From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=115.124.30.133 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793932673; b=ghHTbchrmAqF97OjCCCkrsYVtNcqDRrkAtBG9Es5YitgNLwAwtqMkagffOK2hsE0f0Ve om/hb8ohX41+gJzTZO/5QJ/+82dkq96Q3a0XuMiZIUL9tSNShvKoqwn1wfSzSLET+81nr jd4Z1lpp98fK/tUk2F0gCfem1BRlKFJFDc+zfz49+q4tojg3umDm6NC9Swzd2Hr00U91e TPXQn+mtmiE0RItbnLoB0nlBpMoZfirPIa9WdS9ORqoRbfG8rS8O8KtfqzpVHEoGEncE9 2xJnBf1z+WS/L3o7wq94sT8K2mcd1A/VlGQYfPsDlEdEg0b9in3V5tpB8bmGIRNhPow== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793932673; h=DMARC-Filter:DKIM-Signature:X-Alimail-AntiSpam:Received:Message-ID: Date:MIME-Version:User-Agent:Subject:To:Cc:References:From: In-Reply-To:Content-Type:Content-Transfer-Encoding; bh=VHeH0IW/I0H82vbyYEbCANX2fIPlHkjru1hf4L33oJk=; b=32xv/9AUnG8gbG9edt1oUFl22uJxG2w3yeRATYfvD4f3UItDWE0/ZxrBBx+lWBB3b3FW 1AQ99b/OYhlBuYGZ4h8Iehg+3UjxroFKlXZmjDMlkkUdHhJPty3Z2xCRIikeBsHFs5Zgz 0MJuy43o+nvj5FQF6vljrKu7Dt+wVdm/ZTA+OAcIy27fceWzn6o9r/+jZ3mW3JX4aiOM9 b9/u5MNujiL2AkRgYRhIAn350pcdR5zErd7v3XJsoaoHTxNZ5YyRrSSMPQz81XxyloCAl 3/RIE2//SHXX1xjR9DXFPLdX0ayF9yiP3oNP3uE0Cp4UdJn3szXvLsnYhAzn3BWjhYw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=bGuAwZXj; arc=none smtp.remote-ip=115.124.30.133 Received: from out30-133.freemail.mail.aliyun.com (out30-133.freemail.mail.aliyun.com [115.124.30.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EC63D606A326; Fri, 6 Nov 2026 02:37:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org EC63D606A326 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=bGuAwZXj DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1793932668; h=Message-ID:Date:MIME-Version:Subject:To:From:Content-Type; bh=VHeH0IW/I0H82vbyYEbCANX2fIPlHkjru1hf4L33oJk=; b=bGuAwZXj6Ioko+pA3aD2Ps1kMh33MvTko6TZoxa/v9GDROZ2ashlQevxgJK7ccP5WkP6GnL+RU9rnP+7cd5freTbEx43SqOWn2TPDeHOEzw/Z7oU/GtBH3Dzn6LkxaCow7hgwzs0psZON6wytF3R/WYzuHC6j7Aazn6JOS02Ij8= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033032089153;MF=baolin.wang@linux.alibaba.com;NM=1;PH=DS;RN=17;SR=0;TI=SMTPD_---0XEA2RB4_1793932666; Received: from 30.74.144.130(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0XEA2RB4_1793932666 cluster:ay36) by smtp.aliyun-inc.com; Fri, 06 Nov 2026 10:37:47 +0800 Message-ID: <58530883-4b3e-4e6c-aec7-4e551cba608d@linux.alibaba.com> Date: Fri, 6 Nov 2026 10:37:45 +0800 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] selftests/mm: skip split_huge_page_test without the split_huge_pages file To: Sasha Levin , Andrew Morton Cc: David Hildenbrand , Zi Yan , Lorenzo Stoakes , "Liam R . Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , Kiryl Shutsemau , Shuah Khan , linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org References: <20261105030242.1241448-1-sashal@kernel.org> From: Baolin Wang In-Reply-To: <20261105030242.1241448-1-sashal@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 11/5/26 11:02 AM, Sasha Levin wrote: > Every case in split_huge_page_test goes through > /sys/kernel/debug/split_huge_pages. When that file does not exist, > because debugfs is not mounted or the kernel has no CONFIG_DEBUG_FS, the > first write bails out of the whole test and it is reported as a failure: > > Bail out! write_file(/sys/kernel/debug/split_huge_pages): No such file or directory > > Skip the test in that case. > > Fixes: fa6c02315f74 ("mm: huge_memory: a new debugfs interface for splitting THP tests") > Signed-off-by: Sasha Levin > --- Reviewed-by: Baolin Wang