The quilt patch titled
Subject: mm/madvise: free hwpoison and swapin error entry in madvise_free_pte_range
has been removed from the -mm tree. Its filename was
mm-madvise-free-hwpoison-and-swapin-error-entry-in-madvise_free_pte_range.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm/madvise: free hwpoison and swapin error entry in madvise_free_pte_range
Date: Thu, 19 May 2022 20:50:28 +0800
Once the MADV_FREE operation has succeeded, callers can expect they might
get zero-fill pages if accessing the memory again. Therefore it should be
safe to delete the hwpoison entry and swapin error entry. There is no
reason to kill the process if it has called MADV_FREE on the range.
Link: https://lkml.kernel.org/r/20220519125030.21486-4-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Suggested-by: Alistair Popple <apopple@xxxxxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: NeilBrown <neilb@xxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Ralph Campbell <rcampbell@xxxxxxxxxx>
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/madvise.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
--- a/mm/madvise.c~mm-madvise-free-hwpoison-and-swapin-error-entry-in-madvise_free_pte_range
+++ a/mm/madvise.c
@@ -624,11 +624,14 @@ static int madvise_free_pte_range(pmd_t
swp_entry_t entry;
entry = pte_to_swp_entry(ptent);
- if (non_swap_entry(entry))
- continue;
- nr_swap--;
- free_swap_and_cache(entry);
- pte_clear_not_present_full(mm, addr, pte, tlb->fullmm);
+ if (!non_swap_entry(entry)) {
+ nr_swap--;
+ free_swap_and_cache(entry);
+ pte_clear_not_present_full(mm, addr, pte, tlb->fullmm);
+ } else if (is_hwpoison_entry(entry) ||
+ is_swapin_error_entry(entry)) {
+ pte_clear_not_present_full(mm, addr, pte, tlb->fullmm);
+ }
continue;
}
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
