The patch titled
Subject: mm, hwpoison: enable memory error handling on 1GB hugepage
has been added to the -mm mm-unstable branch. Its filename is
mm-hwpoison-enable-memory-error-handling-on-1gb-hugepage.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-hwpoison-enable-memory-error-handling-on-1gb-hugepage.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Subject: mm, hwpoison: enable memory error handling on 1GB hugepage
Date: Thu, 2 Jun 2022 14:06:31 +0900
Now error handling code is prepared, so remove the blocking code and
enable memory error handling on 1GB hugepage.
Link: https://lkml.kernel.org/r/20220602050631.771414-6-naoya.horiguchi@xxxxxxxxx
Signed-off-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Liu Shixin <liushixin2@xxxxxxxxxx>
Cc: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 1 -
include/ras/ras_event.h | 1 -
mm/memory-failure.c | 16 ----------------
3 files changed, 18 deletions(-)
--- a/include/linux/mm.h~mm-hwpoison-enable-memory-error-handling-on-1gb-hugepage
+++ a/include/linux/mm.h
@@ -3299,7 +3299,6 @@ enum mf_action_page_type {
MF_MSG_DIFFERENT_COMPOUND,
MF_MSG_HUGE,
MF_MSG_FREE_HUGE,
- MF_MSG_NON_PMD_HUGE,
MF_MSG_UNMAP_FAILED,
MF_MSG_DIRTY_SWAPCACHE,
MF_MSG_CLEAN_SWAPCACHE,
--- a/include/ras/ras_event.h~mm-hwpoison-enable-memory-error-handling-on-1gb-hugepage
+++ a/include/ras/ras_event.h
@@ -360,7 +360,6 @@ TRACE_EVENT(aer_event,
EM ( MF_MSG_DIFFERENT_COMPOUND, "different compound page after locking" ) \
EM ( MF_MSG_HUGE, "huge page" ) \
EM ( MF_MSG_FREE_HUGE, "free huge page" ) \
- EM ( MF_MSG_NON_PMD_HUGE, "non-pmd-sized huge page" ) \
EM ( MF_MSG_UNMAP_FAILED, "unmapping failed page" ) \
EM ( MF_MSG_DIRTY_SWAPCACHE, "dirty swapcache page" ) \
EM ( MF_MSG_CLEAN_SWAPCACHE, "clean swapcache page" ) \
--- a/mm/memory-failure.c~mm-hwpoison-enable-memory-error-handling-on-1gb-hugepage
+++ a/mm/memory-failure.c
@@ -726,7 +726,6 @@ static const char * const action_page_ty
[MF_MSG_DIFFERENT_COMPOUND] = "different compound page after locking",
[MF_MSG_HUGE] = "huge page",
[MF_MSG_FREE_HUGE] = "free huge page",
- [MF_MSG_NON_PMD_HUGE] = "non-pmd-sized huge page",
[MF_MSG_UNMAP_FAILED] = "unmapping failed page",
[MF_MSG_DIRTY_SWAPCACHE] = "dirty swapcache page",
[MF_MSG_CLEAN_SWAPCACHE] = "clean swapcache page",
@@ -1615,21 +1614,6 @@ retry:
page_flags = head->flags;
- /*
- * TODO: hwpoison for pud-sized hugetlb doesn't work right now, so
- * simply disable it. In order to make it work properly, we need
- * make sure that:
- * - conversion of a pud that maps an error hugetlb into hwpoison
- * entry properly works, and
- * - other mm code walking over page table is aware of pud-aligned
- * hwpoison entries.
- */
- if (huge_page_size(page_hstate(head)) > PMD_SIZE) {
- action_result(pfn, MF_MSG_NON_PMD_HUGE, MF_IGNORED);
- res = -EBUSY;
- goto out;
- }
-
if (!hwpoison_user_mappings(p, pfn, flags, head)) {
action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED);
res = -EBUSY;
_
Patches currently in -mm which might be from naoya.horiguchi@xxxxxxx are
mm-hwpoison-hugetlb-introduce-subpage_index_hwpoison-to-save-raw-error-page.patch
mmhwpoison-set-pg_hwpoison-for-busy-hugetlb-pages.patch
mm-hwpoison-make-__page_handle_poison-returns-int.patch
mm-hwpoison-skip-raw-hwpoison-page-in-freeing-1gb-hugepage.patch
mm-hwpoison-enable-memory-error-handling-on-1gb-hugepage.patch
