From: Andrew Morton <akpm@linux-foundation.org>
To: anshuman.khandual@arm.com, david@redhat.com, mhocko@suse.com,
mm-commits@vger.kernel.org, richard.weiyang@gmail.com,
rientjes@google.com
Subject: + mm-page_allocc-bad_flags-is-not-necessary-for-bad_page.patch added to -mm tree
Date: Mon, 13 Apr 2020 17:40:30 -0700 [thread overview]
Message-ID: <20200414004030.Qj7ejq7OB%akpm@linux-foundation.org> (raw)
In-Reply-To: <20200412004155.1a8f4e081b4e03ef5903abb5@linux-foundation.org>
The patch titled
Subject: mm/page_alloc.c: bad_flags is not necessary for bad_page()
has been added to the -mm tree. Its filename is
mm-page_allocc-bad_flags-is-not-necessary-for-bad_page.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-page_allocc-bad_flags-is-not-necessary-for-bad_page.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-page_allocc-bad_flags-is-not-necessary-for-bad_page.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Wei Yang <richard.weiyang@gmail.com>
Subject: mm/page_alloc.c: bad_flags is not necessary for bad_page()
After commit 5b57b8f22709 ("mm/debug.c: always print flags in
dump_page()"), page->flags is always printed for a bad page. It is not
necessary to have bad_flags any more.
Link: http://lkml.kernel.org/r/20200411220357.9636-3-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Suggested-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/page_alloc.c | 34 ++++++++++------------------------
1 file changed, 10 insertions(+), 24 deletions(-)
--- a/mm/page_alloc.c~mm-page_allocc-bad_flags-is-not-necessary-for-bad_page
+++ a/mm/page_alloc.c
@@ -607,8 +607,7 @@ static inline int __maybe_unused bad_ran
}
#endif
-static void bad_page(struct page *page, const char *reason,
- unsigned long bad_flags)
+static void bad_page(struct page *page, const char *reason)
{
static unsigned long resume;
static unsigned long nr_shown;
@@ -637,10 +636,6 @@ static void bad_page(struct page *page,
pr_alert("BUG: Bad page state in process %s pfn:%05lx\n",
current->comm, page_to_pfn(page));
__dump_page(page, reason);
- bad_flags &= page->flags;
- if (bad_flags)
- pr_alert("bad because of flags: %#lx(%pGp)\n",
- bad_flags, &bad_flags);
dump_page_owner(page);
print_modules();
@@ -1077,11 +1072,7 @@ static inline bool page_expected_state(s
static void free_pages_check_bad(struct page *page)
{
- const char *bad_reason;
- unsigned long bad_flags;
-
- bad_reason = NULL;
- bad_flags = 0;
+ const char *bad_reason = NULL;
if (unlikely(atomic_read(&page->_mapcount) != -1))
bad_reason = "nonzero mapcount";
@@ -1089,15 +1080,13 @@ static void free_pages_check_bad(struct
bad_reason = "non-NULL mapping";
if (unlikely(page_ref_count(page) != 0))
bad_reason = "nonzero _refcount";
- if (unlikely(page->flags & PAGE_FLAGS_CHECK_AT_FREE)) {
+ if (unlikely(page->flags & PAGE_FLAGS_CHECK_AT_FREE))
bad_reason = "PAGE_FLAGS_CHECK_AT_FREE flag(s) set";
- bad_flags = PAGE_FLAGS_CHECK_AT_FREE;
- }
#ifdef CONFIG_MEMCG
if (unlikely(page->mem_cgroup))
bad_reason = "page still charged to cgroup";
#endif
- bad_page(page, bad_reason, bad_flags);
+ bad_page(page, bad_reason);
}
static inline int free_pages_check(struct page *page)
@@ -1128,7 +1117,7 @@ static int free_tail_pages_check(struct
case 1:
/* the first tail page: ->mapping may be compound_mapcount() */
if (unlikely(compound_mapcount(page))) {
- bad_page(page, "nonzero compound_mapcount", 0);
+ bad_page(page, "nonzero compound_mapcount");
goto out;
}
break;
@@ -1140,17 +1129,17 @@ static int free_tail_pages_check(struct
break;
default:
if (page->mapping != TAIL_MAPPING) {
- bad_page(page, "corrupted mapping in tail page", 0);
+ bad_page(page, "corrupted mapping in tail page");
goto out;
}
break;
}
if (unlikely(!PageTail(page))) {
- bad_page(page, "PageTail not set", 0);
+ bad_page(page, "PageTail not set");
goto out;
}
if (unlikely(compound_head(page) != head_page)) {
- bad_page(page, "compound_head not consistent", 0);
+ bad_page(page, "compound_head not consistent");
goto out;
}
ret = 0;
@@ -2094,7 +2083,6 @@ static inline void expand(struct zone *z
static void check_new_page_bad(struct page *page)
{
const char *bad_reason = NULL;
- unsigned long bad_flags = 0;
if (unlikely(page->flags & __PG_HWPOISON)) {
/* Don't complain about hwpoisoned pages */
@@ -2107,15 +2095,13 @@ static void check_new_page_bad(struct pa
bad_reason = "non-NULL mapping";
if (unlikely(page_ref_count(page) != 0))
bad_reason = "nonzero _refcount";
- if (unlikely(page->flags & PAGE_FLAGS_CHECK_AT_PREP)) {
+ if (unlikely(page->flags & PAGE_FLAGS_CHECK_AT_PREP))
bad_reason = "PAGE_FLAGS_CHECK_AT_PREP flag set";
- bad_flags = PAGE_FLAGS_CHECK_AT_PREP;
- }
#ifdef CONFIG_MEMCG
if (unlikely(page->mem_cgroup))
bad_reason = "page still charged to cgroup";
#endif
- bad_page(page, bad_reason, bad_flags);
+ bad_page(page, bad_reason);
}
/*
_
Patches currently in -mm which might be from richard.weiyang@gmail.com are
mm-page_allocc-bad_-is-not-necessary-when-pagehwpoison.patch
mm-page_allocc-bad_flags-is-not-necessary-for-bad_page.patch
mm-page_allocc-rename-free_pages_check_bad-to-check_free_page_bad.patch
mm-page_allocc-rename-free_pages_check-to-check_free_page.patch
mm-page_allocc-extract-check__page_bad-common-part-to-page_bad_reason.patch
next prev parent reply other threads:[~2020-04-14 0:40 UTC|newest]
Thread overview: 144+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-12 7:41 incoming Andrew Morton
2020-04-12 7:42 ` [patch 1/1] mm/debug: add tests validating architecture page table helpers Andrew Morton
2020-04-12 16:33 ` Linus Torvalds
2020-04-13 2:13 ` Anshuman Khandual
2020-04-13 20:01 ` + mm-userfaultfd-disable-userfaultfd-wp-on-x86_32.patch added to -mm tree Andrew Morton
2020-04-13 20:08 ` + maintainers-add-an-entry-for-kfifo-fix.patch " Andrew Morton
2020-04-13 20:11 ` + m68k-drop-redundant-generic-y-=-hardirqh.patch " Andrew Morton
2020-04-13 20:12 ` + userc-make-uidhash_table-static.patch " Andrew Morton
2020-04-13 20:34 ` + sh-fix-build-error-in-mm-initc.patch " Andrew Morton
2020-04-13 20:51 ` + mm-hugetlb-fix-a-addressing-exception-caused-by-huge_pte_offset.patch " Andrew Morton
2020-04-13 21:16 ` + checkpatch-additional-maintainer-section-entry-ordering-checks.patch " Andrew Morton
2020-04-13 22:27 ` + fat-improve-the-readahead-for-fat-entries.patch " Andrew Morton
2020-04-13 22:32 ` + mm-swapfile-use-list_prevnext_entry-instead-of-open-coding.patch " Andrew Morton
2020-04-13 22:33 ` + mm-replace-zero-length-array-with-flexible-array-member.patch " Andrew Morton
2020-04-13 22:36 ` + mm-vmsan-fix-some-typos-in-comment.patch " Andrew Morton
2020-04-13 22:38 ` + mm-compaction-fix-a-typo-in-comment-pessemistic-pessimistic.patch " Andrew Morton
2020-04-13 22:38 ` + mm-memblock-fix-a-typo-in-comment-implict-implicit.patch " Andrew Morton
2020-04-13 22:38 ` + mm-list_lru-fix-a-typo-in-comment-numbesr-numbers.patch " Andrew Morton
2020-04-13 22:50 ` + mm-filemap-fix-a-typo-in-comment-unneccssary-unnecessary.patch " Andrew Morton
2020-04-13 22:51 ` + mm-frontswap-fix-some-typos-in-frontswapc.patch " Andrew Morton
2020-04-13 22:51 ` + mm-memcg-fix-some-typos-in-memcontrolc.patch " Andrew Morton
2020-04-13 22:51 ` + mm-fix-a-typo-in-comment-strucure-structure.patch " Andrew Morton
2020-04-13 23:07 ` + mm-slub-fix-a-typo-in-comment-disambiguiation-disambiguation.patch " Andrew Morton
2020-04-13 23:07 ` + mm-sparse-fix-a-typo-in-comment-convienence-convenience.patch " Andrew Morton
2020-04-13 23:07 ` + mm-page-writeback-fix-a-typo-in-comment-effictive-effective.patch " Andrew Morton
2020-04-13 23:07 ` + mm-memory-fix-a-typo-in-comment-attampt-attempt.patch " Andrew Morton
2020-04-14 0:25 ` + mm-memblock-replace-dereferences-of-memblock_regionnid-with-api-calls.patch " Andrew Morton
2020-04-14 0:25 ` + mm-make-early_pfn_to_nid-and-related-defintions-close-to-each-other.patch " Andrew Morton
2020-04-14 0:25 ` + mm-remove-config_have_memblock_node_map-option.patch " Andrew Morton
2020-04-14 0:25 ` + mm-free_area_init-use-maximal-zone-pfns-rather-than-zone-sizes.patch " Andrew Morton
2020-04-14 0:25 ` + mm-use-free_area_init-instead-of-free_area_init_nodes.patch " Andrew Morton
2020-04-14 0:26 ` + alpha-simplify-detection-of-memory-zone-boundaries.patch " Andrew Morton
2020-04-14 0:26 ` + arm-simplify-detection-of-memory-zone-boundaries.patch " Andrew Morton
2020-04-14 0:26 ` + arm64-simplify-detection-of-memory-zone-boundaries-for-uma-configs.patch " Andrew Morton
2020-04-14 0:26 ` + csky-simplify-detection-of-memory-zone-boundaries.patch " Andrew Morton
2020-04-14 0:26 ` + m68k-mm-simplify-detection-of-memory-zone-boundaries.patch " Andrew Morton
2020-04-14 0:26 ` + parisc-simplify-detection-of-memory-zone-boundaries.patch " Andrew Morton
2020-04-14 0:26 ` + sparc32-simplify-detection-of-memory-zone-boundaries.patch " Andrew Morton
2020-04-14 0:26 ` + unicore32-simplify-detection-of-memory-zone-boundaries.patch " Andrew Morton
2020-04-14 0:26 ` + xtensa-simplify-detection-of-memory-zone-boundaries.patch " Andrew Morton
2020-04-14 0:26 ` + mm-memmap_init-iterate-over-memblock-regions-rather-that-check-each-pfn.patch " Andrew Morton
2020-04-14 0:26 ` + mm-remove-early_pfn_in_nid-and-config_nodes_span_other_nodes.patch " Andrew Morton
2020-04-14 0:26 ` + mm-free_area_init-allow-defining-max_zone_pfn-in-descending-order.patch " Andrew Morton
2020-04-14 0:26 ` + mm-rename-free_area_init_node-to-free_area_init_memoryless_node.patch " Andrew Morton
2020-04-14 0:26 ` + mm-clean-up-free_area_init_node-and-its-helpers.patch " Andrew Morton
2020-04-14 0:26 ` + mm-simplify-find_min_pfn_with_active_regions.patch " Andrew Morton
2020-04-14 0:27 ` + docs-vm-update-memory-models-documentation.patch " Andrew Morton
2020-04-14 0:40 ` + mm-page_allocc-bad_-is-not-necessary-when-pagehwpoison.patch " Andrew Morton
2020-04-14 0:40 ` Andrew Morton [this message]
2020-04-14 0:40 ` + mm-page_allocc-rename-free_pages_check_bad-to-check_free_page_bad.patch " Andrew Morton
2020-04-14 0:40 ` + mm-page_allocc-rename-free_pages_check-to-check_free_page.patch " Andrew Morton
2020-04-14 0:40 ` + mm-page_allocc-extract-check__page_bad-common-part-to-page_bad_reason.patch " Andrew Morton
2020-04-14 0:52 ` + dynamic_debug-add-an-option-to-enable-dynamic-debug-for-modules-only.patch " Andrew Morton
2020-04-14 1:09 ` + mm-gup-return-eintr-when-gup-is-interrupted-by-fatal-signals.patch " Andrew Morton
2020-04-14 1:37 ` + squashfs-squashfs_fsh-replace-zero-length-array-with-flexible-array-member.patch " Andrew Morton
2020-04-14 1:37 ` + squashfs-migrate-from-ll_rw_block-usage-to-bio.patch " Andrew Morton
2020-04-14 1:39 ` + checkpatch-fix-a-typo-in-the-regex-for-allocfunctions.patch " Andrew Morton
2020-04-14 2:06 ` + powerpc-pseries-hotplug-memory-stop-checking-is_mem_section_removable.patch " Andrew Morton
2020-04-14 2:06 ` + mm-memory_hotplug-remove-is_mem_section_removable.patch " Andrew Morton
2020-04-14 2:13 ` [folded-merged] mm-clarify-__gfp_memalloc-usage-update.patch removed from " Andrew Morton
2020-04-14 2:13 ` [folded-merged] mm-clarify-__gfp_memalloc-usage-update-checkpatch-fixes.patch " Andrew Morton
2020-04-14 22:30 ` + maintainers-add-an-entry-for-kfifo-fix-fix.patch added to " Andrew Morton
2020-04-14 23:10 ` + mm-hugetlb-fix-a-typo-in-comment-manitained-maintained-v2.patch " Andrew Morton
2020-04-14 23:11 ` + mm-hugetlb-fix-a-typo-in-comment-manitained-maintained-v2-checkpatch-fixes.patch " Andrew Morton
2020-04-14 23:11 ` + mm-ksm-fix-a-typo-in-comment-alreaady-already-v2.patch " Andrew Morton
2020-04-14 23:56 ` + lib-add-might_fault-to-strncpy_from_user.patch " Andrew Morton
2020-04-15 0:00 ` + tools-build-tweak-unused-value-workaround.patch " Andrew Morton
2020-04-15 0:39 ` + h8300-remove-usage-of-__arch_use_5level_hack.patch " Andrew Morton
2020-04-15 0:39 ` + arm-add-support-for-folded-p4d-page-tables.patch " Andrew Morton
2020-04-15 0:39 ` + arm64-add-support-for-folded-p4d-page-tables.patch " Andrew Morton
2020-04-15 0:39 ` + hexagon-remove-__arch_use_5level_hack.patch " Andrew Morton
2020-04-15 0:39 ` + ia64-add-support-for-folded-p4d-page-tables.patch " Andrew Morton
2020-04-15 0:39 ` + nios2-add-support-for-folded-p4d-page-tables.patch " Andrew Morton
2020-04-15 0:40 ` + openrisc-add-support-for-folded-p4d-page-tables.patch " Andrew Morton
2020-04-15 0:40 ` + powerpc-add-support-for-folded-p4d-page-tables.patch " Andrew Morton
2020-04-15 0:40 ` + sh-fault-modernize-printing-of-kernel-messages.patch " Andrew Morton
2020-04-15 0:40 ` + sh-drop-__pxd_offset-macros-that-duplicate-pxd_index-ones.patch " Andrew Morton
2020-04-15 0:40 ` + sh-add-support-for-folded-p4d-page-tables.patch " Andrew Morton
2020-04-15 0:40 ` + unicore32-remove-__arch_use_5level_hack.patch " Andrew Morton
2020-04-15 0:40 ` + asm-generic-remove-pgtable-nop4d-hackh.patch " Andrew Morton
2020-04-15 0:40 ` + mm-remove-__arch_has_5level_hack-and-include-asm-generic-5level-fixuph.patch " Andrew Morton
2020-04-15 1:17 ` + mm-move-readahead-prototypes-from-mmh.patch " Andrew Morton
2020-04-15 1:17 ` + mm-return-void-from-various-readahead-functions.patch " Andrew Morton
2020-04-15 1:17 ` + mm-ignore-return-value-of-readpages.patch " Andrew Morton
2020-04-15 1:17 ` + mm-move-readahead-nr_pages-check-into-read_pages.patch " Andrew Morton
2020-04-15 1:17 ` + mm-add-new-readahead_control-api.patch " Andrew Morton
2020-04-15 1:17 ` + mm-use-readahead_control-to-pass-arguments.patch " Andrew Morton
2020-04-15 1:17 ` + mm-rename-various-offset-parameters-to-index.patch " Andrew Morton
2020-04-15 1:17 ` + mm-rename-readahead-loop-variable-to-i.patch " Andrew Morton
2020-04-15 1:17 ` + mm-remove-page_offset-from-readahead-loop.patch " Andrew Morton
2020-04-15 1:17 ` + mm-put-readahead-pages-in-cache-earlier.patch " Andrew Morton
2020-04-15 1:17 ` + mm-add-readahead-address-space-operation.patch " Andrew Morton
2020-04-15 1:17 ` + mm-move-end_index-check-out-of-readahead-loop.patch " Andrew Morton
2020-04-15 1:18 ` + mm-add-page_cache_readahead_unbounded.patch " Andrew Morton
2020-04-15 1:18 ` + mm-document-why-we-dont-set-pagereadahead.patch " Andrew Morton
2020-04-15 1:18 ` + mm-use-memalloc_nofs_save-in-readahead-path.patch " Andrew Morton
2020-04-15 1:18 ` + fs-convert-mpage_readpages-to-mpage_readahead.patch " Andrew Morton
2020-04-15 1:18 ` + btrfs-convert-from-readpages-to-readahead.patch " Andrew Morton
2020-04-15 1:18 ` + erofs-convert-uncompressed-files-from-readpages-to-readahead.patch " Andrew Morton
2020-04-15 1:18 ` + erofs-convert-compressed-files-from-readpages-to-readahead.patch " Andrew Morton
2020-04-15 1:18 ` + ext4-convert-from-readpages-to-readahead.patch " Andrew Morton
2020-04-15 1:18 ` + ext4-pass-the-inode-to-ext4_mpage_readpages.patch " Andrew Morton
2020-04-15 1:18 ` + f2fs-convert-from-readpages-to-readahead.patch " Andrew Morton
2020-04-15 1:18 ` + f2fs-pass-the-inode-to-f2fs_mpage_readpages.patch " Andrew Morton
2020-04-15 1:18 ` + fuse-convert-from-readpages-to-readahead.patch " Andrew Morton
2020-04-15 1:18 ` + iomap-convert-from-readpages-to-readahead.patch " Andrew Morton
2020-04-15 1:54 ` + mm-ksm-fix-null-pointer-dereference-when-ksm-zero-page-is-enabled.patch " Andrew Morton
2020-04-15 7:44 ` Kirill Tkhai
2020-04-15 8:16 ` [External] " Muchun Song
2020-04-15 18:32 ` Andrew Morton
2020-04-15 4:29 ` + mm-gupc-further-document-vma_permits_fault.patch " Andrew Morton
2020-04-15 4:33 ` + fuse-convert-from-readpages-to-readahead-fix.patch " Andrew Morton
2020-04-15 4:46 ` + x86-hyperv-use-vmalloc_exec-for-the-hypercall-page.patch " Andrew Morton
2020-04-15 4:46 ` + x86-fix-vmap-arguments-in-map_irq_stack.patch " Andrew Morton
2020-04-15 4:46 ` + staging-android-ion-use-vmap-instead-of-vm_map_ram.patch " Andrew Morton
2020-04-15 4:46 ` + staging-media-ipu3-use-vmap-instead-of-reimplementing-it.patch " Andrew Morton
2020-04-15 4:46 ` + dma-mapping-use-vmap-insted-of-reimplementing-it.patch " Andrew Morton
2020-04-15 4:46 ` + powerpc-add-an-ioremap_phb-helper.patch " Andrew Morton
2020-04-15 4:46 ` + powerpc-remove-__ioremap_at-and-__iounmap_at.patch " Andrew Morton
2020-04-15 4:47 ` + mm-remove-__get_vm_area.patch " Andrew Morton
2020-04-15 4:47 ` + mm-unexport-unmap_kernel_range_noflush.patch " Andrew Morton
2020-04-15 4:47 ` + mm-rename-config_pgtable_mapping-to-config_zsmalloc_pgtable_mapping.patch " Andrew Morton
2020-04-15 4:47 ` + mm-only-allow-page-table-mappings-for-built-in-zsmalloc.patch " Andrew Morton
2020-04-15 4:47 ` + mm-pass-addr-as-unsigned-long-to-vb_free.patch " Andrew Morton
2020-04-15 4:47 ` + mm-remove-vmap_page_range_noflush-and-vunmap_page_range.patch " Andrew Morton
2020-04-15 4:47 ` + mm-rename-vmap_page_range-to-map_kernel_range.patch " Andrew Morton
2020-04-15 4:47 ` + mm-dont-return-the-number-of-pages-from-map_kernel_range_noflush.patch " Andrew Morton
2020-04-15 4:47 ` + mm-remove-map_vm_range.patch " Andrew Morton
2020-04-15 4:47 ` + mm-remove-unmap_vmap_area.patch " Andrew Morton
2020-04-15 4:47 ` + mm-remove-the-prot-argument-from-vm_map_ram.patch " Andrew Morton
2020-04-15 4:47 ` + mm-enforce-that-vmap-cant-map-pages-executable.patch " Andrew Morton
2020-04-15 4:47 ` + gpu-drm-remove-the-powerpc-hack-in-drm_legacy_sg_alloc.patch " Andrew Morton
2020-04-15 4:47 ` + mm-remove-the-pgprot-argument-to-__vmalloc.patch " Andrew Morton
2020-04-15 4:48 ` + mm-remove-the-prot-argument-to-__vmalloc_node.patch " Andrew Morton
2020-04-15 4:48 ` + mm-remove-both-instances-of-__vmalloc_node_flags.patch " Andrew Morton
2020-04-15 4:48 ` + mm-remove-__vmalloc_node_flags_caller.patch " Andrew Morton
2020-04-15 4:48 ` + mm-switch-the-test_vmalloc-module-to-use-__vmalloc_node.patch " Andrew Morton
2020-04-15 4:48 ` + mm-remove-vmalloc_user_node_flags.patch " Andrew Morton
2020-04-15 4:48 ` + arm64-use-__vmalloc_node-in-arch_alloc_vmap_stack.patch " Andrew Morton
2020-04-15 4:48 ` + powerpc-use-__vmalloc_node-in-alloc_vm_stack.patch " Andrew Morton
2020-04-15 4:48 ` + s390-use-__vmalloc_node-in-stack_alloc.patch " Andrew Morton
2020-04-15 17:44 ` + test_firmware-remove-unnecessary-test_fw_mutex-in-test_dev_config_show_xxx.patch " Andrew Morton
2020-04-15 18:12 ` + slub-avoid-redzone-when-choosing-freepointer-location.patch " Andrew Morton
2020-04-15 18:41 ` + mm-shmem-fix-build-without-thp.patch " Andrew Morton
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