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 0BB95C4332F for ; Thu, 19 May 2022 22:28:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245452AbiESW0S (ORCPT ); Thu, 19 May 2022 18:26:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50690 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245479AbiESWZw (ORCPT ); Thu, 19 May 2022 18:25:52 -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 0CF1FB35 for ; Thu, 19 May 2022 15:25:44 -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 9D83C616A0 for ; Thu, 19 May 2022 22:25:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 040AFC385AA; Thu, 19 May 2022 22:25:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1652999143; bh=Ua1rsvIs1hWbP+PB274rH6ZVYi6ZmhH8jc/HCezQKJA=; h=Date:To:From:Subject:From; b=iDtfkmOAVHVkvSt4ElCkJF24cAAVOS+GMGqgudY3jKZNw4Kh5RaRZCnNiEQ/N7Qtq x3JeFwly6HVkF4Td267uLCR5Ro94DPtwJoOEAB0FAe2XbJEfF34CQ+ah+pJncAWP6A XAxtfiFpqrvOG+PFFPdBnS8VrNZhaFZz1BUoP6EU= Date: Thu, 19 May 2022 15:25:42 -0700 To: mm-commits@vger.kernel.org, willy@infradead.org, vbabka@suse.cz, surenb@google.com, peterx@redhat.com, osalvador@suse.de, neilb@suse.de, naoya.horiguchi@nec.com, dhowells@redhat.com, david@redhat.com, apopple@nvidia.com, linmiaohe@huawei.com, akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-swap-avoid-calling-swp_swap_info-when-try-to-check-swp_stable_writes.patch removed from -mm tree Message-Id: <20220519222543.040AFC385AA@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The quilt patch titled Subject: mm/swap: avoid calling swp_swap_info when try to check SWP_STABLE_WRITES has been removed from the -mm tree. Its filename was mm-swap-avoid-calling-swp_swap_info-when-try-to-check-swp_stable_writes.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 Subject: mm/swap: avoid calling swp_swap_info when try to check SWP_STABLE_WRITES Use flags of si directly to check SWP_STABLE_WRITES to avoid possible READ_ONCE and thus save some cpu cycles. [akpm@linux-foundation.org: use data_race() on si->flags, per Neil] Link: https://lkml.kernel.org/r/20220509131416.17553-10-linmiaohe@huawei.com Signed-off-by: Miaohe Lin Cc: Alistair Popple Cc: David Hildenbrand Cc: David Howells Cc: Matthew Wilcox Cc: Naoya Horiguchi Cc: NeilBrown Cc: Peter Xu Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Oscar Salvador Signed-off-by: Andrew Morton --- mm/memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/memory.c~mm-swap-avoid-calling-swp_swap_info-when-try-to-check-swp_stable_writes +++ a/mm/memory.c @@ -3889,7 +3889,7 @@ vm_fault_t do_swap_page(struct vm_fault */ exclusive = true; } else if (exclusive && PageWriteback(page) && - (swp_swap_info(entry)->flags & SWP_STABLE_WRITES)) { + data_race(si->flags & SWP_STABLE_WRITES)) { /* * This is tricky: not all swap backends support * concurrent page modifications while under writeback. _ Patches currently in -mm which might be from linmiaohe@huawei.com are 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 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-shmem-fix-infinite-loop-when-swap-in-shmem-error-at-swapoff-time.patch mm-filter-out-swapin-error-entry-in-shmem-mapping.patch