From patchwork Thu Sep 29 04:19:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naohiro Aota X-Patchwork-Id: 12993492 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8C93DC6FA83 for ; Thu, 29 Sep 2022 04:19:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234722AbiI2ET4 (ORCPT ); Thu, 29 Sep 2022 00:19:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47646 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234714AbiI2ETv (ORCPT ); Thu, 29 Sep 2022 00:19:51 -0400 Received: from esa4.hgst.iphmx.com (esa4.hgst.iphmx.com [216.71.154.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F8231EC46; Wed, 28 Sep 2022 21:19:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1664425187; x=1695961187; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=0JH3GMR8KnyJIr6tVnX+jJCsb34kydBxYqQxm+iuchI=; b=JGIkQ3zCrgJEMfrwT2zX795byR2teUTiRr3pMvki3Dp/H2js+siVjQu1 GnnvKoAVIVD/dHRvDi2zdKi3+MO+XpaH/TITDfJP0gzfuA9Qcm7NS/PLe NRCdCUCt5gSH/n5i4kv0dAkyXE7Jy/XWAh2dC0KwPUFf6eiZdkjOgQWVx OYJ/d5Aqr6dSQ2JGk1GTU4i/OcBvEY2zskLS7OSl1L+DfvOA/1hmkW1Xh sHAStgtLN/1t1Gxlft1DyKwPkWe+yvhFckzWEt50jHxyDbcwackPJyZZD mNa0HGTUFsKwKcrnb3FYgIcCgvZFNjyacZbBcOe7TsZO/Z5XtRhDhhKv3 A==; X-IronPort-AV: E=Sophos;i="5.93,354,1654531200"; d="scan'208";a="210903788" Received: from uls-op-cesaip01.wdc.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 29 Sep 2022 12:19:37 +0800 IronPort-SDR: tuFa+qUe/q9ZN2o7vX7xevLQUwRZVdSa96mR3LEKzmDySadIHI2+U0k+vrv4xBgpPtPAcVY4p/ BmTWKOuB8Wlw8XraO3gfaHq/dNG/XlClxwP/yMxXugnVan8zJJyRjl8G4Qtyy5FwWECvOiYz7A bxs0bFuP1l7ch/trWbjScc7rfT8lQYa+MQ0VU21DBLSqarrgLux/hbgb/i5YkTOr+4cwhwpaWN pHadypdfTJ5m4gB9Wwfko+MZ4yiwmnW8b7MHjzbSYdikuTDYT448rnDevbbuZpRdTvvcCOy2rY RFJlLYpG1CFTwYvOf8vX/ynO Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 28 Sep 2022 20:39:32 -0700 IronPort-SDR: oDq2bgrAqiObvtUpUUdCrpKKXiHiM005bSbgAv/MEMZcuTkDCIVMp5AfmifVAfpT66O90XUY14 ruRDxMNoL672fRllzky0GYFIzsTPoeNHt+CrNKGaVYX2F33Ce642ALmOHAuANSdzeVZ+1VeMY2 /AabjQkpPZsd1O0/M1e3xd7eqaS/0GrQojRR6yXOdzoWlz4gITa03zUgaud8vHwbxcfXMidHKr 2MG5CefqXQkbx9b+FLIiTTDdXLu7eNW+sISZtxC7PAGJZtMIQ9UoLex3MsVyAQgGQ2LXZesqqG ERI= WDCIronportException: Internal Received: from h69v0f3.ad.shared (HELO naota-xeon.wdc.com) ([10.225.51.118]) by uls-op-cesaip01.wdc.com with ESMTP; 28 Sep 2022 21:19:37 -0700 From: Naohiro Aota To: fstests@vger.kernel.org Cc: linux-btrfs@vger.kernel.org, Naohiro Aota Subject: [PATCH v2 2/2] btrfs: test active zone tracking Date: Thu, 29 Sep 2022 13:19:25 +0900 Message-Id: <7390d3a918ce574d5349d31ab26fed0ae79952a9.1664419525.git.naohiro.aota@wdc.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org A ZNS device limits the number of active zones, which is the number of zones can be written at the same time. To deal with the limit, btrfs's zoned mode tracks which zone (corresponds to a block group on the SINGLE profile) is active, and finish a zone if necessary. This test checks if the active zone tracking and the finishing of zones works properly. First, it fills zones mostly. And, run some data/metadata stress workload to force btrfs to use a new zone. This test fails on an older kernel (e.g, 5.18.2) like below. btrfs/292 [failed, exit status 1]- output mismatch (see /host/btrfs/292.out.bad) --- tests/btrfs/292.out 2022-09-15 07:52:18.000000000 +0000 +++ /host/btrfs/292.out.bad 2022-09-15 07:59:14.290967793 +0000 @@ -1,2 +1,5 @@ QA output created by 292 -Silence is golden +stress_data_bgs failed +stress_data_bgs_2 failed +failed: '/bin/btrfs subvolume snapshot /mnt/scratch /mnt/scratch/snap825' +(see /host/btrfs/292.full for details) ... (Run 'diff -u /var/lib/xfstests/tests/btrfs/292.out /host/btrfs/292.out.bad' to see the entire diff) The failure is fixed with a series "btrfs: zoned: fix active zone tracking issues" [1] (upstream commits from 65ea1b66482f ("block: add bdev_max_segments() helper") to 2ce543f47843 ("btrfs: zoned: wait until zone is finished when allocation didn't progress")). [1] https://lore.kernel.org/linux-btrfs/cover.1657321126.git.naohiro.aota@wdc.com/ Signed-off-by: Naohiro Aota --- common/zoned | 11 ++++ tests/btrfs/292 | 136 ++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/292.out | 2 + 3 files changed, 149 insertions(+) create mode 100755 tests/btrfs/292 create mode 100644 tests/btrfs/292.out diff --git a/common/zoned b/common/zoned index d1bc60f784a1..eed0082a15cf 100644 --- a/common/zoned +++ b/common/zoned @@ -15,6 +15,17 @@ _filter_blkzone_report() sed -e 's/len/cap/2' } +_require_limited_active_zones() { + local dev=$1 + local sysfs=$(_sysfs_dev ${dev}) + local attr="${sysfs}/queue/max_active_zones" + + [ -e "${attr}" ] || _notrun "cannot find queue/max_active_zones. Maybe non-zoned device?" + if [ $(cat "${attr}") == 0 ]; then + _notrun "this test requires limited active zones" + fi +} + _zone_capacity() { local phy=$1 local dev=$2 diff --git a/tests/btrfs/292 b/tests/btrfs/292 new file mode 100755 index 000000000000..6cfd6b18c299 --- /dev/null +++ b/tests/btrfs/292 @@ -0,0 +1,136 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2022 Western Digital Corporation. All Rights Reserved. +# +# FS QA Test 292 +# +# Test that an active zone is properly reclaimed to allow the further +# allocations, even if the active zones are mostly filled. +# +. ./common/preamble +_begin_fstest auto quick snapshot zone + +# Import common functions. +. ./common/btrfs +. ./common/zoned + +# real QA test starts here + +_supported_fs btrfs +_require_scratch +_require_zoned_device "$SCRATCH_DEV" +_require_limited_active_zones "$SCRATCH_DEV" + +_require_command "$BLKZONE_PROG" blkzone +_require_btrfs_command inspect-internal dump-tree + +# This test requires specific data space usage, skip if we have compression +# enabled. +_require_no_compress + +max_active=$(cat $(_sysfs_dev ${SCRATCH_DEV})/queue/max_active_zones) + +# Fill the zones leaving the last 1MB +fill_active_zones() { + # Asuumes we have the same capacity between zones. + local capacity=$(_zone_capacity 0) + local fill_size=$((capacity - 1024 * 1024)) + + for x in $(seq ${max_active}); do + dd if=/dev/zero of=${SCRATCH_MNT}/fill$(printf "%02d" $x) bs=${fill_size} \ + count=1 oflag=direct 2>/dev/null + $BTRFS_UTIL_PROG filesystem sync ${SCRATCH_MNT} + + local nactive=$($BLKZONE_PROG report ${SCRATCH_DEV} | grep oi | wc -l) + if [[ ${nactive} == ${max_active} ]]; then + break + fi + done + + echo "max active zones: ${max_active}" >> $seqres.full + $BLKZONE_PROG report ${SCRATCH_DEV} | grep oi | cat -n >> $seqres.full +} + +workout() { + local func="$1" + + _scratch_mkfs >/dev/null 2>&1 + _scratch_mount + + fill_active_zones + eval "$func" + local ret=$? + + _scratch_unmount + _check_btrfs_filesystem ${SCRATCH_DEV} + + return $ret +} + +stress_data_bgs() { + # This dd fails with ENOSPC, which should not :( + dd if=/dev/zero of=${SCRATCH_MNT}/large bs=64M count=1 oflag=sync \ + >>$seqres.full 2>&1 +} + +stress_data_bgs_2() { + # This dd fails with ENOSPC, which should not :( + dd if=/dev/zero of=${SCRATCH_MNT}/large bs=64M count=10 conv=fsync \ + >>$seqres.full 2>&1 & + local pid1=$! + + dd if=/dev/zero of=${SCRATCH_MNT}/large2 bs=64M count=10 conv=fsync \ + >>$seqres.full 2>&1 & + local pid2=$! + + wait $pid1; local ret1=$? + wait $pid2; local ret2=$? + + if [ $ret1 -ne 0 -o $ret2 -ne 0 ]; then + return 1 + fi + return 0 +} + +get_meta_bgs() { + $BTRFS_UTIL_PROG inspect-internal dump-tree -t EXTENT ${SCRATCH_DEV} | + grep BLOCK_GROUP -A 1 |grep -B1 'METADATA|' | + grep -oP '\(\d+ BLOCK_GROUP_ITEM \d+\)' +} + +# This test case does not return the result because +# _run_btrfs_util_prog will call _fail() in the error case anyway. +stress_metadata_bgs() { + local metabgs=$(get_meta_bgs) + local count=0 + + while : ; do + _run_btrfs_util_prog subvolume snapshot ${SCRATCH_MNT} ${SCRATCH_MNT}/snap$i + _run_btrfs_util_prog filesystem sync ${SCRATCH_MNT} + cur_metabgs=$(get_meta_bgs) + if [[ "${cur_metabgs}" != "${metabgs}" ]]; then + break + fi + i=$((i + 1)) + done +} + +WORKS=( + stress_data_bgs + stress_data_bgs_2 + stress_metadata_bgs +) + +status=0 +for work in "${WORKS[@]}"; do + if ! workout "${work}"; then + echo "${work} failed" + status=1 + fi +done + +# success, all done +if [ $status -eq 0 ]; then + echo "Silence is golden" +fi +exit diff --git a/tests/btrfs/292.out b/tests/btrfs/292.out new file mode 100644 index 000000000000..627309d3fbd2 --- /dev/null +++ b/tests/btrfs/292.out @@ -0,0 +1,2 @@ +QA output created by 292 +Silence is golden