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 CEBC4C77B75 for ; Fri, 12 May 2023 23:01:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240716AbjELXBo (ORCPT ); Fri, 12 May 2023 19:01:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238913AbjELXAu (ORCPT ); Fri, 12 May 2023 19:00:50 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44E16AD03 for ; Fri, 12 May 2023 15:59:43 -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 6AD9161D4E for ; Fri, 12 May 2023 22:59:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C1F73C433D2; Fri, 12 May 2023 22:59:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1683932381; bh=+/SUOygkPqZZOOVvG5rGY9VQQzqZHICiB+m4gBKhW6Q=; h=Date:To:From:Subject:From; b=wCXTrgjB+SAfadFt9GaGvs3IblIjSOImjhqPYuUMj5OWzjuqM3JoSv9U50G3khSbh V1iOr7ZBe+HuFfIxyLvu+gj41PQGMrDCeG19n0n4cbBCymwlKWVfXI/6IlJuDMpne9 T6s6ufv3470xe0LHpsE0BCzDt0cld82Ax8rbUxNk= Date: Fri, 12 May 2023 15:59:41 -0700 To: mm-commits@vger.kernel.org, zhangpeng.00@bytedance.com, vernon2gm@gmail.com, senozhatsky@chromium.org, richard.weiyang@gmail.com, dcb314@hotmail.com, Liam.Howlett@oracle.com, akpm@linux-foundation.org From: Andrew Morton Subject: + mm-avoid-rewalk-in-mmap_region.patch added to mm-unstable branch Message-Id: <20230512225941.C1F73C433D2@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: avoid rewalk in mmap_region has been added to the -mm mm-unstable branch. Its filename is mm-avoid-rewalk-in-mmap_region.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-avoid-rewalk-in-mmap_region.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: "Liam R. Howlett" Subject: mm: avoid rewalk in mmap_region Date: Fri, 12 May 2023 14:20:36 -0400 If the iterator has moved to the previous entry, then step forward one range, back to the gap. Link: https://lkml.kernel.org/r/20230512182036.359030-36-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett Cc: David Binderman Cc: Peng Zhang Cc: Sergey Senozhatsky Cc: Vernon Yang Cc: Wei Yang Signed-off-by: Andrew Morton --- mm/mmap.c | 3 +++ 1 file changed, 3 insertions(+) --- a/mm/mmap.c~mm-avoid-rewalk-in-mmap_region +++ a/mm/mmap.c @@ -2643,6 +2643,9 @@ unsigned long mmap_region(struct file *f } cannot_expand: + if (prev) + vma_iter_next_range(&vmi); + /* * Determine the object being mapped and call the appropriate * specific mapper. the address has already been validated, but _ Patches currently in -mm which might be from Liam.Howlett@oracle.com are maple_tree-fix-static-analyser-cppcheck-issue.patch maple_tree-avoid-unnecessary-ascending.patch maple_tree-clean-up-mas_dfs_postorder.patch maple_tree-add-debug-bug_on-and-warn_on-variants.patch maple_tree-use-mas_bug_on-when-setting-a-leaf-node-as-a-parent.patch maple_tree-use-mas_bug_on-in-mas_set_height.patch maple_tree-use-mas_bug_on-from-mas_topiary_range.patch maple_tree-use-mas_wr_bug_on-in-mas_store_prealloc.patch maple_tree-use-mas_bug_on-prior-to-calling-mas_meta_gap.patch maple_tree-return-error-on-mte_pivots-out-of-range.patch maple_tree-make-test-code-work-without-debug-enabled.patch mm-update-validate_mm-to-use-vma-iterator.patch mm-update-vma_iter_store-to-use-mas_warn_on.patch maple_tree-add-__init-and-__exit-to-test-module.patch maple_tree-remove-unnecessary-check-from-mas_destroy.patch maple_tree-mas_start-reset-depth-on-dead-node.patch mm-mmap-change-do_vmi_align_munmap-for-maple-tree-iterator-changes.patch maple_tree-try-harder-to-keep-active-node-after-mas_next.patch maple_tree-try-harder-to-keep-active-node-with-mas_prev.patch maple_tree-revise-limit-checks-in-mas_empty_area_rev.patch maple_tree-fix-testing-mas_empty_area.patch maple_tree-introduce-mas_next_slot-interface.patch maple_tree-add-mas_next_range-and-mas_find_range-interfaces.patch maple_tree-relocate-mas_rewalk-and-mas_rewalk_if_dead.patch maple_tree-introduce-mas_prev_slot-interface.patch maple_tree-add-mas_prev_range-and-mas_find_range_rev-interface.patch maple_tree-clear-up-index-and-last-setting-in-single-entry-tree.patch maple_tree-update-testing-code-for-mas_nextprevwalk.patch mm-add-vma_iter_nextprev_range-to-vma-iterator.patch mm-avoid-rewalk-in-mmap_region.patch