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mm/hwpoison: introduce folio_contain_hwpoisoned_page() helper

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commit 5f5ee52d4f upstream.

Patch series "mm/vmscan: don't try to reclaim hwpoison folio".

Fix a bug during memory reclaim if folio is hwpoisoned.


This patch (of 2):

Introduce helper folio_contain_hwpoisoned_page() to check if the entire
folio is hwpoisoned or it contains hwpoisoned pages.

Link: https://lkml.kernel.org/r/20250318083939.987651-1-tujinjiang@huawei.com
Link: https://lkml.kernel.org/r/20250318083939.987651-2-tujinjiang@huawei.com
Signed-off-by: Jinjiang Tu <tujinjiang@huawei.com>
Acked-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Nanyong Sun <sunnanyong@huawei.com>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jinjiang Tu
2025-03-18 16:39:38 +08:00
committed by Greg Kroah-Hartman
parent 125791284e
commit ff3be033d2
3 changed files with 8 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/page-flags.h
View File

@@ -1104,6 +1104,12 @@ static inline bool is_page_hwpoison(const struct page *page)
return folio_test_hugetlb(folio) && PageHWPoison(&folio->page);
}
static inline bool folio_contain_hwpoisoned_page(struct folio *folio)
{
return folio_test_hwpoison(folio) ||
(folio_test_large(folio) && folio_test_has_hwpoisoned(folio));
}
bool is_free_buddy_page(const struct page *page);
PAGEFLAG(Isolated, isolated, PF_ANY);

3
mm/memory_hotplug.c
View File

@@ -1828,8 +1828,7 @@ static void do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
if (unlikely(page_folio(page) != folio))
goto put_folio;
if (folio_test_hwpoison(folio) ||
(folio_test_large(folio) && folio_test_has_hwpoisoned(folio))) {
if (folio_contain_hwpoisoned_page(folio)) {
if (WARN_ON(folio_test_lru(folio)))
folio_isolate_lru(folio);
if (folio_mapped(folio)) {

3
mm/shmem.c
View File

@@ -3302,8 +3302,7 @@ shmem_write_begin(struct file *file, struct address_space *mapping,
if (ret)
return ret;
if (folio_test_hwpoison(folio) ||
(folio_test_large(folio) && folio_test_has_hwpoisoned(folio))) {
if (folio_contain_hwpoisoned_page(folio)) {
folio_unlock(folio);
folio_put(folio);
return -EIO;