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 9686EC41513 for ; Mon, 14 Aug 2023 20:30:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231504AbjHNU34 (ORCPT ); Mon, 14 Aug 2023 16:29:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231476AbjHNU3w (ORCPT ); Mon, 14 Aug 2023 16:29:52 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00FDD110 for ; Mon, 14 Aug 2023 13:29:50 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9343361F44 for ; Mon, 14 Aug 2023 20:29:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E3E8AC433C8; Mon, 14 Aug 2023 20:29:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1692044990; bh=gzuj7vHRsmxRTFA37O282yGP0W2MrILLr5a+Qr6/KQg=; h=Date:To:From:Subject:From; b=a7xg8QlsMS/5kc68tMaM2xUcfXR2momrwG3LFkbLSElKJT+TyYPpkIw0oCdfUxCnL jbV6ju2jv/QFuLyxaqQH/xkRrHas/EBMYmVidvouWYoq3rIedEAa6QbU+/J231dtE4 qhz1tHvn+pKM2K/TjRNXszGTlfrknFirENnsJ7BU= Date: Mon, 14 Aug 2023 13:29:49 -0700 To: mm-commits@vger.kernel.org, surenb@google.com, david@redhat.com, willy@infradead.org, akpm@linux-foundation.org From: Andrew Morton Subject: + mm-allow-fault_dirty_shared_page-to-be-called-under-the-vma-lock.patch added to mm-unstable branch Message-Id: <20230814202949.E3E8AC433C8@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: allow fault_dirty_shared_page() to be called under the VMA lock has been added to the -mm mm-unstable branch. Its filename is mm-allow-fault_dirty_shared_page-to-be-called-under-the-vma-lock.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-allow-fault_dirty_shared_page-to-be-called-under-the-vma-lock.patch This patch will later 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: "Matthew Wilcox (Oracle)" Subject: mm: allow fault_dirty_shared_page() to be called under the VMA lock Date: Sat, 12 Aug 2023 01:20:33 +0100 By making maybe_unlock_mmap_for_io() handle the VMA lock correctly, we make fault_dirty_shared_page() safe to be called without the mmap lock held. Link: https://lkml.kernel.org/r/20230812002033.1002367-1-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Reported-by: David Hildenbrand Tested-by: Suren Baghdasaryan Signed-off-by: Andrew Morton --- mm/internal.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/internal.h~mm-allow-fault_dirty_shared_page-to-be-called-under-the-vma-lock +++ a/mm/internal.h @@ -706,7 +706,7 @@ static inline struct file *maybe_unlock_ if (fault_flag_allow_retry_first(flags) && !(flags & FAULT_FLAG_RETRY_NOWAIT)) { fpin = get_file(vmf->vma->vm_file); - mmap_read_unlock(vmf->vma->vm_mm); + release_fault_lock(vmf); } return fpin; } _ Patches currently in -mm which might be from willy@infradead.org are mm-memoryc-fix-mismerge.patch mm-drop-per-vma-lock-when-returning-vm_fault_retry-or-vm_fault_completed-fix.patch zswap-make-zswap_store-take-a-folio.patch memcg-convert-get_obj_cgroup_from_page-to-get_obj_cgroup_from_folio.patch swap-remove-some-calls-to-compound_head-in-swap_readpage.patch zswap-make-zswap_load-take-a-folio.patch mm-improve-the-comment-in-isolate_migratepages_block.patch minmax-add-in_range-macro.patch mm-convert-page_table_check_pte_set-to-page_table_check_ptes_set.patch mm-add-generic-flush_icache_pages-and-documentation.patch mm-add-folio_flush_mapping.patch mm-remove-arch_implements_flush_dcache_folio.patch mm-add-default-definition-of-set_ptes.patch alpha-implement-the-new-page-table-range-api.patch arc-implement-the-new-page-table-range-api.patch arm-implement-the-new-page-table-range-api.patch arm64-implement-the-new-page-table-range-api.patch csky-implement-the-new-page-table-range-api.patch hexagon-implement-the-new-page-table-range-api.patch ia64-implement-the-new-page-table-range-api.patch ia64-implement-the-new-page-table-range-api-fix.patch loongarch-implement-the-new-page-table-range-api.patch m68k-implement-the-new-page-table-range-api.patch microblaze-implement-the-new-page-table-range-api.patch mips-implement-the-new-page-table-range-api.patch nios2-implement-the-new-page-table-range-api.patch openrisc-implement-the-new-page-table-range-api.patch parisc-implement-the-new-page-table-range-api.patch powerpc-implement-the-new-page-table-range-api.patch powerpc-implement-the-new-page-table-range-api-fix.patch riscv-implement-the-new-page-table-range-api.patch s390-implement-the-new-page-table-range-api.patch sh-implement-the-new-page-table-range-api.patch sparc32-implement-the-new-page-table-range-api.patch sparc64-implement-the-new-page-table-range-api.patch um-implement-the-new-page-table-range-api.patch x86-implement-the-new-page-table-range-api.patch xtensa-implement-the-new-page-table-range-api.patch mm-remove-page_mapping_file.patch mm-rationalise-flush_icache_pages-and-flush_icache_page.patch mm-tidy-up-set_ptes-definition.patch mm-use-flush_icache_pages-in-do_set_pmd.patch mm-call-update_mmu_cache_range-in-more-page-fault-handling-paths.patch mm-allow-fault_dirty_shared_page-to-be-called-under-the-vma-lock.patch