The patch titled Subject: mm/memory-failure: fix hardware poison check in unpoison_memory() has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-memory-failure-fix-hardware-poison-check-in-unpoison_memory.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Sidhartha Kumar sidhartha.kumar@oracle.com Subject: mm/memory-failure: fix hardware poison check in unpoison_memory() Date: Mon, 17 Jul 2023 11:18:12 -0700

It was pointed out[1] that using folio_test_hwpoison() is wrong as we need to check the indiviual page that has poison. folio_test_hwpoison() only checks the head page so go back to using PageHWPoison().

[1]: https://lore.kernel.org/lkml/ZLIbZygG7LqSI9xe@casper.infradead.org/

Link: https://lkml.kernel.org/r/20230717181812.167757-1-sidhartha.kumar@oracle.com Fixes: a6fddef49eef ("mm/memory-failure: convert unpoison_memory() to folios") Signed-off-by: Sidhartha Kumar sidhartha.kumar@oracle.com Reported-by: Matthew Wilcox (Oracle) willy@infradead.org Cc: Miaohe Lin linmiaohe@huawei.com Cc: Naoya Horiguchi naoya.horiguchi@nec.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

mm/memory-failure.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/memory-failure.c~mm-memory-failure-fix-hardware-poison-check-in-unpoison_memory +++ a/mm/memory-failure.c @@ -2487,7 +2487,7 @@ int unpoison_memory(unsigned long pfn) goto unlock_mutex; }

- if (!folio_test_hwpoison(folio)) { + if (!PageHWPoison(p)) { unpoison_pr_info("Unpoison: Page was already unpoisoned %#lx\n", pfn, &unpoison_rs); goto unlock_mutex; _

Patches currently in -mm which might be from sidhartha.kumar@oracle.com are

mm-memory-failure-fix-hardware-poison-check-in-unpoison_memory.patch mm-increase-usage-of-folio_next_index-helper.patch mm-memory-convert-do_page_mkwrite-to-use-folios.patch mm-memory-convert-wp_page_shared-to-use-folios.patch mm-memory-convert-do_shared_fault-to-folios.patch mm-memory-convert-do_read_fault-to-use-folios.patch mm-memory-pass-folio-into-do_page_mkwrite.patch