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 646392918CF; Mon, 14 Apr 2025 13:28:21 +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=1744637301; cv=none; b=laVnbJ+gwI0ttnD7gS6WhiBIvq8wPshvUS4O7RVA73tKido6pubAPCGt+FOmaCy96EsHS5tWpsryHC74K12jBxSFIAlPUvkiEyIUjCtYNUUgbx9SuqaQGYA6dK/KJPYINxPq5sRmbrPyoKLNVfLnOdDSRbEzTs42m2q7wgbyqGE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744637301; c=relaxed/simple; bh=xNnRKoQXxRlOLWE/k0GpBF6IO5Qx9pRJo8np+CxFsKM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=nMZNYx1pR4ltjFxWvcZc2VhqTBbK1DIfk5D9ypyotddBjiUJO+yuJ8CJQ35htPpGNzL7eEX/MBZanmSriQcA/bLDpvZwottd5ygRsyTQKjpn/HT8OLsu5Zn5YsrVTvNzX8mOUP1jVa+9plsCll18ffjfCSiN/oJeIWMsomJKyOU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fdVlHXv0; 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="fdVlHXv0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1E52FC4CEE2; Mon, 14 Apr 2025 13:28:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744637301; bh=xNnRKoQXxRlOLWE/k0GpBF6IO5Qx9pRJo8np+CxFsKM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fdVlHXv0XAtvjQ3rSn968WQ46Lkp23VcgFPFHtj7HDNVevNtiMsUe9Jq4GWD7ENvS vKIXjr3yvgoFHVLCb8ws8/v8Iwis1Pts/Lj0M0E9nH3TXKo7kSvk6Vvm9UCVX8H4P+ ZT2oZpQudscgvJuJUsIjljoPvc2Q4Vo8fR2h+oc/7jWIHQdmHzsyN2eqJl6VgMzVlx VCZb9Ylv9ZDo+qghLstadm71EITcrvsK4K2s8H/1FpGYpsws3NqYcD7vuH8Obik3Tp ezvIZFxQ8xcFZ0iTrLIAeNlNVqtBR6AHC97Z3k/vROAod9BB7TKzEndyKwBqM3dnwC pBq1boFwtrBTg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Qiuxu Zhuo , Yi Lai , Shuah Khan , Sasha Levin , shuah@kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH AUTOSEL 6.13 22/34] selftests/mincore: Allow read-ahead pages to reach the end of the file Date: Mon, 14 Apr 2025 09:27:16 -0400 Message-Id: <20250414132729.679254-22-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250414132729.679254-1-sashal@kernel.org> References: <20250414132729.679254-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.13.11 Content-Transfer-Encoding: 8bit From: Qiuxu Zhuo [ Upstream commit 197c1eaa7ba633a482ed7588eea6fd4aa57e08d4 ] When running the mincore_selftest on a system with an XFS file system, it failed the "check_file_mmap" test case due to the read-ahead pages reaching the end of the file. The failure log is as below: RUN global.check_file_mmap ... mincore_selftest.c:264:check_file_mmap:Expected i (1024) < vec_size (1024) mincore_selftest.c:265:check_file_mmap:Read-ahead pages reached the end of the file check_file_mmap: Test failed FAIL global.check_file_mmap This is because the read-ahead window size of the XFS file system on this machine is 4 MB, which is larger than the size from the #PF address to the end of the file. As a result, all the pages for this file are populated. blockdev --getra /dev/nvme0n1p5 8192 blockdev --getbsz /dev/nvme0n1p5 512 This issue can be fixed by extending the current FILE_SIZE 4MB to a larger number, but it will still fail if the read-ahead window size of the file system is larger enough. Additionally, in the real world, read-ahead pages reaching the end of the file can happen and is an expected behavior. Therefore, allowing read-ahead pages to reach the end of the file is a better choice for the "check_file_mmap" test case. Link: https://lore.kernel.org/r/20250311080940.21413-1-qiuxu.zhuo@intel.com Reported-by: Yi Lai Signed-off-by: Qiuxu Zhuo Signed-off-by: Shuah Khan Signed-off-by: Sasha Levin --- tools/testing/selftests/mincore/mincore_selftest.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/tools/testing/selftests/mincore/mincore_selftest.c b/tools/testing/selftests/mincore/mincore_selftest.c index e949a43a61450..efabfcbe0b498 100644 --- a/tools/testing/selftests/mincore/mincore_selftest.c +++ b/tools/testing/selftests/mincore/mincore_selftest.c @@ -261,9 +261,6 @@ TEST(check_file_mmap) TH_LOG("No read-ahead pages found in memory"); } - EXPECT_LT(i, vec_size) { - TH_LOG("Read-ahead pages reached the end of the file"); - } /* * End of the readahead window. The rest of the pages shouldn't * be in memory. -- 2.39.5