From patchwork Sun Sep 4 04:14:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li Zhang X-Patchwork-Id: 12965116 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 0F7ADECAAD5 for ; Sun, 4 Sep 2022 04:14:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231714AbiIDEOn (ORCPT ); Sun, 4 Sep 2022 00:14:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230007AbiIDEOl (ORCPT ); Sun, 4 Sep 2022 00:14:41 -0400 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D61CDEED for ; Sat, 3 Sep 2022 21:14:33 -0700 (PDT) Received: by mail-pj1-x1030.google.com with SMTP id z3-20020a17090abd8300b001fd803e34f1so9208211pjr.1 for ; Sat, 03 Sep 2022 21:14:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=9g7DJze9OzN1o2zThDt23EUnrZErPTw2tS3UWHoQ1Qc=; b=OFsRnDS58txasmUCQ5Qj6iHAfjonj7QT/hKucqNu+itr9vsNZEganeD5lf9LLr6Fyg HQB9zt2WGatQdiWYwXOBU1fj3hagGZfWwZpGyVudbfjrpP98xuMKrkROrjUt5D/RJ3Xw qzSwpo0tvGJxvD+Yl2AhehUKNZ5Jek9Pyh7oeNH3iVN+Ur+LBd0Z9G0rInFssraAhHIY E+rZ/uwnJgpccv1RhKvd0lcEB/WZnGlVDdmdlQMSIR3ZgtuIAK+yC9Kj/a3KbMP1qb2d TbRhFCM7G4e9KDaD2+ZuCkXKJbQsZ8YltzMUjbJAEyRIOOraM5qI32ul2nprwNomNhgT DzBQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=9g7DJze9OzN1o2zThDt23EUnrZErPTw2tS3UWHoQ1Qc=; b=aMqqD1EFdRlnCT21cPwfHr5Y6oIcQsdfhncpCWPFW3IQAFcYsl6rUWAd6P2enMSqoh JcE0QIAqWVtzftAuOETSuiY3UI0Jqy9cU+lRLGX/R2NOIYCzHzdlYHXWwGbdOTIgT/s7 xW4eDoH+0IdaFxlHK6LnwDnR5WTDCbZA1vfwnbNS7vetosqyEljrAs3QJ3L4x6xk/PYw 4UFP+7I2/T+HcPHx4Npi729YkhykaEglA1Q2Pfqy7uA5r9LM7z4417UVO9RDloyxjxcW 66Ha4ZlS8GIOnCTr1TJbBInke/RTUQKF4ATfFgaoW3TTSmfAUE3UcBmE3XsqP5iezpsN /SWQ== X-Gm-Message-State: ACgBeo35WEePyvaUjpiJqZPNo3t/RzrPrDHCtDPpQV2SPgx1cg9lplcE w7Fmp4mX1molzW0TNletG6gIdytQX54lpQ== X-Google-Smtp-Source: AA6agR4A0bABpADsuRn9uRrmZyKkvq4xeFwsdLC77q+QL+Zwcc8rLLgWBfWbMZ8BoluBR8FTUmnvzA== X-Received: by 2002:a17:902:76c6:b0:175:395c:b650 with SMTP id j6-20020a17090276c600b00175395cb650mr22552543plt.98.1662264872852; Sat, 03 Sep 2022 21:14:32 -0700 (PDT) Received: from zllke.localdomain ([219.137.141.186]) by smtp.gmail.com with ESMTPSA id j18-20020a170902759200b0016c50179b1esm4507778pll.152.2022.09.03.21.14.31 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 03 Sep 2022 21:14:32 -0700 (PDT) From: Li Zhang To: linux-btrfs@vger.kernel.org Cc: Li Zhang Subject: [PATCH V3] Make btrfs_prepare_device parallel during mkfs.btrfs Date: Sun, 4 Sep 2022 12:14:17 +0800 Message-Id: <1662264857-11347-1-git-send-email-zhanglikernel@gmail.com> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org [enhancement] When a disk is formatted as btrfs, it calls btrfs_prepare_device for each device, which takes too much time. [implementation] Put each btrfs_prepare_device into a thread, wait for the first thread to complete to mkfs.btrfs, and wait for other threads to complete before adding other devices to the file system. [test] Using the btrfs-progs test case mkfs-tests, mkfs.btrfs works fine. Use tcmu-runner emulation to simulate two devices for testing. Each device is 2000G (about 19.53 TiB), the region size is 4MB, Use the following parameters for targetcli create name=zbc0 size=20000G cfgstring=model-HM/zsize-4/conv-100@~/zbc0.raw Call difftime to calculate the running time of the function btrfs_prepare_device. Calculate the time from thread creation to completion of all threads after patching (time calculation is not included in patch submission) The test results are as follows. $ lsscsi -p [10:0:1:0] (0x14) LIO-ORG TCMU ZBC device 0002 /dev/sdb - none [11:0:1:0] (0x14) LIO-ORG TCMU ZBC device 0002 /dev/sdc - none $ sudo mkfs.btrfs -d single -m single -O zoned /dev/sdc /dev/sdb -f .... time for prepare devices:4.000000. .... $ sudo mkfs.btrfs -d single -m single -O zoned /dev/sdc /dev/sdb -f ... time for prepare devices:2.000000. ... Signed-off-by: Li Zhang Reviewed-by: Qu Wenruo --- Issue: 496 V1: * Put btrfs_prepare_device into threads and make them parallel V2: * Set the 4 variables used by btrfs_prepare_device as global variables. * Use pthread_mutex to ensure error messages are not messed up. * Correct the error message * Wait for all threads to exit in a loop V3: * Add prefix opt to the global variables * Format code * Add error handler for open mkfs/main.c | 157 ++++++++++++++++++++++++++++++++++++++++++------------------ 1 file changed, 110 insertions(+), 47 deletions(-) diff --git a/mkfs/main.c b/mkfs/main.c index ce096d3..2c681f2 100644 --- a/mkfs/main.c +++ b/mkfs/main.c @@ -31,6 +31,7 @@ #include #include #include +#include #include "kernel-shared/ctree.h" #include "kernel-shared/disk-io.h" #include "kernel-shared/free-space-tree.h" @@ -60,6 +61,20 @@ struct mkfs_allocation { u64 system; }; +static bool opt_zero_end; +static bool opt_discard; +static bool opt_zoned; +static int opt_oflags; + +static pthread_mutex_t prepare_mutex; + +struct prepare_device_progress { + char *file; + u64 dev_block_count; + u64 block_count; + int ret; +}; + static int create_metadata_block_groups(struct btrfs_root *root, bool mixed, struct mkfs_allocation *allocation) { @@ -969,6 +984,31 @@ fail: return ret; } +static void *prepare_one_dev(void *ctx) +{ + struct prepare_device_progress *prepare_ctx = ctx; + int fd; + + fd = open(prepare_ctx->file, opt_oflags); + if (fd < 0) { + pthread_mutex_lock(&prepare_mutex); + error("unable to open %s: %m", prepare_ctx->file); + pthread_mutex_unlock(&prepare_mutex); + prepare_ctx->ret = fd; + return NULL; + } + prepare_ctx->ret = btrfs_prepare_device(fd, + prepare_ctx->file, + &prepare_ctx->dev_block_count, + prepare_ctx->block_count, + (bconf.verbose ? PREP_DEVICE_VERBOSE : 0) | + (opt_zero_end ? PREP_DEVICE_ZERO_END : 0) | + (opt_discard ? PREP_DEVICE_DISCARD : 0) | + (opt_zoned ? PREP_DEVICE_ZONED : 0)); + close(fd); + return NULL; +} + int BOX_MAIN(mkfs)(int argc, char **argv) { char *file; @@ -984,7 +1024,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv) u32 nodesize = 0; u32 sectorsize = 0; u32 stripesize = 4096; - bool zero_end = true; + opt_zero_end = true; int fd = -1; int ret = 0; int close_ret; @@ -993,11 +1033,10 @@ int BOX_MAIN(mkfs)(int argc, char **argv) bool nodesize_forced = false; bool data_profile_opt = false; bool metadata_profile_opt = false; - bool discard = true; + opt_discard = true; bool ssd = false; - bool zoned = false; + opt_zoned = false; bool force_overwrite = false; - int oflags; char *source_dir = NULL; bool source_dir_set = false; bool shrink_rootdir = false; @@ -1006,6 +1045,8 @@ int BOX_MAIN(mkfs)(int argc, char **argv) u64 shrink_size; int dev_cnt = 0; int saved_optind; + pthread_t *t_prepare = NULL; + struct prepare_device_progress *prepare_ctx = NULL; char fs_uuid[BTRFS_UUID_UNPARSED_SIZE] = { 0 }; u64 features = BTRFS_MKFS_DEFAULT_FEATURES; u64 runtime_features = BTRFS_MKFS_DEFAULT_RUNTIME_FEATURES; @@ -1126,7 +1167,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv) break; case 'b': block_count = parse_size_from_string(optarg); - zero_end = false; + opt_zero_end = false; break; case 'v': bconf_be_verbose(); @@ -1144,7 +1185,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv) BTRFS_UUID_UNPARSED_SIZE - 1); break; case 'K': - discard = false; + opt_discard = false; break; case 'q': bconf_be_quiet(); @@ -1183,7 +1224,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv) if (dev_cnt == 0) print_usage(1); - zoned = !!(features & BTRFS_FEATURE_INCOMPAT_ZONED); + opt_zoned = !!(features & BTRFS_FEATURE_INCOMPAT_ZONED); if (source_dir_set && dev_cnt > 1) { error("the option -r is limited to a single device"); @@ -1225,7 +1266,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv) file = argv[optind++]; ssd = is_ssd(file); - if (zoned) { + if (opt_zoned) { if (!zone_size(file)) { error("zoned: %s: zone size undefined", file); exit(1); @@ -1235,7 +1276,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv) printf( "Zoned: %s: host-managed device detected, setting zoned feature\n", file); - zoned = true; + opt_zoned = true; features |= BTRFS_FEATURE_INCOMPAT_ZONED; } @@ -1302,7 +1343,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv) } } - if (zoned) { + if (opt_zoned) { if (source_dir_set) { error("the option -r and zoned mode are incompatible"); exit(1); @@ -1392,7 +1433,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv) * 1 zone for a metadata block group * 1 zone for a data block group */ - if (zoned && block_count && block_count < 5 * zone_size(file)) { + if (opt_zoned && block_count && block_count < 5 * zone_size(file)) { error("size %llu is too small to make a usable filesystem", block_count); error("minimum size for a zoned btrfs filesystem is %llu", @@ -1422,35 +1463,58 @@ int BOX_MAIN(mkfs)(int argc, char **argv) if (ret) goto error; - if (zoned && (!zoned_profile_supported(BTRFS_BLOCK_GROUP_METADATA | metadata_profile) || + if (opt_zoned && (!zoned_profile_supported(BTRFS_BLOCK_GROUP_METADATA | metadata_profile) || !zoned_profile_supported(BTRFS_BLOCK_GROUP_DATA | data_profile))) { error("zoned mode does not yet support RAID/DUP profiles, please specify '-d single -m single' manually"); goto error; } - dev_cnt--; + t_prepare = calloc(dev_cnt, sizeof(*t_prepare)); + prepare_ctx = calloc(dev_cnt, sizeof(*prepare_ctx)); - oflags = O_RDWR; - if (zoned && zoned_model(file) == ZONED_HOST_MANAGED) - oflags |= O_DIRECT; + if (!t_prepare || !prepare_ctx) { + error("unable to alloc thread for preparing dev"); + goto error; + } - /* - * Open without O_EXCL so that the problem should not occur by the - * following operation in kernel: - * (btrfs_register_one_device() fails if O_EXCL is on) - */ - fd = open(file, oflags); + pthread_mutex_init(&prepare_mutex, NULL); + opt_oflags = O_RDWR; + for (i = 0; i < dev_cnt; i++) { + if (opt_zoned && zoned_model(argv[optind + i - 1]) == + ZONED_HOST_MANAGED) { + opt_oflags |= O_DIRECT; + break; + } + } + for (i = 0; i < dev_cnt; i++) { + prepare_ctx[i].file = argv[optind + i - 1]; + prepare_ctx[i].block_count = block_count; + prepare_ctx[i].dev_block_count = block_count; + ret = pthread_create(&t_prepare[i], NULL, + prepare_one_dev, &prepare_ctx[i]); + if (ret) { + error("create thread for prepare devices: %s failed, " + "errno: %d", + prepare_ctx[i].file, ret); + goto error; + } + } + for (i = 0; i < dev_cnt; i++) + pthread_join(t_prepare[i], NULL); + ret = prepare_ctx[0].ret; + + if (ret) { + error("unable prepare device: %s\n", prepare_ctx[0].file); + goto error; + } + + dev_cnt--; + fd = open(file, opt_oflags); if (fd < 0) { error("unable to open %s: %m", file); goto error; } - ret = btrfs_prepare_device(fd, file, &dev_block_count, block_count, - (zero_end ? PREP_DEVICE_ZERO_END : 0) | - (discard ? PREP_DEVICE_DISCARD : 0) | - (bconf.verbose ? PREP_DEVICE_VERBOSE : 0) | - (zoned ? PREP_DEVICE_ZONED : 0)); - if (ret) - goto error; + dev_block_count = prepare_ctx[0].dev_block_count; if (block_count && block_count > dev_block_count) { error("%s is smaller than requested size, expected %llu, found %llu", file, (unsigned long long)block_count, @@ -1459,7 +1523,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv) } /* To create the first block group and chunk 0 in make_btrfs */ - system_group_size = zoned ? zone_size(file) : BTRFS_MKFS_SYSTEM_GROUP_SIZE; + system_group_size = opt_zoned ? zone_size(file) : BTRFS_MKFS_SYSTEM_GROUP_SIZE; if (dev_block_count < system_group_size) { error("device is too small to make filesystem, must be at least %llu", (unsigned long long)system_group_size); @@ -1487,7 +1551,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv) mkfs_cfg.runtime_features = runtime_features; mkfs_cfg.csum_type = csum_type; mkfs_cfg.leaf_data_size = __BTRFS_LEAF_DATA_SIZE(nodesize); - if (zoned) + if (opt_zoned) mkfs_cfg.zone_size = zone_size(file); else mkfs_cfg.zone_size = 0; @@ -1558,14 +1622,10 @@ int BOX_MAIN(mkfs)(int argc, char **argv) goto raid_groups; while (dev_cnt-- > 0) { + int dev_index = argc - saved_optind - dev_cnt - 1; file = argv[optind++]; - /* - * open without O_EXCL so that the problem should not - * occur by the following processing. - * (btrfs_register_one_device() fails if O_EXCL is on) - */ - fd = open(file, O_RDWR); + fd = open(file, opt_oflags); if (fd < 0) { error("unable to open %s: %m", file); goto error; @@ -1578,13 +1638,12 @@ int BOX_MAIN(mkfs)(int argc, char **argv) close(fd); continue; } - ret = btrfs_prepare_device(fd, file, &dev_block_count, - block_count, - (bconf.verbose ? PREP_DEVICE_VERBOSE : 0) | - (zero_end ? PREP_DEVICE_ZERO_END : 0) | - (discard ? PREP_DEVICE_DISCARD : 0) | - (zoned ? PREP_DEVICE_ZONED : 0)); - if (ret) { + dev_block_count = prepare_ctx[dev_index] + .dev_block_count; + + if (prepare_ctx[dev_index].ret) { + error("unable prepare device: %s.\n", + prepare_ctx[dev_index].file); goto error; } @@ -1714,8 +1773,8 @@ raid_groups: btrfs_group_profile_str(metadata_profile), pretty_size(allocation.system)); printf("SSD detected: %s\n", ssd ? "yes" : "no"); - printf("Zoned device: %s\n", zoned ? "yes" : "no"); - if (zoned) + printf("Zoned device: %s\n", opt_zoned ? "yes" : "no"); + if (opt_zoned) printf(" Zone size: %s\n", pretty_size(fs_info->zone_size)); btrfs_parse_fs_features_to_string(features_buf, features); @@ -1763,12 +1822,16 @@ out: btrfs_close_all_devices(); free(label); - + free(t_prepare); + free(prepare_ctx); return !!ret; + error: if (fd > 0) close(fd); + free(t_prepare); + free(prepare_ctx); free(label); exit(1); success: