From patchwork Thu Jul 11 13:32:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Drobyshev X-Patchwork-Id: 13730733 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AE6B2C3DA41 for ; Thu, 11 Jul 2024 13:34:16 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sRtus-0004rN-0J; Thu, 11 Jul 2024 09:32:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sRtup-0004jc-V8; Thu, 11 Jul 2024 09:32:56 -0400 Received: from relay.virtuozzo.com ([130.117.225.111]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sRtul-00034J-9y; Thu, 11 Jul 2024 09:32:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=virtuozzo.com; s=relay; h=MIME-Version:Message-Id:Date:Subject:From: Content-Type; bh=wNiQ3C1oGxdSfTWhqpAGz0OkDU2T3/U7NR1jQ5Ua/cU=; b=h2paJzPXKkef 7RsordnF1EPs6r0+gsq8l2JG8fBxpKlPpktnP/ndpYI/h0qxaRESWAY8w2RUhFxyEekSlDH0cZE4/ gU28Qr2DA7H37AIVooqfE+5u25qwq8bidIzMifgiQ5ZAXAl4SmIOVshQRgA3o9zlKrBLuFkuQcSeR /o8eJsk6CSoEn9htPM5JivZVVgTWjTRWg38yDULIv3RCM8UtguA+iLpiuK5KGSU5pEtQTJKoR1ct/ B8sSzwyTHkx6nOcSQSnK/JWUUNuIlsqyd5QhOHe/zhemaw6eoD+HXKkV9U7MJT5eej2Ei+JRWMamN QtPBu44vokBeovKEpxP2EQ==; Received: from [130.117.225.1] (helo=dev005.ch-qa.vzint.dev) by relay.virtuozzo.com with esmtp (Exim 4.96) (envelope-from ) id 1sRtty-00CZ6M-0w; Thu, 11 Jul 2024 15:32:42 +0200 From: Andrey Drobyshev To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, hreitz@redhat.com, kwolf@redhat.com, vsementsov@yandex-team.ru, pbonzini@redhat.com, eesposit@redhat.com, andrey.drobyshev@virtuozzo.com, den@virtuozzo.com Subject: [PATCH 2/2] iotests/298: add testcase for async writes with preallocation filter Date: Thu, 11 Jul 2024 16:32:42 +0300 Message-Id: <20240711133242.251061-3-andrey.drobyshev@virtuozzo.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20240711133242.251061-1-andrey.drobyshev@virtuozzo.com> References: <20240711133242.251061-1-andrey.drobyshev@virtuozzo.com> MIME-Version: 1.0 Received-SPF: pass client-ip=130.117.225.111; envelope-from=andrey.drobyshev@virtuozzo.com; helo=relay.virtuozzo.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The testcase simply creates a 64G image with 1M clusters, generates a list of 1M aligned offsets and feeds aio_write commands with those offsets to qemu-io run with '--aio native --nocache'. Then we check the data written at each of the offsets. Before the previous commit this could result into a race within the preallocation filter which would zeroize some clusters after actually writing data to them. Note: the test doesn't fail in 100% cases as there's a race involved, but the failures are pretty consistent so it should be good enough for detecting the problem. Signed-off-by: Andrey Drobyshev --- tests/qemu-iotests/298 | 34 ++++++++++++++++++++++++++++++++++ tests/qemu-iotests/298.out | 4 ++-- 2 files changed, 36 insertions(+), 2 deletions(-) diff --git a/tests/qemu-iotests/298 b/tests/qemu-iotests/298 index 09c9290711..d1bf5ee0df 100755 --- a/tests/qemu-iotests/298 +++ b/tests/qemu-iotests/298 @@ -20,8 +20,10 @@ import os import iotests +import random MiB = 1024 * 1024 +GiB = MiB * 1024 disk = os.path.join(iotests.test_dir, 'disk') overlay = os.path.join(iotests.test_dir, 'overlay') refdisk = os.path.join(iotests.test_dir, 'refdisk') @@ -176,5 +178,37 @@ class TestTruncate(iotests.QMPTestCase): self.do_test('off', '150M') +class TestPreallocAsyncWrites(iotests.QMPTestCase): + def setUp(self): + # Make sure we get reproducible write patterns on each run + random.seed(42) + iotests.qemu_img_create('-f', iotests.imgfmt, disk, '-o', + f'cluster_size={MiB},lazy_refcounts=on', + str(64 * GiB)) + + def tearDown(self): + os.remove(disk) + + def test_prealloc_async_writes(self): + requests = 1024 # Number of write/read requests to feed to qemu-io + total_clusters = 64 * 1024 # 64G / 1M + + offsets = random.sample(range(0, total_clusters), requests) + aio_write_cmds = [f'aio_write -P 0xaa {off}M 1M' for off in offsets] + read_cmds = [f'read -P 0xaa {off}M 1M' for off in offsets] + + proc = iotests.QemuIoInteractive('--aio', 'native', '--nocache', + '--image-opts', drive_opts) + for cmd in aio_write_cmds: + proc.cmd(cmd) + proc.close() + + proc = iotests.QemuIoInteractive('-f', iotests.imgfmt, disk) + for cmd in read_cmds: + out = proc.cmd(cmd) + self.assertFalse('Pattern verification failed' in str(out)) + proc.close() + + if __name__ == '__main__': iotests.main(supported_fmts=['qcow2'], required_fmts=['preallocate']) diff --git a/tests/qemu-iotests/298.out b/tests/qemu-iotests/298.out index fa16b5ccef..6323079e08 100644 --- a/tests/qemu-iotests/298.out +++ b/tests/qemu-iotests/298.out @@ -1,5 +1,5 @@ -............. +.............. ---------------------------------------------------------------------- -Ran 13 tests +Ran 14 tests OK