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 AF3D4C43217 for ; Tue, 18 Oct 2022 00:46:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229675AbiJRAqb (ORCPT ); Mon, 17 Oct 2022 20:46:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229909AbiJRAqa (ORCPT ); Mon, 17 Oct 2022 20:46:30 -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 7E4261E702 for ; Mon, 17 Oct 2022 17:46:28 -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 F2F0F612FA for ; Tue, 18 Oct 2022 00:46:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5015CC433D6; Tue, 18 Oct 2022 00:46:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1666053987; bh=qAx4CvjL9cfuejCgZx9v9etM2lbL3Upuho/ewAa5i1I=; h=Date:To:From:Subject:From; b=mGcyq1fKNur0R1kpE9KwIbBdJfFSWnIgEJKICpjYSlJR1SNvXOeniNTLC0t22u0zz tvn11NZXUA40dTBb7e4prRI8ZZTMAvtVzR6GkDUjKvuZcT2EHBxEOLLqQkoW6ACizc 8DwnHihxE8Wzhz+aSXiKsVIapmX17SdDITdD6wU4= Date: Mon, 17 Oct 2022 17:46:26 -0700 To: mm-commits@vger.kernel.org, willy@infradead.org, vbabka@suse.cz, shuah@kernel.org, peterx@redhat.com, jhubbard@nvidia.com, jgg@nvidia.com, hughd@google.com, aarcange@redhat.com, david@redhat.com, akpm@linux-foundation.org From: Andrew Morton Subject: + mm-pagewalk-add-walk_page_range_vma.patch added to mm-unstable branch Message-Id: <20221018004627.5015CC433D6@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/pagewalk: add walk_page_range_vma() has been added to the -mm mm-unstable branch. Its filename is mm-pagewalk-add-walk_page_range_vma.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-pagewalk-add-walk_page_range_vma.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: David Hildenbrand Subject: mm/pagewalk: add walk_page_range_vma() Date: Fri, 30 Sep 2022 16:19:29 +0200 Let's add walk_page_range_vma(), which is similar to walk_page_vma(), however, is only interested in a subset of the VMA range. To be used in KSM code to stop using follow_page() next. Link: https://lkml.kernel.org/r/20220930141931.174362-6-david@redhat.com Signed-off-by: David Hildenbrand Cc: Andrea Arcangeli Cc: Hugh Dickins Cc: Jason Gunthorpe Cc: John Hubbard Cc: Matthew Wilcox Cc: Peter Xu Cc: Shuah Khan Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- include/linux/pagewalk.h | 3 +++ mm/pagewalk.c | 27 +++++++++++++++++++++++++++ 2 files changed, 30 insertions(+) --- a/include/linux/pagewalk.h~mm-pagewalk-add-walk_page_range_vma +++ a/include/linux/pagewalk.h @@ -99,6 +99,9 @@ int walk_page_range_novma(struct mm_stru unsigned long end, const struct mm_walk_ops *ops, pgd_t *pgd, void *private); +int walk_page_range_vma(struct vm_area_struct *vma, unsigned long start, + unsigned long end, const struct mm_walk_ops *ops, + void *private); int walk_page_vma(struct vm_area_struct *vma, const struct mm_walk_ops *ops, void *private); int walk_page_mapping(struct address_space *mapping, pgoff_t first_index, --- a/mm/pagewalk.c~mm-pagewalk-add-walk_page_range_vma +++ a/mm/pagewalk.c @@ -517,6 +517,33 @@ int walk_page_range_novma(struct mm_stru return walk_pgd_range(start, end, &walk); } +int walk_page_range_vma(struct vm_area_struct *vma, unsigned long start, + unsigned long end, const struct mm_walk_ops *ops, + void *private) +{ + struct mm_walk walk = { + .ops = ops, + .mm = vma->vm_mm, + .vma = vma, + .private = private, + }; + int err; + + if (start >= end || !walk.mm) + return -EINVAL; + if (start < vma->vm_start || end > vma->vm_end) + return -EINVAL; + + mmap_assert_locked(walk.mm); + + err = walk_page_test(start, end, &walk); + if (err > 0) + return 0; + if (err < 0) + return err; + return __walk_page_range(start, end, &walk); +} + int walk_page_vma(struct vm_area_struct *vma, const struct mm_walk_ops *ops, void *private) { _ Patches currently in -mm which might be from david@redhat.com are selftests-vm-add-test-to-measure-madv_unmergeable-performance.patch mm-ksm-simplify-break_ksm-to-not-rely-on-vm_fault_write.patch mm-remove-vm_fault_write.patch mm-ksm-fix-ksm-cow-breaking-with-userfaultfd-wp-via-fault_flag_unshare.patch mm-pagewalk-add-walk_page_range_vma.patch mm-ksm-convert-break_ksm-to-use-walk_page_range_vma.patch mm-gup-remove-foll_migration.patch