The patch titled
Subject: mm-convert-dax-lock-unlock-page-to-lock-unlock-folio-fix
has been added to the -mm mm-unstable branch. Its filename is
mm-convert-dax-lock-unlock-page-to-lock-unlock-folio-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-convert-dax-lock-unlock-page-to-lock-unlock-folio-fix.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: Jane Chu <jane.chu@xxxxxxxxxx>
Subject: mm-convert-dax-lock-unlock-page-to-lock-unlock-folio-fix
Date: Fri, 8 Sep 2023 16:23:36 -0600
add comment to mf_generic_kill_procss(), simplify
mf_generic_kill_procs:folio initialization.
Link: https://lkml.kernel.org/r/20230908222336.186313-1-jane.chu@xxxxxxxxxx
Signed-off-by: Jane Chu <jane.chu@xxxxxxxxxx>
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
--- a/mm/memory-failure.c~mm-convert-dax-lock-unlock-page-to-lock-unlock-folio-fix
+++ a/mm/memory-failure.c
@@ -1720,11 +1720,19 @@ static void unmap_and_kill(struct list_h
kill_procs(to_kill, flags & MF_MUST_KILL, false, pfn, flags);
}
+/*
+ * Only dev_pagemap pages get here, such as fsdax when the filesystem
+ * either do not claim or fails to claim a hwpoison event, or devdax.
+ * The fsdax pages are initialized per base page, and the devdax pages
+ * could be initialized either as base pages, or as compound pages with
+ * vmemmap optimization enabled. Devdax is simplistic in its dealing with
+ * hwpoison, such that, if a subpage of a compound page is poisoned,
+ * simply mark the compound head page is by far sufficient.
+ */
static int mf_generic_kill_procs(unsigned long long pfn, int flags,
struct dev_pagemap *pgmap)
{
- struct page *page = pfn_to_page(pfn);
- struct folio *folio = page_folio(page);
+ struct folio *folio = pfn_folio(pfn);
LIST_HEAD(to_kill);
dax_entry_t cookie;
int rc = 0;
_
Patches currently in -mm which might be from jane.chu@xxxxxxxxxx are
mm-convert-dax-lock-unlock-page-to-lock-unlock-folio-fix.patch
