From: David Hildenbrand <david@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
Shakeel Butt <shakeelb@google.com>,
John Hubbard <jhubbard@nvidia.com>,
Jason Gunthorpe <jgg@nvidia.com>,
Mike Kravetz <mike.kravetz@oracle.com>,
Mike Rapoport <rppt@linux.ibm.com>,
Yang Shi <shy828301@gmail.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Matthew Wilcox <willy@infradead.org>,
Vlastimil Babka <vbabka@suse.cz>, Jann Horn <jannh@google.com>,
Michal Hocko <mhocko@kernel.org>, Nadav Amit <namit@vmware.com>,
Rik van Riel <riel@surriel.com>, Roman Gushchin <guro@fb.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Peter Xu <peterx@redhat.com>, Donald Dutile <ddutile@redhat.com>,
Christoph Hellwig <hch@lst.de>, Oleg Nesterov <oleg@redhat.com>,
Jan Kara <jack@suse.cz>, Liang Zhang <zhangliang5@huawei.com>,
Pedro Gomes <pedrodemargomes@gmail.com>,
Oded Gabbay <oded.gabbay@gmail.com>,
linux-mm@kvack.org, David Hildenbrand <david@redhat.com>,
Khalid Aziz <khalid.aziz@oracle.com>
Subject: [PATCH v4 01/17] mm/rmap: fix missing swap_free() in try_to_unmap() after arch_unmap_one() failed
Date: Thu, 28 Apr 2022 10:34:25 +0200 [thread overview]
Message-ID: <20220428083441.37290-2-david@redhat.com> (raw)
In-Reply-To: <20220428083441.37290-1-david@redhat.com>
In case arch_unmap_one() fails, we already did a swap_duplicate(). let's
undo that properly via swap_free().
Fixes: ca827d55ebaa ("mm, swap: Add infrastructure for saving page metadata on swap")
Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
mm/rmap.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/rmap.c b/mm/rmap.c
index fedb82371efe..eb246fc8b089 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1637,6 +1637,7 @@ static bool try_to_unmap_one(struct folio *folio, struct vm_area_struct *vma,
break;
}
if (arch_unmap_one(mm, vma, address, pteval) < 0) {
+ swap_free(entry);
set_pte_at(mm, address, pvmw.pte, pteval);
ret = false;
page_vma_mapped_walk_done(&pvmw);
--
2.35.1
next prev parent reply other threads:[~2022-04-28 8:38 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-28 8:34 [PATCH v4 00/17] mm: COW fixes part 2: reliable GUP pins of anonymous pages David Hildenbrand
2022-04-28 8:34 ` David Hildenbrand [this message]
2022-04-28 8:34 ` [PATCH v4 02/17] mm/hugetlb: take src_mm->write_protect_seq in copy_hugetlb_page_range() David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 03/17] mm/memory: slightly simplify copy_present_pte() David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 04/17] mm/rmap: split page_dup_rmap() into page_dup_file_rmap() and page_try_dup_anon_rmap() David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 05/17] mm/rmap: convert RMAP flags to a proper distinct rmap_t type David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 06/17] mm/rmap: remove do_page_add_anon_rmap() David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 07/17] mm/rmap: pass rmap flags to hugepage_add_anon_rmap() David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 08/17] mm/rmap: drop "compound" parameter from page_add_new_anon_rmap() David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 09/17] mm/rmap: use page_move_anon_rmap() when reusing a mapped PageAnon() page exclusively David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 10/17] mm/huge_memory: remove outdated VM_WARN_ON_ONCE_PAGE from unmap_page() David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 11/17] mm/page-flags: reuse PG_mappedtodisk as PG_anon_exclusive for PageAnon() pages David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 12/17] mm: remember exclusively mapped anonymous pages with PG_anon_exclusive David Hildenbrand
2022-04-29 18:26 ` Andrew Morton
2022-04-29 18:56 ` David Hildenbrand
2022-12-06 3:05 ` Miaohe Lin
2022-12-06 8:43 ` David Hildenbrand
2022-12-06 9:37 ` Miaohe Lin
2022-12-06 9:40 ` David Hildenbrand
2022-12-06 11:28 ` Miaohe Lin
2022-04-28 8:34 ` [PATCH v4 13/17] mm/rmap: fail try_to_migrate() early when setting a PMD migration entry fails David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 14/17] mm/gup: disallow follow_page(FOLL_PIN) David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 15/17] mm: support GUP-triggered unsharing of anonymous pages David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 16/17] mm/gup: trigger FAULT_FLAG_UNSHARE when R/O-pinning a possibly shared anonymous page David Hildenbrand
2022-04-28 8:34 ` [PATCH v4 17/17] mm/gup: sanity-check with CONFIG_DEBUG_VM that anonymous pages are exclusive when (un)pinning David Hildenbrand
2022-04-28 8:37 ` [PATCH v4 00/17] mm: COW fixes part 2: reliable GUP pins of anonymous pages David Hildenbrand
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