From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 29A59C433F5 for ; Fri, 29 Apr 2022 07:04:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354844AbiD2HH1 (ORCPT ); Fri, 29 Apr 2022 03:07:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236404AbiD2HH1 (ORCPT ); Fri, 29 Apr 2022 03:07:27 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CF22BE9C8 for ; Fri, 29 Apr 2022 00:04:10 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A81B361F5B for ; Fri, 29 Apr 2022 07:04:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09C66C385A7; Fri, 29 Apr 2022 07:04:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1651215849; bh=1xWdXAbsD5ujvngU/BApCkvJYnoNfrk0EUFlOVtQRYo=; h=Date:To:From:Subject:From; b=WwUYDDFa8gdhcNFU3cO4UhQcaNuXrvMCGb7ukazOaJDTmivbB9ok3KlfdFursZiVs yMyYKknAgklcw6FH0Q0cmno+Ha6Qh3TY3FqsZCEshaWFHirti6qgXaIaPA33P3G6SO k1o41SrnqffuBlkZbWOZb0OrC5MyFBnzLRN0vBnQ= Date: Fri, 29 Apr 2022 00:04:08 -0700 To: mm-commits@vger.kernel.org, vitaly.wool@konsulko.com, linmiaohe@huawei.com, akpm@linux-foundation.org From: Andrew Morton Subject: + mm-z3fold-fix-sheduling-while-atomic.patch added to mm-unstable branch Message-Id: <20220429070409.09C66C385A7@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: mm/z3fold: fix sheduling while atomic has been added to the -mm mm-unstable branch. Its filename is mm-z3fold-fix-sheduling-while-atomic.patch This patch should soon appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Miaohe Lin Subject: mm/z3fold: fix sheduling while atomic Patch series "A few fixup patches for z3fold". This series contains a few fixup patches to fix sheduling while atomic, fix possible null pointer dereferencing, fix various race conditions and so on. More details can be found in the respective changelogs. This patch (of 9): z3fold's page_lock is always held when calling alloc_slots. So gfp should be GFP_ATOMIC to avoid "scheduling while atomic" bug. Link: https://lkml.kernel.org/r/20220429064051.61552-1-linmiaohe@huawei.com Link: https://lkml.kernel.org/r/20220429064051.61552-2-linmiaohe@huawei.com Fixes: fc5488651c7d ("z3fold: simplify freeing slots") Signed-off-by: Miaohe Lin Cc: Vitaly Wool Signed-off-by: Andrew Morton --- mm/z3fold.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/mm/z3fold.c~mm-z3fold-fix-sheduling-while-atomic +++ a/mm/z3fold.c @@ -941,8 +941,7 @@ lookup: } if (zhdr && !zhdr->slots) - zhdr->slots = alloc_slots(pool, - can_sleep ? GFP_NOIO : GFP_ATOMIC); + zhdr->slots = alloc_slots(pool, GFP_ATOMIC); return zhdr; } _ Patches currently in -mm which might be from linmiaohe@huawei.com are mm-swapfile-unuse_pte-can-map-random-data-if-swap-read-fails.patch mm-swapfile-fix-lost-swap-bits-in-unuse_pte.patch mm-madvise-free-hwpoison-and-swapin-error-entry-in-madvise_free_pte_range.patch mm-migration-reduce-the-rcu-lock-duration.patch mm-migration-remove-unneeded-lock-page-and-pagemovable-check.patch mm-migration-return-errno-when-isolate_huge_page-failed.patch mm-migration-fix-potential-pte_unmap-on-an-not-mapped-pte.patch mm-vmscan-take-min_slab_pages-into-account-when-try-to-call-shrink_node.patch mm-vmscan-add-a-comment-about-madv_free-pages-check-in-folio_check_dirty_writeback.patch mm-vmscan-introduce-helper-function-reclaim_page_list.patch mm-vmscan-take-all-base-pages-of-thp-into-account-when-race-with-speculative-reference.patch mm-vmscan-remove-obsolete-comment-in-kswapd_run.patch mm-vmscan-use-helper-folio_is_file_lru.patch mm-vmscan-use-helper-folio_is_file_lru-fix.patch mm-z3fold-fix-sheduling-while-atomic.patch mm-z3fold-fix-possible-null-pointer-dereferencing.patch mm-z3fold-remove-buggy-use-of-stale-list-for-allocation.patch mm-z3fold-throw-warning-on-failure-of-trylock_page-in-z3fold_alloc.patch revert-mm-z3foldc-allow-__gfp_highmem-in-z3fold_alloc.patch mm-z3fold-put-z3fold-page-back-into-unbuddied-list-when-reclaim-or-migration-fails.patch mm-z3fold-always-clear-page_claimed-under-z3fold-page-lock.patch mm-z3fold-fix-z3fold_reclaim_page-races-with-z3fold_free.patch mm-z3fold-fix-z3fold_page_migrate-races-with-z3fold_map.patch