From patchwork Tue Mar 23 18:25:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brian Geffon X-Patchwork-Id: 12159001 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0CAADC433E0 for ; Tue, 23 Mar 2021 18:25:41 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id ABCF86148E for ; Tue, 23 Mar 2021 18:25:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ABCF86148E Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 377BE6B0286; Tue, 23 Mar 2021 14:25:40 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2FE0E6B0288; Tue, 23 Mar 2021 14:25:40 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F36756B0289; Tue, 23 Mar 2021 14:25:39 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id D20DB6B0286 for ; Tue, 23 Mar 2021 14:25:39 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 97BC3180AD5C5 for ; Tue, 23 Mar 2021 18:25:39 +0000 (UTC) X-FDA: 77951967198.08.BD35AFD Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) by imf04.hostedemail.com (Postfix) with ESMTP id D161F3C1 for ; Tue, 23 Mar 2021 18:25:37 +0000 (UTC) Received: by mail-pf1-f201.google.com with SMTP id x197so2674637pfc.18 for ; Tue, 23 Mar 2021 11:25:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=XqDxfe4GGK69zvJtB/kYAUp+QZJt4kx+lv6J7Sr9tRs=; b=pmX4m2+lbq8wnS3lDGZpOiVbrBKH9GZtNYepLlpUhILycXMuqeBz3snMC85G7kSa3Z 0trYrBGz1Ox/zg4rWqDN8q2a6uuaE/o3qj9T8eNhGxbFlk2H4OH740cB4ZX/7ul7r8+R vN+S0vS8w3q0modfq8gt5cRopIK7WH6SHLg3HufwOlaBEIQ5U499dUYeOTkKTO7UIH9p plGtyf9P+aH9ogIuDl9ic2r4iouA+ocbS+zhhg6rfLoBEJU62JoB+AY/jKGf5FXXQgpc dl+QM4f/C6UPjj7xhpJ8HKMaghCv3XC4+B4xUwLR83CUJZvmciW8GDUZjZ9SI50a7rgp SEYA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=XqDxfe4GGK69zvJtB/kYAUp+QZJt4kx+lv6J7Sr9tRs=; b=ME8LI6/PcLcGwAiF75zko+0DK+paOl/45Tt3HlHfzDTtTWv+lRXSStDmpo4m6bn6CH GpbfqZOY5bynZjxkFiO4zsk/b/PHkgbmnZrpJt2dnHkHx/xIymyJOy/YHpSJLcp90oiV 5pAoq3WbQ+D+/GkAXHUeaA6yYeAfeZfTvvvuVLdG0LOy79D4h/f4amDlZ9SJFyG1jHho 2Jj2YY6R8+A25wIbtd4V6lleo7I14Jp2Dd7xtoGYUjPlOj5zc4G4IlCbCW1RekTdMCAm +RMVl30n4Xj5D1eMwCXXB5b3uvRUN+WT5RdlWYUgWz9e6aPMrnl71IasJiUDhI4QILVQ +I4A== X-Gm-Message-State: AOAM5326F4P39sgHwFoowbcLKrmhJ9dBQD9lc+B3L7GkR1LmFk/ik4nP dlvs5QjY9o0VF0gHcHdnWB1L/FDrx4vk X-Google-Smtp-Source: ABdhPJw89EMS2/MQ8wDqH2rLOe3CHbpDkSo8Pn93HIvJ3T4TR1ONMKvTuAoGolSWr3Iia5mN69ivSciAdNzW X-Received: from bg.sfo.corp.google.com ([2620:15c:8:10:b047:e98d:2134:b4dd]) (user=bgeffon job=sendgmr) by 2002:aa7:9493:0:b029:1f8:a493:b747 with SMTP id z19-20020aa794930000b02901f8a493b747mr5851808pfk.41.1616523938296; Tue, 23 Mar 2021 11:25:38 -0700 (PDT) Date: Tue, 23 Mar 2021 11:25:20 -0700 In-Reply-To: <20210323182520.2712101-1-bgeffon@google.com> Message-Id: <20210323182520.2712101-4-bgeffon@google.com> Mime-Version: 1.0 References: <20210303175235.3308220-1-bgeffon@google.com> <20210323182520.2712101-1-bgeffon@google.com> X-Mailer: git-send-email 2.31.0.291.g576ba9dcdaf-goog Subject: [PATCH] mremap.2: MREMAP_DONTUNMAP to reflect to supported mappings From: Brian Geffon To: Andrew Morton Cc: Axel Rasmussen , Lokesh Gidra , Mike Rapoport , Peter Xu , Hugh Dickins , "Michael S . Tsirkin" , Brian Geffon , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andy Lutomirski , Vlastimil Babka , Andrea Arcangeli , Sonny Rao , Minchan Kim , "Kirill A . Shutemov" , Dmitry Safonov , Michael Kerrisk , Alejandro Colomar X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: D161F3C1 X-Stat-Signature: orurb1qoahbzpd5jot5nznfoxksn84gf Received-SPF: none (flex--bgeffon.bounces.google.com>: No applicable sender policy available) receiver=imf04; identity=mailfrom; envelope-from="<3ojJaYAcKCHkYdbcclkdlldib.Zljifkru-jjhsXZh.lod@flex--bgeffon.bounces.google.com>"; helo=mail-pf1-f201.google.com; client-ip=209.85.210.201 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1616523937-124426 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: mremap(2) now supports MREMAP_DONTUNMAP with mapping types other than private anonymous. Signed-off-by: Brian Geffon --- man2/mremap.2 | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) diff --git a/man2/mremap.2 b/man2/mremap.2 index 3ed0c0c0a..72acbc111 100644 --- a/man2/mremap.2 +++ b/man2/mremap.2 @@ -118,16 +118,6 @@ This flag, which must be used in conjunction with remaps a mapping to a new address but does not unmap the mapping at .IR old_address . .IP -The -.B MREMAP_DONTUNMAP -flag can be used only with private anonymous mappings -(see the description of -.BR MAP_PRIVATE -and -.BR MAP_ANONYMOUS -in -.BR mmap (2)). -.IP After completion, any access to the range specified by .IR old_address @@ -227,7 +217,8 @@ was specified, but one or more pages in the range specified by .IR old_address and .IR old_size -were not private anonymous; +were part of a special mapping or the mapping is one that +does not support merging or expanding; .IP * .B MREMAP_DONTUNMAP was specified and