From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 3D86B606C579 for ; Tue, 3 Nov 2026 11:27:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20260707 header.b=l7Z4J1qm Received: by kanga.kvack.org (Postfix) id 5E00A6B05B4; Tue, 3 Nov 2026 06:27:34 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 5A8716B05B6; Tue, 3 Nov 2026 06:27:34 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4A5BA6B05B7; Tue, 3 Nov 2026 06:27:34 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 280496B05B4 for ; Tue, 3 Nov 2026 06:27:34 -0500 (EST) Received: from smtpin09.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 9BB20140381 for ; Tue, 3 Nov 2026 11:27:33 +0000 (UTC) X-FDA: 85393582386.09.132D8FD Received: from mail-wr1-f50.google.com (mail-wr1-f50.google.com [209.85.221.50]) by imf10.hostedemail.com (Postfix) with ESMTP id B9743C0007 for ; Tue, 3 Nov 2026 11:27:31 +0000 (UTC) Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=gmail.com header.s=20260707 header.b=l7Z4J1qm; spf=pass (imf10.hostedemail.com: domain of azpijr@gmail.com designates 209.85.221.50 as permitted sender) smtp.mailfrom=azpijr@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1793705251; b=Pr+b8pRGK2lrdR/hqpeI5tTspdnDzS02LmcngA9hacfoHrYir3yLgdmpbSbdqP0dyN5txH +jR0WvIvNCmR/F0zyBbnP2xp41nx1Nhpz0odTdNJ9Bb4DsIIMZlm2bATGwVlfDIsPQIF4v h6rL2RgNsn4E7QTm2JBnpJCoMeyqLXc= ARC-Authentication-Results: i=1; imf10.hostedemail.com; dkim=pass header.d=gmail.com header.s=20260707 header.b=l7Z4J1qm; spf=pass (imf10.hostedemail.com: domain of azpijr@gmail.com designates 209.85.221.50 as permitted sender) smtp.mailfrom=azpijr@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1793705251; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=y+euFfAeQxWkS5ASGGavFVBTLjPaa5ivYg3I8FV3VAA=; b=rUrfzqwG4emKw0sCu3YOGkiTyIRxirGlmqN8QUeeakMIbVXK7Hy6dL5G0VP7I5vWK60Em3 /LlfQ3cdn7vRuG1C2dwoT71O7SxqJYOfFsHz69bIdEgRP6AKqG+HP84UQQXtvB61or/mo2 K3ZZmFL1ypB6C21uTWPS1uG7rQAVKRk= Received: by mail-wr1-f50.google.com with SMTP id ffacd0b85a97d-48df0fa43c5so376234f8f.0 for ; Tue, 03 Nov 2026 03:27:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20260707; t=1793705250; x=1794310050; darn=kvack.org; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to :content-type; bh=y+euFfAeQxWkS5ASGGavFVBTLjPaa5ivYg3I8FV3VAA=; b=l7Z4J1qmE5f6sNdCXpcsPGnszF3+nUkK1uil4HM8ZD3mz0ovDvp51vCsrGZd2er9KU 8U+XPgHzYzQO9E04OtosoJfj+NSV4aAj/ow+Z01eGDFCUfpbL6PL6NmSfRL1xH6F/p4h L241FOO9hsEg+UYkUJ+xqXZ8aF6ZqturyaYUo8GsTQ7Hv5J+j129De4NKlq0uaXtqBXG I9yG8kNemYgjArHEymNm52vGmGq5ypMiDKBZ8U8/D+DQWl5wLr2/8VSJs+TAbtoHnuNP NjwSB0YBMQmPfCu8uTGsem2smrQgo3lfy5FcSH8JmR0sZJ+Ee3RJUkoj7jUSts45S8HV oFCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1793705250; x=1794310050; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=y+euFfAeQxWkS5ASGGavFVBTLjPaa5ivYg3I8FV3VAA=; b=blSsw1gStaWZHxR+CH5SYYwr1V0VpwZ8xtKJYyEOqBMbGQ1aVM291vT7fMKaZd9NpV W9EqHSdqTOJU56ojMiN7ZDuSfvj9tQOLPd/gNBzUtSQ0eTONIj7mwUu01GXhq7kHBP5b 746MuQWrhvcPFbtEOyJK1Nsa1dXb4MtC88oSzlxxTQ2Q9Wy+Nu1CwQxjccllNRAKAboT fTKWxfZfztzgFfnUf4mp/Z0VB441Sb62ZwnEATrHOwUIs0nQWg1lWetFQw/lGOtqMNoo 2jAFRm/XcMpG9nubv/CPH2Jw7Uo9wOjmDNuprv98lRs1cn3NJOo03XNiQQecapHkFo9a R/tg== X-Forwarded-Encrypted: i=1; AKwUvBxQT3+8P8B2UY0MeuNJRtHuwm66qgFaaK7onJp2oNWeZ4recuoZadswLVw68PmMCI0Otsnu+AvJ2g==@kvack.org X-Gm-Message-State: APuU4Z+2LoUz0NzBCCZm5HWGPFPEa1WcwbZsBYU6ugeUekAX6lJ3Ahr4 ccDRcCSdU9jYxFOV6J79HjOKCaY3csY5Z3Idr3CNvbwhNTdlm74mvK3N X-Gm-Gg: AYBFou1s6tXoDvTOpMyd2Kzpp2hgwBe1A9GOWNQVsRqxTrsZ+lQknPpyprijltUkS91 OnVBa2q2IcDNP4+XdcIb5IAxFizpANM3w6HVZJs/M6Fk9SeA5Qw8VpM3w3HTDI3K1guBv2EEeyC 0c8gu9UfEwS/CuwkvRGOjAyZG75KGy1e+YWqBLTvaGb9FxaQDqzkAN33Tg8A1YTh8AVjPXrK76y stcKpH0O1RNlJiAFFBV3j9oyEFRnjvO9eDQedpkGLmdt11DlKGtnLuKDCqVSs++V+DLPUdfeWmf LOPUePVLE5M49Ib1QFVqTxZ/DPfjS4rSkSAdgyHEL9Pvl0K6dCR9ZnKP6D7iG41gkV+Rv4sEvwf MsBfJagtVShK/HfoqBlCuXeMpECprbf8kP/+MxChMPgbEUfD4kFzQMYkEH8Ir4XyVsBrVBP90kz CUgMo0tS5Ql4v2wWSPsr/Nwz3WciugoK1WElvkuJFGXmMMGsoX2fBV7k7jTsIugknSnovBEjkQF snynLxnKILMXFUaPWA+/4I6rWT/HBBu0tHYiTZ3QPF85e4z3kQt8k1g3wGZPJnt2/wKbSbQP+uE pd1ipIWxMoNAEWaiHFGc4L4= X-Received: by 2002:a5d:584a:0:b0:48e:7833:2e7b with SMTP id ffacd0b85a97d-48e7833329bmr23687518f8f.1.1793705250147; Tue, 03 Nov 2026 03:27:30 -0800 (PST) Received: from [192.168.1.22] ([83.231.69.9]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48e71b8a84esm26678645f8f.39.2026.11.03.03.27.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 03 Nov 2026 03:27:29 -0800 (PST) Message-ID: Date: Tue, 3 Nov 2026 12:27:28 +0100 X-Archived-By: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 5/5] selftests/mm: test mremap() with an old size of 0 To: Josef Bacik , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , David Hildenbrand Cc: Vlastimil Babka , Jann Horn , Pedro Falcato , Muchun Song , Oscar Salvador , linux-mm@kvack.org References: <20261102-b4-mremap-pre-split-v2-0-d281dd11ad7d@toxicpanda.com> <20261102-b4-mremap-pre-split-v2-5-d281dd11ad7d@toxicpanda.com> Content-Language: en-US From: "Jose A. Perez de Azpillaga" In-Reply-To: <20261102-b4-mremap-pre-split-v2-5-d281dd11ad7d@toxicpanda.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-8.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FORGED_GMAIL_RCVD,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: B9743C0007 X-Stat-Signature: 6a35jcoy5a7i8qe3e1x3n1uih8h6habs X-Rspam-User: X-HE-Tag: 1793705251-169997 X-HE-Meta: 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 LUopbvGm 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On 11/3/26 12:46 AM, Josef Bacik wrote: > mremap() with an old size of 0 duplicates a shared mapping, and mremap_test > has no case for it. > > Duplicate a shared anonymous mapping, once from its start and once from the > middle. Check that the source and the duplicate are mapped by one VMA each > and that they show the same pages. > > Signed-off-by: Josef Bacik > > Acked-by: Lorenzo Stoakes (ARM) LGTM: Reviewed-by: Jose A. Perez de Azpillaga -- cheers, jose a. p-a