From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 450A815B998; Thu, 19 Mar 2026 21:47:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773956821; cv=none; b=L2RETjb13tTxBitAfYljQ1pzdWWUHtjJkyjOHTWRsYKCp2/KGqu+4CzY/o0S1NYxA38G/yShtYcCjb/R/2onCnlKy34T2f7OrH93sFgoLVgx9QUWr1OJNNlD4pS53z5tuwEhwS6W8ktUxENfZeuvzEBkHp0QhmIlhtNNNSLw27w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773956821; c=relaxed/simple; bh=1IBkxxVID0OqECcdtfslaXIofuQKudUDRH508pH5n2M=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=THYk4ZN6sPGCDk/71bDVLEp2DoDYBZfdoDajZns9KYwWK5BuQGVpD2kQLdkHvhi2pCoQ/2BZrqIh8dBTHXQdd9rqOttAW8nZdFLGBOBJnAi4OjYUNPDfXdECsx2YlvHzb/ULxt/aBpvAjoWD0NxcRW8K9jEnqZu0EQifr1jM5Is= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YQKZ4msA; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YQKZ4msA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 245CFC19424; Thu, 19 Mar 2026 21:46:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773956820; bh=1IBkxxVID0OqECcdtfslaXIofuQKudUDRH508pH5n2M=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=YQKZ4msA9Q1UVupgLQQX8vWm3a7QrdO9XU5owvbsusQVdWvjaxArz8Et/bp6ovnOs V4HRFc5TXhTPy+WL9rihFat9A7NxNhUsmKYne7rM0Ij8oDuzhoMr58/+PIR/FYiYD1 dzHjoWQMJ8UnPNd2CVNKGDOaTCL+87qcEGvwEiHNxP7BFDaHZeiEhiHkoDx72Umg2e JudAWOILwmo/e0oIm3hyYcEXKJCYV9HLTcDuZA6yot54xC7QRWgWD/FWZOSXXSQKTB 1MGGDP4CxlwXaGUi+0RRy9CUVPXvDu4C5KsZpNLIMzTnccQi/qlIRdrgJZ3ckpm32d mB7HhYdpglAaQ== Message-ID: Date: Thu, 19 Mar 2026 22:46:53 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 1/5] selftests/mm/guard-regions: skip collapse test when thp not enabled To: Chunyu Hu , akpm@linux-foundation.org, shuah@kernel.org, linux-mm@kvack.org, ljs@kernel.org Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, Li Wang References: <20260319160656.1480279-1-chuhu@redhat.com> <20260319160656.1480279-2-chuhu@redhat.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 3/19/26 17:06, Chunyu Hu wrote: > When thp is not available, just skip the collape tests to avoid the false > negative. > > Without the change, run with a thp disabled kernel: > ./run_vmtests.sh -t madv_guard -n 1 > > # RUN guard_regions.anon.collapse ... > # guard-regions.c:2217:collapse:Expected madvise(ptr, size, MADV_NOHUGEPAGE) (-1) == 0 (0) > # collapse: Test terminated by assertion > # FAIL guard_regions.anon.collapse > not ok 2 guard_regions.anon.collapse > > # RUN guard_regions.shmem.collapse ... > # guard-regions.c:2217:collapse:Expected madvise(ptr, size, MADV_NOHUGEPAGE) (-1) == 0 (0) > # collapse: Test terminated by assertion > # FAIL guard_regions.shmem.collapse > not ok 32 guard_regions.shmem.collapse > > # RUN guard_regions.file.collapse ... > # guard-regions.c:2217:collapse:Expected madvise(ptr, size, MADV_NOHUGEPAGE) (-1) == 0 (0) > # collapse: Test terminated by assertion > # FAIL guard_regions.file.collapse > not ok 62 guard_regions.file.collapse > > # FAILED: 87 / 90 tests passed. > # 17 skipped test(s) detected. Consider enabling relevant config options to improve coverage. > # Totals: pass:70 fail:3 xfail:0 xpass:0 skip:17 error:0 > > With this change, run with thp disabled kernel: > ./run_vmtests.sh -t madv_guard -n 1 > > # RUN guard_regions.anon.collapse ... > # SKIP Transparent Hugepages not available > # OK guard_regions.anon.collapse > ok 2 guard_regions.anon.collapse # SKIP Transparent Hugepages not available > > # RUN guard_regions.file.collapse ... > # SKIP Transparent Hugepages not available > # OK guard_regions.file.collapse > ok 62 guard_regions.file.collapse # SKIP Transparent Hugepages not available > > # RUN guard_regions.shmem.collapse ... > # SKIP Transparent Hugepages not available > # OK guard_regions.shmem.collapse > ok 32 guard_regions.shmem.collapse # SKIP Transparent Hugepages not available > > # PASSED: 90 / 90 tests passed. > # 20 skipped test(s) detected. Consider enabling relevant config options to improve coverage. > # Totals: pass:70 fail:0 xfail:0 xpass:0 skip:20 error:0 > > CC: Li Wang > Signed-off-by: Chunyu Hu Acked-by: David Hildenbrand (Arm) -- Cheers, David