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
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 v2 14/19] mm/hugetlb: Clear PageHWPoison on the non-error memory page
Date: Mon, 26 Oct 2020 22:51:09 +0800 [thread overview]
Message-ID: <20201026145114.59424-15-songmuchun@bytedance.com> (raw)
In-Reply-To: <20201026145114.59424-1-songmuchun@bytedance.com>
Because we reuse the first tail page, if we set PageHWPosion on a
tail page. It indicates that we may set PageHWPoison on a series
of pages. So we need to clear PageHWPoison on the non-error pages.
We use the head[3].mapping to record the real error page index and
clear non-error page PageHWPoison later.
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
---
mm/hugetlb.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index e3209fd2e6b2..7198bd9bdce5 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1806,6 +1806,21 @@ static inline void free_gigantic_page_comm(struct hstate *h, struct page *page)
{
free_gigantic_page(page, huge_page_order(h));
}
+
+static inline bool subpage_hwpoison(struct page *head, struct page *page)
+{
+ return page_private(head + 4) == page - head;
+}
+
+static inline void set_subpage_hwpoison(struct page *head, struct page *page)
+{
+ set_page_private(head + 4, page - head);
+}
+
+static inline void clear_subpage_hwpoison(struct page *head)
+{
+ set_page_private(head + 4, 0);
+}
#else
static inline void hugetlb_vmemmap_init(struct hstate *h)
{
@@ -1853,6 +1868,19 @@ static inline void free_gigantic_page_comm(struct hstate *h, struct page *page)
free_gigantic_page(page, huge_page_order(h));
spin_lock(&hugetlb_lock);
}
+
+static inline bool subpage_hwpoison(struct page *head, struct page *page)
+{
+ return true;
+}
+
+static inline void set_subpage_hwpoison(struct page *head, struct page *page)
+{
+}
+
+static inline void clear_subpage_hwpoison(struct page *head)
+{
+}
#endif
static void update_and_free_page(struct hstate *h, struct page *page)
@@ -1877,6 +1905,9 @@ static void __free_hugepage(struct hstate *h, struct page *page)
1 << PG_referenced | 1 << PG_dirty |
1 << PG_active | 1 << PG_private |
1 << PG_writeback);
+
+ if (PageHWPoison(page + i) && !subpage_hwpoison(page, page + i))
+ ClearPageHWPoison(page + i);
}
VM_BUG_ON_PAGE(hugetlb_cgroup_from_page(page), page);
VM_BUG_ON_PAGE(hugetlb_cgroup_from_page_rsvd(page), page);
@@ -2066,6 +2097,7 @@ static void prep_new_huge_page(struct hstate *h, struct page *page, int nid)
free_huge_page_vmemmap(h, page);
/* Must be called before the initialization of @page->lru */
vmemmap_pgtable_free(h, page);
+ clear_subpage_hwpoison(page);
INIT_LIST_HEAD(&page->lru);
set_compound_page_dtor(page, HUGETLB_PAGE_DTOR);
@@ -2436,6 +2468,7 @@ int dissolve_free_huge_page(struct page *page)
SetPageHWPoison(page);
ClearPageHWPoison(head);
}
+ set_subpage_hwpoison(head, page);
list_del(&head->lru);
h->free_huge_pages--;
h->free_huge_pages_node[nid]--;
--
2.20.1
next prev parent reply other threads:[~2020-10-26 14:55 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-26 14:50 [PATCH v2 00/19] Free some vmemmap pages of hugetlb page Muchun Song
2020-10-26 14:50 ` [PATCH v2 01/19] mm/memory_hotplug: Move bootmem info registration API to bootmem_info.c Muchun Song
2020-10-26 14:50 ` [PATCH v2 02/19] mm/memory_hotplug: Move {get,put}_page_bootmem() " Muchun Song
2020-10-26 14:50 ` [PATCH v2 03/19] mm/hugetlb: Introduce a new config HUGETLB_PAGE_FREE_VMEMMAP Muchun Song
2020-10-29 10:29 ` Oscar Salvador
2020-10-29 13:34 ` [External] " Muchun Song
2020-10-26 14:50 ` [PATCH v2 04/19] mm/hugetlb: Introduce nr_free_vmemmap_pages in the struct hstate Muchun Song
2020-10-27 22:03 ` Mike Kravetz
2020-10-29 13:26 ` Oscar Salvador
2020-10-29 13:41 ` [External] " Muchun Song
2020-10-26 14:51 ` [PATCH v2 05/19] mm/hugetlb: Introduce pgtable allocation/freeing helpers Muchun Song
2020-10-28 0:32 ` Mike Kravetz
2020-10-28 7:26 ` [External] " Muchun Song
2020-10-28 23:42 ` Mike Kravetz
2020-11-05 13:23 ` Oscar Salvador
2020-11-05 16:08 ` [External] " Muchun Song
2020-11-06 9:46 ` Oscar Salvador
2020-11-06 16:43 ` Muchun Song
2020-10-26 14:51 ` [PATCH v2 06/19] mm/bootmem_info: Introduce {free,prepare}_vmemmap_page() Muchun Song
2020-10-26 14:51 ` [PATCH v2 07/19] mm/hugetlb: Free the vmemmap pages associated with each hugetlb page Muchun Song
2020-10-26 16:01 ` Matthew Wilcox
2020-10-27 2:58 ` [External] " Muchun Song
2020-10-28 23:42 ` Mike Kravetz
2020-10-29 6:13 ` [External] " Muchun Song
2020-10-29 21:59 ` Mike Kravetz
2020-10-30 2:58 ` Muchun Song
2020-10-26 14:51 ` [PATCH v2 08/19] mm/hugetlb: Defer freeing of hugetlb pages Muchun Song
2020-10-26 14:51 ` [PATCH v2 09/19] mm/hugetlb: Allocate the vmemmap pages associated with each hugetlb page Muchun Song
2020-10-26 14:51 ` [PATCH v2 10/19] mm/hugetlb: Introduce remap_huge_page_pmd_vmemmap helper Muchun Song
2020-10-26 14:51 ` [PATCH v2 11/19] mm/hugetlb: Use PG_slab to indicate split pmd Muchun Song
2020-10-26 14:51 ` [PATCH v2 12/19] mm/hugetlb: Support freeing vmemmap pages of gigantic page Muchun Song
2020-10-26 14:51 ` [PATCH v2 13/19] mm/hugetlb: Add a BUILD_BUG_ON to check if struct page size is a power of two Muchun Song
2020-10-26 14:51 ` Muchun Song [this message]
2020-10-26 14:51 ` [PATCH v2 15/19] mm/hugetlb: Flush work when dissolving hugetlb page Muchun Song
2020-10-26 14:51 ` [PATCH v2 16/19] mm/hugetlb: Add a kernel parameter hugetlb_free_vmemmap Muchun Song
2020-10-26 14:51 ` [PATCH v2 17/19] mm/hugetlb: Merge pte to huge pmd only for gigantic page Muchun Song
2020-10-26 14:51 ` [PATCH v2 18/19] mm/hugetlb: Gather discrete indexes of tail page Muchun Song
2020-10-26 14:51 ` [PATCH v2 19/19] mm/hugetlb: Add BUILD_BUG_ON to catch invalid usage of tail struct page Muchun Song
2020-10-26 15:53 ` [PATCH v2 00/19] Free some vmemmap pages of hugetlb page Matthew Wilcox
2020-10-27 2:54 ` [External] " Muchun Song
2020-10-30 9:14 ` Michal Hocko
2020-10-30 10:24 ` [External] " Muchun Song
2020-10-30 15:19 ` Michal Hocko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201026145114.59424-15-songmuchun@bytedance.com \
--to=songmuchun@bytedance.com \
--cc=akpm@linux-foundation.org \
--cc=almasrymina@google.com \
--cc=anshuman.khandual@arm.com \
--cc=bp@alien8.de \
--cc=corbet@lwn.net \
--cc=dave.hansen@linux.intel.com \
--cc=duanxiongchun@bytedance.com \
--cc=hpa@zytor.com \
--cc=jroedel@suse.de \
--cc=linux-doc@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=luto@kernel.org \
--cc=mchehab+huawei@kernel.org \
--cc=mike.kravetz@oracle.com \
--cc=mingo@redhat.com \
--cc=oneukum@suse.com \
--cc=paulmck@kernel.org \
--cc=pawan.kumar.gupta@linux.intel.com \
--cc=peterz@infradead.org \
--cc=rdunlap@infradead.org \
--cc=rientjes@google.com \
--cc=tglx@linutronix.de \
--cc=viro@zeniv.linux.org.uk \
--cc=willy@infradead.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).