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mm/huge_memory: convert has_hwpoisoned into a pure folio flag

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Patch series "mm: hugetlb+THP folio and migration cleanups", v2.

Some cleanups around more folio conversion and migration handling that I
collected working on random stuff.


This patch (of 6):

Let's stop setting it on pages, there is no need to anymore.

Link: https://lkml.kernel.org/r/20250113131611.2554758-2-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
David Hildenbrand 2025-01-13 14:16:06 +01:00 • committed by Andrew Morton
parent f57f63b0f0
commit 8d91fed83c
2 changed files with 3 additions and 5 deletions
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6
include/linux/page-flags.h
View file

@ -906,11 +906,9 @@ TESTPAGEFLAG_FALSE(TransCompound, transcompound)
*
* This flag is set by hwpoison handler. Cleared by THP split or free page.
*/
PAGEFLAG(HasHWPoisoned, has_hwpoisoned, PF_SECOND)
TESTSCFLAG(HasHWPoisoned, has_hwpoisoned, PF_SECOND)
FOLIO_FLAG(has_hwpoisoned, FOLIO_SECOND_PAGE)
#else
PAGEFLAG_FALSE(HasHWPoisoned, has_hwpoisoned)
TESTSCFLAG_FALSE(HasHWPoisoned, has_hwpoisoned)
FOLIO_FLAG_FALSE(has_hwpoisoned)
#endif
/*

2
mm/huge_memory.c
View file

@ -3290,7 +3290,7 @@ static void __split_huge_page(struct page *page, struct list_head *list,
/* lock lru list/PageCompound, ref frozen by page_ref_freeze */
lruvec = folio_lruvec_lock(folio);
ClearPageHasHWPoisoned(head);
folio_clear_has_hwpoisoned(folio);
for (i = nr - new_nr; i >= new_nr; i -= new_nr) {
struct folio *tail;