From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 105F5C64E7B for ; Sat, 28 Nov 2020 22:10:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BEFEA21534 for ; Sat, 28 Nov 2020 22:10:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Tl1rAw0G" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389757AbgK1VuF (ORCPT ); Sat, 28 Nov 2020 16:50:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731247AbgK1SsT (ORCPT ); Sat, 28 Nov 2020 13:48:19 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E5CEC025490; Sat, 28 Nov 2020 08:16:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=HZ9chmdKm2N0iLA0nAi4kCuONqtMMD6n4wQeHuEGTJM=; b=Tl1rAw0GbEer1Qk8aiPvvfTpBM eYT1NGOSQd7kpZOMWekxpWItO57R6n1SWZITT38g8qn9Rkxok/jPXg/OocDI9x6hwMhvUbguFCvHA KZ290bzSrTky+L60+rdaJA9UeSde986fJBg2jk4C1D5nvYTdiQE6nOox2VMgP2V6vfLkmEd8kcTzC 8J0+UiAoHlgjqaRz938e7haVjdeA1pzGmws0+zJeo0wM6IQrka6KaHtUXpPfy6v+0bjvs1enPH7xZ RLFcp/knUPgAsr+GoKkzVMFal4TW4IosV5VBdnFZkfoTuZ5+jY5AijG3ML2lYGQuIBtkaH07w9Jhh sMveJD9w==; Received: from [2001:4bb8:18c:1dd6:48f3:741a:602e:7fdd] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kj2tK-0000Nl-EB; Sat, 28 Nov 2020 16:16:06 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Tejun Heo , Josef Bacik , Coly Li , Mike Snitzer , Greg Kroah-Hartman , Jan Kara , Johannes Thumshirn , dm-devel@redhat.com, Jan Kara , linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 31/45] block: move disk stat accounting to struct block_device Date: Sat, 28 Nov 2020 17:14:56 +0100 Message-Id: <20201128161510.347752-32-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201128161510.347752-1-hch@lst.de> References: <20201128161510.347752-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Move the dkstats and stamp field to struct block_device in preparation of killing struct hd_struct. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara --- block/blk-cgroup.c | 2 +- block/blk-core.c | 4 ++-- block/blk.h | 1 - block/genhd.c | 14 ++++---------- block/partitions/core.c | 9 +-------- fs/block_dev.c | 10 ++++++++++ include/linux/blk_types.h | 2 ++ include/linux/genhd.h | 2 -- include/linux/part_stat.h | 38 +++++++++++++++++++------------------- 9 files changed, 39 insertions(+), 43 deletions(-) diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 19650eb42b9f00..5c0a9d588e6312 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -830,7 +830,7 @@ static void blkcg_fill_root_iostats(void) for_each_possible_cpu(cpu) { struct disk_stats *cpu_dkstats; - cpu_dkstats = per_cpu_ptr(part->dkstats, cpu); + cpu_dkstats = per_cpu_ptr(part->bdev->bd_stats, cpu); tmp.ios[BLKG_IOSTAT_READ] += cpu_dkstats->ios[STAT_READ]; tmp.ios[BLKG_IOSTAT_WRITE] += diff --git a/block/blk-core.c b/block/blk-core.c index 988f45094a387b..d2c9cb24e087f3 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1264,9 +1264,9 @@ static void update_io_ticks(struct hd_struct *part, unsigned long now, bool end) { unsigned long stamp; again: - stamp = READ_ONCE(part->stamp); + stamp = READ_ONCE(part->bdev->bd_stamp); if (unlikely(stamp != now)) { - if (likely(cmpxchg(&part->stamp, stamp, now) == stamp)) + if (likely(cmpxchg(&part->bdev->bd_stamp, stamp, now) == stamp)) __part_stat_add(part, io_ticks, end ? now - stamp : 1); } if (part->partno) { diff --git a/block/blk.h b/block/blk.h index 09cee7024fb43e..3f801f6e86f8a1 100644 --- a/block/blk.h +++ b/block/blk.h @@ -381,7 +381,6 @@ static inline void hd_struct_put(struct hd_struct *part) static inline void hd_free_part(struct hd_struct *part) { - free_percpu(part->dkstats); kfree(part->info); bdput(part->bdev); percpu_ref_exit(&part->ref); diff --git a/block/genhd.c b/block/genhd.c index c6016fde4725b0..9eead2970cb3d4 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -104,7 +104,7 @@ static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat) memset(stat, 0, sizeof(struct disk_stats)); for_each_possible_cpu(cpu) { - struct disk_stats *ptr = per_cpu_ptr(part->dkstats, cpu); + struct disk_stats *ptr = per_cpu_ptr(part->bdev->bd_stats, cpu); int group; for (group = 0; group < NR_STAT_GROUPS; group++) { @@ -883,7 +883,7 @@ void del_gendisk(struct gendisk *disk) kobject_put(disk->slave_dir); part_stat_set_all(&disk->part0, 0); - disk->part0.stamp = 0; + disk->part0.bdev->bd_stamp = 0; if (!sysfs_deprecated) sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk))); pm_runtime_set_memalloc_noio(disk_to_dev(disk), false); @@ -1620,19 +1620,15 @@ struct gendisk *__alloc_disk_node(int minors, int node_id) if (!disk->part0.bdev) goto out_free_disk; - disk->part0.dkstats = alloc_percpu(struct disk_stats); - if (!disk->part0.dkstats) - goto out_bdput; - disk->node_id = node_id; if (disk_expand_part_tbl(disk, 0)) - goto out_free_bdstats; + goto out_bdput; ptbl = rcu_dereference_protected(disk->part_tbl, 1); rcu_assign_pointer(ptbl->part[0], &disk->part0); if (hd_ref_init(&disk->part0)) - goto out_free_bdstats; + goto out_bdput; disk->minors = minors; rand_initialize_disk(disk); @@ -1641,8 +1637,6 @@ struct gendisk *__alloc_disk_node(int minors, int node_id) device_initialize(disk_to_dev(disk)); return disk; -out_free_bdstats: - free_percpu(disk->part0.dkstats); out_bdput: bdput(disk->part0.bdev); out_free_disk: diff --git a/block/partitions/core.c b/block/partitions/core.c index bcfa8215bd5ef3..8924e1ea8b2ad6 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -409,14 +409,9 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno, if (!p) return ERR_PTR(-EBUSY); - err = -ENOMEM; - p->dkstats = alloc_percpu(struct disk_stats); - if (!p->dkstats) - goto out_free; - bdev = bdev_alloc(disk, partno); if (!bdev) - goto out_free_stats; + goto out_free; p->bdev = bdev; pdev = part_to_dev(p); @@ -490,8 +485,6 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno, kfree(p->info); out_bdput: bdput(bdev); -out_free_stats: - free_percpu(p->dkstats); out_free: kfree(p); return ERR_PTR(err); diff --git a/fs/block_dev.c b/fs/block_dev.c index 31ee5a857f7153..0832c7830f3a10 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include #include "internal.h" @@ -781,6 +782,10 @@ static struct inode *bdev_alloc_inode(struct super_block *sb) static void bdev_free_inode(struct inode *inode) { + struct block_device *bdev = I_BDEV(inode); + + free_percpu(bdev->bd_stats); + kmem_cache_free(bdev_cachep, BDEV_I(inode)); } @@ -875,6 +880,11 @@ struct block_device *bdev_alloc(struct gendisk *disk, u8 partno) #ifdef CONFIG_SYSFS INIT_LIST_HEAD(&bdev->bd_holder_disks); #endif + bdev->bd_stats = alloc_percpu(struct disk_stats); + if (!bdev->bd_stats) { + iput(inode); + return NULL; + } return bdev; } diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 2e0a9bd9688d28..520011b95276fb 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -20,6 +20,8 @@ typedef void (bio_end_io_t) (struct bio *); struct bio_crypt_ctx; struct block_device { + struct disk_stats __percpu *bd_stats; + unsigned long bd_stamp; dev_t bd_dev; int bd_openers; struct inode * bd_inode; /* will die */ diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 30d4785b7df8bb..804ac45fbfbc53 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -52,8 +52,6 @@ struct partition_meta_info { struct hd_struct { sector_t start_sect; - unsigned long stamp; - struct disk_stats __percpu *dkstats; struct percpu_ref ref; struct block_device *bdev; diff --git a/include/linux/part_stat.h b/include/linux/part_stat.h index 24125778ef3ec7..87ad60106e1db0 100644 --- a/include/linux/part_stat.h +++ b/include/linux/part_stat.h @@ -25,17 +25,17 @@ struct disk_stats { #define part_stat_unlock() preempt_enable() #define part_stat_get_cpu(part, field, cpu) \ - (per_cpu_ptr((part)->dkstats, (cpu))->field) + (per_cpu_ptr((part)->bdev->bd_stats, (cpu))->field) #define part_stat_get(part, field) \ part_stat_get_cpu(part, field, smp_processor_id()) #define part_stat_read(part, field) \ ({ \ - typeof((part)->dkstats->field) res = 0; \ + typeof((part)->bdev->bd_stats->field) res = 0; \ unsigned int _cpu; \ for_each_possible_cpu(_cpu) \ - res += per_cpu_ptr((part)->dkstats, _cpu)->field; \ + res += per_cpu_ptr((part)->bdev->bd_stats, _cpu)->field; \ res; \ }) @@ -44,7 +44,7 @@ static inline void part_stat_set_all(struct hd_struct *part, int value) int i; for_each_possible_cpu(i) - memset(per_cpu_ptr(part->dkstats, i), value, + memset(per_cpu_ptr(part->bdev->bd_stats, i), value, sizeof(struct disk_stats)); } @@ -54,7 +54,7 @@ static inline void part_stat_set_all(struct hd_struct *part, int value) part_stat_read(part, field[STAT_DISCARD])) #define __part_stat_add(part, field, addnd) \ - __this_cpu_add((part)->dkstats->field, addnd) + __this_cpu_add((part)->bdev->bd_stats->field, addnd) #define part_stat_add(part, field, addnd) do { \ __part_stat_add((part), field, addnd); \ @@ -63,20 +63,20 @@ static inline void part_stat_set_all(struct hd_struct *part, int value) field, addnd); \ } while (0) -#define part_stat_dec(gendiskp, field) \ - part_stat_add(gendiskp, field, -1) -#define part_stat_inc(gendiskp, field) \ - part_stat_add(gendiskp, field, 1) -#define part_stat_sub(gendiskp, field, subnd) \ - part_stat_add(gendiskp, field, -subnd) +#define part_stat_dec(part, field) \ + part_stat_add(part, field, -1) +#define part_stat_inc(part, field) \ + part_stat_add(part, field, 1) +#define part_stat_sub(part, field, subnd) \ + part_stat_add(part, field, -subnd) -#define part_stat_local_dec(gendiskp, field) \ - local_dec(&(part_stat_get(gendiskp, field))) -#define part_stat_local_inc(gendiskp, field) \ - local_inc(&(part_stat_get(gendiskp, field))) -#define part_stat_local_read(gendiskp, field) \ - local_read(&(part_stat_get(gendiskp, field))) -#define part_stat_local_read_cpu(gendiskp, field, cpu) \ - local_read(&(part_stat_get_cpu(gendiskp, field, cpu))) +#define part_stat_local_dec(part, field) \ + local_dec(&(part_stat_get(part, field))) +#define part_stat_local_inc(part, field) \ + local_inc(&(part_stat_get(part, field))) +#define part_stat_local_read(part, field) \ + local_read(&(part_stat_get(part, field))) +#define part_stat_local_read_cpu(part, field, cpu) \ + local_read(&(part_stat_get_cpu(part, field, cpu))) #endif /* _LINUX_PART_STAT_H */ -- 2.29.2 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5CA17C63697 for ; 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bh=HZ9chmdKm2N0iLA0nAi4kCuONqtMMD6n4wQeHuEGTJM=; b=Tl1rAw0GbEer1Qk8aiPvvfTpBM eYT1NGOSQd7kpZOMWekxpWItO57R6n1SWZITT38g8qn9Rkxok/jPXg/OocDI9x6hwMhvUbguFCvHA KZ290bzSrTky+L60+rdaJA9UeSde986fJBg2jk4C1D5nvYTdiQE6nOox2VMgP2V6vfLkmEd8kcTzC 8J0+UiAoHlgjqaRz938e7haVjdeA1pzGmws0+zJeo0wM6IQrka6KaHtUXpPfy6v+0bjvs1enPH7xZ RLFcp/knUPgAsr+GoKkzVMFal4TW4IosV5VBdnFZkfoTuZ5+jY5AijG3ML2lYGQuIBtkaH07w9Jhh sMveJD9w==; Received: from [2001:4bb8:18c:1dd6:48f3:741a:602e:7fdd] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kj2tK-0000Nl-EB; Sat, 28 Nov 2020 16:16:06 +0000 From: Christoph Hellwig To: Jens Axboe Subject: [PATCH 31/45] block: move disk stat accounting to struct block_device Date: Sat, 28 Nov 2020 17:14:56 +0100 Message-Id: <20201128161510.347752-32-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201128161510.347752-1-hch@lst.de> References: <20201128161510.347752-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-bcache@vger.kernel.org, Jan Kara , Mike Snitzer , linux-mm@kvack.org, Greg Kroah-Hartman , Jan Kara , Josef Bacik , Coly Li , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, dm-devel@redhat.com, linux-mtd@lists.infradead.org, Johannes Thumshirn , Tejun Heo Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Move the dkstats and stamp field to struct block_device in preparation of killing struct hd_struct. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara --- block/blk-cgroup.c | 2 +- block/blk-core.c | 4 ++-- block/blk.h | 1 - block/genhd.c | 14 ++++---------- block/partitions/core.c | 9 +-------- fs/block_dev.c | 10 ++++++++++ include/linux/blk_types.h | 2 ++ include/linux/genhd.h | 2 -- include/linux/part_stat.h | 38 +++++++++++++++++++------------------- 9 files changed, 39 insertions(+), 43 deletions(-) diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 19650eb42b9f00..5c0a9d588e6312 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -830,7 +830,7 @@ static void blkcg_fill_root_iostats(void) for_each_possible_cpu(cpu) { struct disk_stats *cpu_dkstats; - cpu_dkstats = per_cpu_ptr(part->dkstats, cpu); + cpu_dkstats = per_cpu_ptr(part->bdev->bd_stats, cpu); tmp.ios[BLKG_IOSTAT_READ] += cpu_dkstats->ios[STAT_READ]; tmp.ios[BLKG_IOSTAT_WRITE] += diff --git a/block/blk-core.c b/block/blk-core.c index 988f45094a387b..d2c9cb24e087f3 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1264,9 +1264,9 @@ static void update_io_ticks(struct hd_struct *part, unsigned long now, bool end) { unsigned long stamp; again: - stamp = READ_ONCE(part->stamp); + stamp = READ_ONCE(part->bdev->bd_stamp); if (unlikely(stamp != now)) { - if (likely(cmpxchg(&part->stamp, stamp, now) == stamp)) + if (likely(cmpxchg(&part->bdev->bd_stamp, stamp, now) == stamp)) __part_stat_add(part, io_ticks, end ? now - stamp : 1); } if (part->partno) { diff --git a/block/blk.h b/block/blk.h index 09cee7024fb43e..3f801f6e86f8a1 100644 --- a/block/blk.h +++ b/block/blk.h @@ -381,7 +381,6 @@ static inline void hd_struct_put(struct hd_struct *part) static inline void hd_free_part(struct hd_struct *part) { - free_percpu(part->dkstats); kfree(part->info); bdput(part->bdev); percpu_ref_exit(&part->ref); diff --git a/block/genhd.c b/block/genhd.c index c6016fde4725b0..9eead2970cb3d4 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -104,7 +104,7 @@ static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat) memset(stat, 0, sizeof(struct disk_stats)); for_each_possible_cpu(cpu) { - struct disk_stats *ptr = per_cpu_ptr(part->dkstats, cpu); + struct disk_stats *ptr = per_cpu_ptr(part->bdev->bd_stats, cpu); int group; for (group = 0; group < NR_STAT_GROUPS; group++) { @@ -883,7 +883,7 @@ void del_gendisk(struct gendisk *disk) kobject_put(disk->slave_dir); part_stat_set_all(&disk->part0, 0); - disk->part0.stamp = 0; + disk->part0.bdev->bd_stamp = 0; if (!sysfs_deprecated) sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk))); pm_runtime_set_memalloc_noio(disk_to_dev(disk), false); @@ -1620,19 +1620,15 @@ struct gendisk *__alloc_disk_node(int minors, int node_id) if (!disk->part0.bdev) goto out_free_disk; - disk->part0.dkstats = alloc_percpu(struct disk_stats); - if (!disk->part0.dkstats) - goto out_bdput; - disk->node_id = node_id; if (disk_expand_part_tbl(disk, 0)) - goto out_free_bdstats; + goto out_bdput; ptbl = rcu_dereference_protected(disk->part_tbl, 1); rcu_assign_pointer(ptbl->part[0], &disk->part0); if (hd_ref_init(&disk->part0)) - goto out_free_bdstats; + goto out_bdput; disk->minors = minors; rand_initialize_disk(disk); @@ -1641,8 +1637,6 @@ struct gendisk *__alloc_disk_node(int minors, int node_id) device_initialize(disk_to_dev(disk)); return disk; -out_free_bdstats: - free_percpu(disk->part0.dkstats); out_bdput: bdput(disk->part0.bdev); out_free_disk: diff --git a/block/partitions/core.c b/block/partitions/core.c index bcfa8215bd5ef3..8924e1ea8b2ad6 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -409,14 +409,9 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno, if (!p) return ERR_PTR(-EBUSY); - err = -ENOMEM; - p->dkstats = alloc_percpu(struct disk_stats); - if (!p->dkstats) - goto out_free; - bdev = bdev_alloc(disk, partno); if (!bdev) - goto out_free_stats; + goto out_free; p->bdev = bdev; pdev = part_to_dev(p); @@ -490,8 +485,6 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno, kfree(p->info); out_bdput: bdput(bdev); -out_free_stats: - free_percpu(p->dkstats); out_free: kfree(p); return ERR_PTR(err); diff --git a/fs/block_dev.c b/fs/block_dev.c index 31ee5a857f7153..0832c7830f3a10 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include #include "internal.h" @@ -781,6 +782,10 @@ static struct inode *bdev_alloc_inode(struct super_block *sb) static void bdev_free_inode(struct inode *inode) { + struct block_device *bdev = I_BDEV(inode); + + free_percpu(bdev->bd_stats); + kmem_cache_free(bdev_cachep, BDEV_I(inode)); } @@ -875,6 +880,11 @@ struct block_device *bdev_alloc(struct gendisk *disk, u8 partno) #ifdef CONFIG_SYSFS INIT_LIST_HEAD(&bdev->bd_holder_disks); #endif + bdev->bd_stats = alloc_percpu(struct disk_stats); + if (!bdev->bd_stats) { + iput(inode); + return NULL; + } return bdev; } diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 2e0a9bd9688d28..520011b95276fb 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -20,6 +20,8 @@ typedef void (bio_end_io_t) (struct bio *); struct bio_crypt_ctx; struct block_device { + struct disk_stats __percpu *bd_stats; + unsigned long bd_stamp; dev_t bd_dev; int bd_openers; struct inode * bd_inode; /* will die */ diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 30d4785b7df8bb..804ac45fbfbc53 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -52,8 +52,6 @@ struct partition_meta_info { struct hd_struct { sector_t start_sect; - unsigned long stamp; - struct disk_stats __percpu *dkstats; struct percpu_ref ref; struct block_device *bdev; diff --git a/include/linux/part_stat.h b/include/linux/part_stat.h index 24125778ef3ec7..87ad60106e1db0 100644 --- a/include/linux/part_stat.h +++ b/include/linux/part_stat.h @@ -25,17 +25,17 @@ struct disk_stats { #define part_stat_unlock() preempt_enable() #define part_stat_get_cpu(part, field, cpu) \ - (per_cpu_ptr((part)->dkstats, (cpu))->field) + (per_cpu_ptr((part)->bdev->bd_stats, (cpu))->field) #define part_stat_get(part, field) \ part_stat_get_cpu(part, field, smp_processor_id()) #define part_stat_read(part, field) \ ({ \ - typeof((part)->dkstats->field) res = 0; \ + typeof((part)->bdev->bd_stats->field) res = 0; \ unsigned int _cpu; \ for_each_possible_cpu(_cpu) \ - res += per_cpu_ptr((part)->dkstats, _cpu)->field; \ + res += per_cpu_ptr((part)->bdev->bd_stats, _cpu)->field; \ res; \ }) @@ -44,7 +44,7 @@ static inline void part_stat_set_all(struct hd_struct *part, int value) int i; for_each_possible_cpu(i) - memset(per_cpu_ptr(part->dkstats, i), value, + memset(per_cpu_ptr(part->bdev->bd_stats, i), value, sizeof(struct disk_stats)); } @@ -54,7 +54,7 @@ static inline void part_stat_set_all(struct hd_struct *part, int value) part_stat_read(part, field[STAT_DISCARD])) #define __part_stat_add(part, field, addnd) \ - __this_cpu_add((part)->dkstats->field, addnd) + __this_cpu_add((part)->bdev->bd_stats->field, addnd) #define part_stat_add(part, field, addnd) do { \ __part_stat_add((part), field, addnd); \ @@ -63,20 +63,20 @@ static inline void part_stat_set_all(struct hd_struct *part, int value) field, addnd); \ } while (0) -#define part_stat_dec(gendiskp, field) \ - part_stat_add(gendiskp, field, -1) -#define part_stat_inc(gendiskp, field) \ - part_stat_add(gendiskp, field, 1) -#define part_stat_sub(gendiskp, field, subnd) \ - part_stat_add(gendiskp, field, -subnd) +#define part_stat_dec(part, field) \ + part_stat_add(part, field, -1) +#define part_stat_inc(part, field) \ + part_stat_add(part, field, 1) +#define part_stat_sub(part, field, subnd) \ + part_stat_add(part, field, -subnd) -#define part_stat_local_dec(gendiskp, field) \ - local_dec(&(part_stat_get(gendiskp, field))) -#define part_stat_local_inc(gendiskp, field) \ - local_inc(&(part_stat_get(gendiskp, field))) -#define part_stat_local_read(gendiskp, field) \ - local_read(&(part_stat_get(gendiskp, field))) -#define part_stat_local_read_cpu(gendiskp, field, cpu) \ - local_read(&(part_stat_get_cpu(gendiskp, field, cpu))) +#define part_stat_local_dec(part, field) \ + local_dec(&(part_stat_get(part, field))) +#define part_stat_local_inc(part, field) \ + local_inc(&(part_stat_get(part, field))) +#define part_stat_local_read(part, field) \ + local_read(&(part_stat_get(part, field))) +#define part_stat_local_read_cpu(part, field, cpu) \ + local_read(&(part_stat_get_cpu(part, field, cpu))) #endif /* _LINUX_PART_STAT_H */ -- 2.29.2 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/ From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0C15C63697 for ; 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See http://www.infradead.org/rpr.html X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-loop: dm-devel@redhat.com Cc: linux-bcache@vger.kernel.org, Jan Kara , Mike Snitzer , linux-mm@kvack.org, Greg Kroah-Hartman , Jan Kara , Josef Bacik , Coly Li , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, dm-devel@redhat.com, linux-mtd@lists.infradead.org, Johannes Thumshirn , Tejun Heo Subject: [dm-devel] [PATCH 31/45] block: move disk stat accounting to struct block_device X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Move the dkstats and stamp field to struct block_device in preparation of killing struct hd_struct. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara --- block/blk-cgroup.c | 2 +- block/blk-core.c | 4 ++-- block/blk.h | 1 - block/genhd.c | 14 ++++---------- block/partitions/core.c | 9 +-------- fs/block_dev.c | 10 ++++++++++ include/linux/blk_types.h | 2 ++ include/linux/genhd.h | 2 -- include/linux/part_stat.h | 38 +++++++++++++++++++------------------- 9 files changed, 39 insertions(+), 43 deletions(-) diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 19650eb42b9f00..5c0a9d588e6312 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -830,7 +830,7 @@ static void blkcg_fill_root_iostats(void) for_each_possible_cpu(cpu) { struct disk_stats *cpu_dkstats; - cpu_dkstats = per_cpu_ptr(part->dkstats, cpu); + cpu_dkstats = per_cpu_ptr(part->bdev->bd_stats, cpu); tmp.ios[BLKG_IOSTAT_READ] += cpu_dkstats->ios[STAT_READ]; tmp.ios[BLKG_IOSTAT_WRITE] += diff --git a/block/blk-core.c b/block/blk-core.c index 988f45094a387b..d2c9cb24e087f3 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1264,9 +1264,9 @@ static void update_io_ticks(struct hd_struct *part, unsigned long now, bool end) { unsigned long stamp; again: - stamp = READ_ONCE(part->stamp); + stamp = READ_ONCE(part->bdev->bd_stamp); if (unlikely(stamp != now)) { - if (likely(cmpxchg(&part->stamp, stamp, now) == stamp)) + if (likely(cmpxchg(&part->bdev->bd_stamp, stamp, now) == stamp)) __part_stat_add(part, io_ticks, end ? now - stamp : 1); } if (part->partno) { diff --git a/block/blk.h b/block/blk.h index 09cee7024fb43e..3f801f6e86f8a1 100644 --- a/block/blk.h +++ b/block/blk.h @@ -381,7 +381,6 @@ static inline void hd_struct_put(struct hd_struct *part) static inline void hd_free_part(struct hd_struct *part) { - free_percpu(part->dkstats); kfree(part->info); bdput(part->bdev); percpu_ref_exit(&part->ref); diff --git a/block/genhd.c b/block/genhd.c index c6016fde4725b0..9eead2970cb3d4 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -104,7 +104,7 @@ static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat) memset(stat, 0, sizeof(struct disk_stats)); for_each_possible_cpu(cpu) { - struct disk_stats *ptr = per_cpu_ptr(part->dkstats, cpu); + struct disk_stats *ptr = per_cpu_ptr(part->bdev->bd_stats, cpu); int group; for (group = 0; group < NR_STAT_GROUPS; group++) { @@ -883,7 +883,7 @@ void del_gendisk(struct gendisk *disk) kobject_put(disk->slave_dir); part_stat_set_all(&disk->part0, 0); - disk->part0.stamp = 0; + disk->part0.bdev->bd_stamp = 0; if (!sysfs_deprecated) sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk))); pm_runtime_set_memalloc_noio(disk_to_dev(disk), false); @@ -1620,19 +1620,15 @@ struct gendisk *__alloc_disk_node(int minors, int node_id) if (!disk->part0.bdev) goto out_free_disk; - disk->part0.dkstats = alloc_percpu(struct disk_stats); - if (!disk->part0.dkstats) - goto out_bdput; - disk->node_id = node_id; if (disk_expand_part_tbl(disk, 0)) - goto out_free_bdstats; + goto out_bdput; ptbl = rcu_dereference_protected(disk->part_tbl, 1); rcu_assign_pointer(ptbl->part[0], &disk->part0); if (hd_ref_init(&disk->part0)) - goto out_free_bdstats; + goto out_bdput; disk->minors = minors; rand_initialize_disk(disk); @@ -1641,8 +1637,6 @@ struct gendisk *__alloc_disk_node(int minors, int node_id) device_initialize(disk_to_dev(disk)); return disk; -out_free_bdstats: - free_percpu(disk->part0.dkstats); out_bdput: bdput(disk->part0.bdev); out_free_disk: diff --git a/block/partitions/core.c b/block/partitions/core.c index bcfa8215bd5ef3..8924e1ea8b2ad6 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -409,14 +409,9 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno, if (!p) return ERR_PTR(-EBUSY); - err = -ENOMEM; - p->dkstats = alloc_percpu(struct disk_stats); - if (!p->dkstats) - goto out_free; - bdev = bdev_alloc(disk, partno); if (!bdev) - goto out_free_stats; + goto out_free; p->bdev = bdev; pdev = part_to_dev(p); @@ -490,8 +485,6 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno, kfree(p->info); out_bdput: bdput(bdev); -out_free_stats: - free_percpu(p->dkstats); out_free: kfree(p); return ERR_PTR(err); diff --git a/fs/block_dev.c b/fs/block_dev.c index 31ee5a857f7153..0832c7830f3a10 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include #include "internal.h" @@ -781,6 +782,10 @@ static struct inode *bdev_alloc_inode(struct super_block *sb) static void bdev_free_inode(struct inode *inode) { + struct block_device *bdev = I_BDEV(inode); + + free_percpu(bdev->bd_stats); + kmem_cache_free(bdev_cachep, BDEV_I(inode)); } @@ -875,6 +880,11 @@ struct block_device *bdev_alloc(struct gendisk *disk, u8 partno) #ifdef CONFIG_SYSFS INIT_LIST_HEAD(&bdev->bd_holder_disks); #endif + bdev->bd_stats = alloc_percpu(struct disk_stats); + if (!bdev->bd_stats) { + iput(inode); + return NULL; + } return bdev; } diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 2e0a9bd9688d28..520011b95276fb 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -20,6 +20,8 @@ typedef void (bio_end_io_t) (struct bio *); struct bio_crypt_ctx; struct block_device { + struct disk_stats __percpu *bd_stats; + unsigned long bd_stamp; dev_t bd_dev; int bd_openers; struct inode * bd_inode; /* will die */ diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 30d4785b7df8bb..804ac45fbfbc53 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -52,8 +52,6 @@ struct partition_meta_info { struct hd_struct { sector_t start_sect; - unsigned long stamp; - struct disk_stats __percpu *dkstats; struct percpu_ref ref; struct block_device *bdev; diff --git a/include/linux/part_stat.h b/include/linux/part_stat.h index 24125778ef3ec7..87ad60106e1db0 100644 --- a/include/linux/part_stat.h +++ b/include/linux/part_stat.h @@ -25,17 +25,17 @@ struct disk_stats { #define part_stat_unlock() preempt_enable() #define part_stat_get_cpu(part, field, cpu) \ - (per_cpu_ptr((part)->dkstats, (cpu))->field) + (per_cpu_ptr((part)->bdev->bd_stats, (cpu))->field) #define part_stat_get(part, field) \ part_stat_get_cpu(part, field, smp_processor_id()) #define part_stat_read(part, field) \ ({ \ - typeof((part)->dkstats->field) res = 0; \ + typeof((part)->bdev->bd_stats->field) res = 0; \ unsigned int _cpu; \ for_each_possible_cpu(_cpu) \ - res += per_cpu_ptr((part)->dkstats, _cpu)->field; \ + res += per_cpu_ptr((part)->bdev->bd_stats, _cpu)->field; \ res; \ }) @@ -44,7 +44,7 @@ static inline void part_stat_set_all(struct hd_struct *part, int value) int i; for_each_possible_cpu(i) - memset(per_cpu_ptr(part->dkstats, i), value, + memset(per_cpu_ptr(part->bdev->bd_stats, i), value, sizeof(struct disk_stats)); } @@ -54,7 +54,7 @@ static inline void part_stat_set_all(struct hd_struct *part, int value) part_stat_read(part, field[STAT_DISCARD])) #define __part_stat_add(part, field, addnd) \ - __this_cpu_add((part)->dkstats->field, addnd) + __this_cpu_add((part)->bdev->bd_stats->field, addnd) #define part_stat_add(part, field, addnd) do { \ __part_stat_add((part), field, addnd); \ @@ -63,20 +63,20 @@ static inline void part_stat_set_all(struct hd_struct *part, int value) field, addnd); \ } while (0) -#define part_stat_dec(gendiskp, field) \ - part_stat_add(gendiskp, field, -1) -#define part_stat_inc(gendiskp, field) \ - part_stat_add(gendiskp, field, 1) -#define part_stat_sub(gendiskp, field, subnd) \ - part_stat_add(gendiskp, field, -subnd) +#define part_stat_dec(part, field) \ + part_stat_add(part, field, -1) +#define part_stat_inc(part, field) \ + part_stat_add(part, field, 1) +#define part_stat_sub(part, field, subnd) \ + part_stat_add(part, field, -subnd) -#define part_stat_local_dec(gendiskp, field) \ - local_dec(&(part_stat_get(gendiskp, field))) -#define part_stat_local_inc(gendiskp, field) \ - local_inc(&(part_stat_get(gendiskp, field))) -#define part_stat_local_read(gendiskp, field) \ - local_read(&(part_stat_get(gendiskp, field))) -#define part_stat_local_read_cpu(gendiskp, field, cpu) \ - local_read(&(part_stat_get_cpu(gendiskp, field, cpu))) +#define part_stat_local_dec(part, field) \ + local_dec(&(part_stat_get(part, field))) +#define part_stat_local_inc(part, field) \ + local_inc(&(part_stat_get(part, field))) +#define part_stat_local_read(part, field) \ + local_read(&(part_stat_get(part, field))) +#define part_stat_local_read_cpu(part, field, cpu) \ + local_read(&(part_stat_get_cpu(part, field, cpu))) #endif /* _LINUX_PART_STAT_H */ -- 2.29.2 -- dm-devel mailing list dm-devel@redhat.com https://www.redhat.com/mailman/listinfo/dm-devel