initialization +++ a/mm/page_alloc.c @@ -2524,7 +2524,9 @@ void __meminit memmap_init_zone(unsigned struct page *page; unsigned long end_pfn = start_pfn + size; unsigned long pfn; + struct zone *z; + z = &NODE_DATA(nid)->node_zones[zone]; for (pfn = start_pfn; pfn < end_pfn; pfn++) { /* * There can be holes in boot-time mem_map[]s @@ -2542,7 +2544,6 @@ void __meminit memmap_init_zone(unsigned init_page_count(page); reset_page_mapcount(page); SetPageReserved(page); - /* * Mark the block movable so that blocks are reserved for * movable at startup. This will force kernel allocations @@ -2551,8 +2552,15 @@ void __meminit memmap_init_zone(unsigned * kernel allocations are made. Later some blocks near * the start are marked MIGRATE_RESERVE by * setup_zone_migrate_reserve() + * + * bitmap is created for zone's valid pfn range. but memmap + * can be created for invalid pages (for alignment) + * check here not to call set_pageblock_migratetype() against + * pfn out of zone. */ - if ((pfn & (pageblock_nr_pages-1))) + if ((z->zone_start_pfn <= pfn) + && (pfn < z->zone_start_pfn + z->spanned_pages) + && !(pfn & (pageblock_nr_pages - 1))) set_pageblock_migratetype(page, MIGRATE_MOVABLE); INIT_LIST_HEAD(&page->lru); @@ -4464,6 +4472,8 @@ void set_pageblock_flags_group(struct pa pfn = page_to_pfn(page); bitmap = get_pageblock_bitmap(zone, pfn); bitidx = pfn_to_bitidx(zone, pfn); + VM_BUG_ON(pfn < zone->zone_start_pfn); + VM_BUG_ON(pfn >= zone->zone_start_pfn + zone->spanned_pages); for (; start_bitidx <= end_bitidx; start_bitidx++, value <<= 1) if (flags & value) _ Patches currently in -mm which might be from kamezawa.hiroyu@xxxxxxxxxxxxxx are origin.patch disable-the-memory-controller-by-default-v3.patch mm-use-zonelists-instead-of-zones-when-direct-reclaiming-pages.patch mm-introduce-node_zonelist-for-accessing-the-zonelist-for-a-gfp-mask.patch mm-remember-what-the-preferred-zone-is-for-zone_statistics.patch mm-use-two-zonelist-that-are-filtered-by-gfp-mask.patch mm-have-zonelist-contains-structs-with-both-a-zone-pointer-and-zone_idx.patch mm-have-zonelist-contains-structs-with-both-a-zone-pointer-and-zone_idx-fix-memcg-ooms.patch mm-have-zonelist-contains-structs-with-both-a-zone-pointer-and-zone_idx-just-return-do_try_to_free_pages.patch mm-have-zonelist-contains-structs-with-both-a-zone-pointer-and-zone_idx-just-return-do_try_to_free_pages-do_try_to_free_pages-gfp_mask-redundant.patch mm-filter-based-on-a-nodemask-as-well-as-a-gfp_mask.patch mm-filter-based-on-a-nodemask-as-well-as-a-gfp_mask-doc-fixes.patch mm-filter-based-on-a-nodemask-as-well-as-a-gfp_mask-make-dequeue_huge_page_vma-obey-mpol_bind-nodemask.patch mm-filter-based-on-a-nodemask-as-well-as-a-gfp_mask-make-dequeue_huge_page_vma-obey-mpol_bind-nodemask-rework.patch mm-filter-based-on-a-nodemask-as-well-as-a-gfp_mask-deporkify.patch mm-make-early_pfn_to_nid-a-c-function.patch sparsemem-vmemmap-does-not-need-section-bits.patch kbuild-create-a-way-to-create-preprocessor-constants-from-c-expressions.patch pageflags-use-an-enum-for-the-flags.patch pageflags-get-rid-of-flags_reserved.patch pageflags-introduce-macros-to-generate-page-flag-functions.patch pageflags-convert-to-the-use-of-new-macros.patch pageflags-use-proper-page-flag-functions-in-xen.patch pageflags-eliminate-pg_xxx-aliases.patch mm-fix-broken-gfp_zone-with-__gfp_thisnode.patch mm-fix-usemap-initialization.patch memory-hotplug-add-removable-to-sysfs-to-show-memblock-removability.patch cgroup-api-files-rename-read-write_uint-methods-to-read_write_u64.patch cgroup-api-files-add-res_counter_read_u64.patch cgroup-api-files-use-read_u64-in-memory-controller.patch cgroup-api-files-strip-all-trailing-whitespace-in-cgroup_write_u64.patch revert-part-of-sched-cpuset-customize-sched-domains-core.patch cgroup-api-files-update-cpusets-to-use-cgroup-structured-file-api.patch reapply-sched-cpuset-customize-sched-domains-core-bits.patch cgroup-api-files-update-cpusets-to-use-cgroup-structured-file-api-fix.patch cgroup-api-files-add-cgroup-map-data-type.patch cgroup-api-files-use-cgroup-map-for-memcontrol-stats-file.patch cgroup-api-files-drop-mem_cgroup_force_empty.patch cgroup-api-files-move-releasable-to-cgroup_debug-subsystem.patch cgroup-api-files-make-cgroup_debug-default-to-off.patch cgroups-add-the-trigger-callback-to-struct-cftype.patch cgroups-implement-device-whitelist-v6.patch cgroups-implement-device-whitelist-v6-checkpatch-fixes.patch cgroups-implement-device-whitelist-v6-cleanups.patch cgroups-implement-device-whitelist-doc.patch cgroups-implement-device-whitelist-v6-fix.patch cgroups-use-a-hash-table-for-css_set-finding.patch cgroups-simplify-init_subsys.patch cgroups-remove-the-css_set-linked-list.patch cgroups-introduce-cft-read_seq-v2.patch cgroups-add-an-owner-to-the-mm_struct.patch memcgroup-add-the-max_usage-member-on-the-res_counter.patch add-a-document-describing-the-resource-counter-abstraction-v2.patch add-a-document-describing-the-resource-counter-abstraction-v2-fix.patch memcgroup-move-memory-controller-allocations-to-their-own-slabs.patch memcgroup-use-triggers-in-force_empty-and-max_usage-files.patch memcgroup-implement-failcounter-reset.patch memcgroup-implement-failcounter-reset-checkpatch-fixes.patch memcg-remove-redundant-function-calls.patch memcgroup-make-the-memory-controller-more-desktop-responsive.patch use-vmalloc-for-mem_cgroup-allocation-v3.patch use-vmalloc-for-mem_cgroup-allocation-v3-simplification.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html