From: Muchun Song <songmuchun@bytedance.com>
To: corbet@lwn.net, mike.kravetz@oracle.com, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com,
dave.hansen@linux.intel.com, luto@kernel.org,
peterz@infradead.org, viro@zeniv.linux.org.uk,
akpm@linux-foundation.org, paulmck@kernel.org,
mchehab+huawei@kernel.org, pawan.kumar.gupta@linux.intel.com,
rdunlap@infradead.org, oneukum@suse.com,
anshuman.khandual@arm.com, jroedel@suse.de,
almasrymina@google.com, rientjes@google.com, willy@infradead.org,
osalvador@suse.de, mhocko@suse.com, song.bao.hua@hisilicon.com,
david@redhat.com, naoya.horiguchi@nec.com
Cc: duanxiongchun@bytedance.com, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org,
Muchun Song <songmuchun@bytedance.com>
Subject: [PATCH v13 06/12] mm: hugetlb: set the PageHWPoison to the raw error page
Date: Sun, 17 Jan 2021 23:10:47 +0800 [thread overview]
Message-ID: <20210117151053.24600-7-songmuchun@bytedance.com> (raw)
In-Reply-To: <20210117151053.24600-1-songmuchun@bytedance.com>
Because we reuse the first tail vmemmap page frame and remap it
with read-only, we cannot set the PageHWPosion on a tail page.
So we can use the head[4].private to record the real error page
index and set the raw error page PageHWPoison later.
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
---
mm/hugetlb.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 61 insertions(+), 8 deletions(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index d11c32fcdb38..6caaa7e5dd2a 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1358,6 +1358,63 @@ static inline void __update_and_free_page(struct hstate *h, struct page *page)
schedule_work(&hpage_update_work);
}
+#ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
+static inline void hwpoison_subpage_deliver(struct hstate *h, struct page *head)
+{
+ struct page *page;
+
+ if (!PageHWPoison(head) || !free_vmemmap_pages_per_hpage(h))
+ return;
+
+ page = head + page_private(head + 4);
+
+ /*
+ * Move PageHWPoison flag from head page to the raw error page,
+ * which makes any subpages rather than the error page reusable.
+ */
+ if (page != head) {
+ SetPageHWPoison(page);
+ ClearPageHWPoison(head);
+ }
+}
+
+static inline void hwpoison_subpage_set(struct hstate *h, struct page *head,
+ struct page *page)
+{
+ if (!PageHWPoison(head))
+ return;
+
+ if (free_vmemmap_pages_per_hpage(h)) {
+ set_page_private(head + 4, page - head);
+ } else if (page != head) {
+ /*
+ * Move PageHWPoison flag from head page to the raw error page,
+ * which makes any subpages rather than the error page reusable.
+ */
+ SetPageHWPoison(page);
+ ClearPageHWPoison(head);
+ }
+}
+
+#else
+static inline void hwpoison_subpage_deliver(struct hstate *h, struct page *head)
+{
+}
+
+static inline void hwpoison_subpage_set(struct hstate *h, struct page *head,
+ struct page *page)
+{
+ if (PageHWPoison(head) && page != head) {
+ /*
+ * Move PageHWPoison flag from head page to the raw error page,
+ * which makes any subpages rather than the error page reusable.
+ */
+ SetPageHWPoison(page);
+ ClearPageHWPoison(head);
+ }
+}
+#endif
+
static void update_and_free_page(struct hstate *h, struct page *page)
{
if (hstate_is_gigantic(h) && !gigantic_page_runtime_supported())
@@ -1373,6 +1430,8 @@ static void __free_hugepage(struct hstate *h, struct page *page)
{
int i;
+ hwpoison_subpage_deliver(h, page);
+
for (i = 0; i < pages_per_huge_page(h); i++) {
page[i].flags &= ~(1 << PG_locked | 1 << PG_error |
1 << PG_referenced | 1 << PG_dirty |
@@ -1845,14 +1904,8 @@ int dissolve_free_huge_page(struct page *page)
int nid = page_to_nid(head);
if (h->free_huge_pages - h->resv_huge_pages == 0)
goto out;
- /*
- * Move PageHWPoison flag from head page to the raw error page,
- * which makes any subpages rather than the error page reusable.
- */
- if (PageHWPoison(head) && page != head) {
- SetPageHWPoison(page);
- ClearPageHWPoison(head);
- }
+
+ hwpoison_subpage_set(h, head, page);
list_del(&head->lru);
h->free_huge_pages--;
h->free_huge_pages_node[nid]--;
--
2.11.0
next prev parent reply other threads:[~2021-01-17 15:14 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-17 15:10 [PATCH v13 00/12] Free some vmemmap pages of HugeTLB page Muchun Song
2021-01-17 15:10 ` [PATCH v13 01/12] mm: memory_hotplug: factor out bootmem core functions to bootmem_info.c Muchun Song
2021-01-25 2:48 ` Miaohe Lin
2021-01-17 15:10 ` [PATCH v13 02/12] mm: hugetlb: introduce a new config HUGETLB_PAGE_FREE_VMEMMAP Muchun Song
2021-01-24 23:58 ` David Rientjes
2021-01-25 3:16 ` Randy Dunlap
2021-01-25 4:06 ` [External] " Muchun Song
2021-01-25 4:08 ` Randy Dunlap
2021-01-25 5:06 ` Muchun Song
2021-01-25 18:47 ` David Rientjes
2021-01-26 2:45 ` Muchun Song
2021-01-26 20:13 ` David Rientjes
2021-01-26 2:07 ` Miaohe Lin
2021-01-17 15:10 ` [PATCH v13 03/12] mm: hugetlb: free the vmemmap pages associated with each HugeTLB page Muchun Song
2021-01-17 15:29 ` Muchun Song
2021-01-23 0:59 ` Mike Kravetz
2021-01-23 3:22 ` [External] " Muchun Song
2021-01-23 17:52 ` Oscar Salvador
2021-01-24 6:48 ` [External] " Muchun Song
2021-01-17 15:10 ` [PATCH v13 04/12] mm: hugetlb: defer freeing of HugeTLB pages Muchun Song
2021-01-24 23:55 ` David Rientjes
2021-01-25 3:58 ` [External] " Muchun Song
2021-01-17 15:10 ` [PATCH v13 05/12] mm: hugetlb: allocate the vmemmap pages associated with each HugeTLB page Muchun Song
2021-01-25 0:05 ` David Rientjes
2021-01-25 6:40 ` [External] " Muchun Song
2021-01-25 7:41 ` Muchun Song
2021-01-25 9:15 ` David Hildenbrand
2021-01-25 9:34 ` Muchun Song
2021-01-25 23:25 ` Mike Kravetz
2021-01-26 7:48 ` Oscar Salvador
2021-01-26 9:29 ` Oscar Salvador
2021-01-26 9:36 ` David Hildenbrand
2021-01-26 14:58 ` Oscar Salvador
2021-01-26 15:10 ` David Hildenbrand
2021-01-26 15:34 ` Oscar Salvador
2021-01-26 15:56 ` David Hildenbrand
2021-01-27 10:36 ` David Hildenbrand
2021-01-28 12:37 ` [External] " Muchun Song
2021-01-28 13:08 ` Muchun Song
2021-01-29 1:04 ` Mike Kravetz
2021-01-29 6:56 ` Muchun Song
2021-02-01 16:10 ` David Hildenbrand
2021-02-02 0:05 ` Mike Kravetz
2021-01-28 22:29 ` Oscar Salvador
2021-01-29 6:16 ` [External] " Muchun Song
2021-02-01 15:50 ` David Hildenbrand
2021-01-17 15:10 ` Muchun Song [this message]
2021-01-25 0:06 ` [PATCH v13 06/12] mm: hugetlb: set the PageHWPoison to the raw error page David Rientjes
2021-01-25 5:06 ` [External] " Muchun Song
2021-01-17 15:10 ` [PATCH v13 07/12] mm: hugetlb: flush work when dissolving a HugeTLB page Muchun Song
2021-01-17 15:10 ` [PATCH v13 08/12] mm: hugetlb: introduce PageHugeInflight Muchun Song
2021-01-17 15:10 ` [PATCH v13 09/12] mm: hugetlb: add a kernel parameter hugetlb_free_vmemmap Muchun Song
2021-01-25 11:43 ` David Hildenbrand
2021-01-25 12:08 ` Oscar Salvador
2021-01-25 12:31 ` [External] " Muchun Song
2021-01-25 12:30 ` Muchun Song
2021-01-17 15:10 ` [PATCH v13 10/12] mm: hugetlb: introduce nr_free_vmemmap_pages in the struct hstate Muchun Song
2021-01-17 15:10 ` [PATCH v13 11/12] mm: hugetlb: gather discrete indexes of tail page Muchun Song
2021-01-17 15:10 ` [PATCH v13 12/12] mm: hugetlb: optimize the code with the help of the compiler Muchun Song
2021-01-20 12:52 ` [PATCH v13 00/12] Free some vmemmap pages of HugeTLB page Muchun Song
2021-01-20 13:10 ` Oscar Salvador
2021-01-20 14:22 ` [External] " Muchun Song
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