From: Pankaj Raghav <p.raghav@samsung.com> To: axboe@kernel.dk, damien.lemoal@opensource.wdc.com, pankydev8@gmail.com, dsterba@suse.com, hch@lst.de Cc: linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, jiangbo.365@bytedance.com, linux-block@vger.kernel.org, gost.dev@samsung.com, p.raghav@samsung.com, linux-kernel@vger.kernel.org, dm-devel@redhat.com, Luis Chamberlain <mcgrof@kernel.org>, Hannes Reinecke <hare@suse.de> Subject: [PATCH v4 01/13] block: make blkdev_nr_zones and blk_queue_zone_no generic for npo2 zsze Date: Mon, 16 May 2022 18:54:04 +0200 [thread overview] Message-ID: <20220516165416.171196-2-p.raghav@samsung.com> (raw) In-Reply-To: <20220516165416.171196-1-p.raghav@samsung.com> Adapt blkdev_nr_zones and blk_queue_zone_no function so that it can also work for non-power-of-2 zone sizes. As the existing deployments of zoned devices had power-of-2 assumption, power-of-2 optimized calculation is kept for those devices. There are no direct hot paths modified and the changes just introduce one new branch per call. Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Reviewed by: Adam Manzanares <a.manzanares@samsung.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Pankaj Raghav <p.raghav@samsung.com> --- block/blk-zoned.c | 13 ++++++++++--- include/linux/blkdev.h | 8 +++++++- 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/block/blk-zoned.c b/block/blk-zoned.c index 38cd840d8..140230134 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -111,16 +111,23 @@ EXPORT_SYMBOL_GPL(__blk_req_zone_write_unlock); * blkdev_nr_zones - Get number of zones * @disk: Target gendisk * - * Return the total number of zones of a zoned block device. For a block - * device without zone capabilities, the number of zones is always 0. + * Return the total number of zones of a zoned block device, including the + * eventual small last zone if present. For a block device without zone + * capabilities, the number of zones is always 0. */ unsigned int blkdev_nr_zones(struct gendisk *disk) { sector_t zone_sectors = blk_queue_zone_sectors(disk->queue); + sector_t capacity = get_capacity(disk); if (!blk_queue_is_zoned(disk->queue)) return 0; - return (get_capacity(disk) + zone_sectors - 1) >> ilog2(zone_sectors); + + if (is_power_of_2(zone_sectors)) + return (capacity + zone_sectors - 1) >> + ilog2(zone_sectors); + + return div64_u64(capacity + zone_sectors - 1, zone_sectors); } EXPORT_SYMBOL_GPL(blkdev_nr_zones); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 1b24c1fb3..22fe512ee 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -675,9 +675,15 @@ static inline unsigned int blk_queue_nr_zones(struct request_queue *q) static inline unsigned int blk_queue_zone_no(struct request_queue *q, sector_t sector) { + sector_t zone_sectors = blk_queue_zone_sectors(q); + if (!blk_queue_is_zoned(q)) return 0; - return sector >> ilog2(q->limits.chunk_sectors); + + if (is_power_of_2(zone_sectors)) + return sector >> ilog2(zone_sectors); + + return div64_u64(sector, zone_sectors); } static inline bool blk_queue_zone_is_seq(struct request_queue *q, -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Pankaj Raghav <p.raghav@samsung.com> To: axboe@kernel.dk, damien.lemoal@opensource.wdc.com, pankydev8@gmail.com, dsterba@suse.com, hch@lst.de Cc: p.raghav@samsung.com, gost.dev@samsung.com, jiangbo.365@bytedance.com, linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, dm-devel@redhat.com, Luis Chamberlain <mcgrof@kernel.org>, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org Subject: [dm-devel] [PATCH v4 01/13] block: make blkdev_nr_zones and blk_queue_zone_no generic for npo2 zsze Date: Mon, 16 May 2022 18:54:04 +0200 [thread overview] Message-ID: <20220516165416.171196-2-p.raghav@samsung.com> (raw) In-Reply-To: <20220516165416.171196-1-p.raghav@samsung.com> Adapt blkdev_nr_zones and blk_queue_zone_no function so that it can also work for non-power-of-2 zone sizes. As the existing deployments of zoned devices had power-of-2 assumption, power-of-2 optimized calculation is kept for those devices. There are no direct hot paths modified and the changes just introduce one new branch per call. Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Reviewed by: Adam Manzanares <a.manzanares@samsung.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Pankaj Raghav <p.raghav@samsung.com> --- block/blk-zoned.c | 13 ++++++++++--- include/linux/blkdev.h | 8 +++++++- 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/block/blk-zoned.c b/block/blk-zoned.c index 38cd840d8..140230134 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -111,16 +111,23 @@ EXPORT_SYMBOL_GPL(__blk_req_zone_write_unlock); * blkdev_nr_zones - Get number of zones * @disk: Target gendisk * - * Return the total number of zones of a zoned block device. For a block - * device without zone capabilities, the number of zones is always 0. + * Return the total number of zones of a zoned block device, including the + * eventual small last zone if present. For a block device without zone + * capabilities, the number of zones is always 0. */ unsigned int blkdev_nr_zones(struct gendisk *disk) { sector_t zone_sectors = blk_queue_zone_sectors(disk->queue); + sector_t capacity = get_capacity(disk); if (!blk_queue_is_zoned(disk->queue)) return 0; - return (get_capacity(disk) + zone_sectors - 1) >> ilog2(zone_sectors); + + if (is_power_of_2(zone_sectors)) + return (capacity + zone_sectors - 1) >> + ilog2(zone_sectors); + + return div64_u64(capacity + zone_sectors - 1, zone_sectors); } EXPORT_SYMBOL_GPL(blkdev_nr_zones); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 1b24c1fb3..22fe512ee 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -675,9 +675,15 @@ static inline unsigned int blk_queue_nr_zones(struct request_queue *q) static inline unsigned int blk_queue_zone_no(struct request_queue *q, sector_t sector) { + sector_t zone_sectors = blk_queue_zone_sectors(q); + if (!blk_queue_is_zoned(q)) return 0; - return sector >> ilog2(q->limits.chunk_sectors); + + if (is_power_of_2(zone_sectors)) + return sector >> ilog2(zone_sectors); + + return div64_u64(sector, zone_sectors); } static inline bool blk_queue_zone_is_seq(struct request_queue *q, -- 2.25.1 -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel
next prev parent reply other threads:[~2022-05-16 16:54 UTC|newest] Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <CGME20220516165418eucas1p2be592d9cd4b35f6b71d39ccbe87f3fef@eucas1p2.samsung.com> 2022-05-16 16:54 ` [PATCH v4 00/13] support non power of 2 zoned devices Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220516165419eucas1p104aadda60df323e6154bfc3b92103b7b@eucas1p1.samsung.com> 2022-05-16 16:54 ` Pankaj Raghav [this message] 2022-05-16 16:54 ` [dm-devel] [PATCH v4 01/13] block: make blkdev_nr_zones and blk_queue_zone_no generic for npo2 zsze Pankaj Raghav [not found] ` <CGME20220516165421eucas1p2515446ac290987bdb9af24ffb835b287@eucas1p2.samsung.com> 2022-05-16 16:54 ` [PATCH v4 02/13] block: allow blk-zoned devices to have non-power-of-2 zone size Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav 2022-05-16 19:05 ` Pankaj Raghav 2022-05-16 19:05 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220516165422eucas1p174acec28848a9c2178376f092af3fa1c@eucas1p1.samsung.com> 2022-05-16 16:54 ` [PATCH v4 03/13] nvme: zns: Allow ZNS drives that have non-power_of_2 " Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220516165424eucas1p2ee38cd64260539e5cac8d1fa4d0cba38@eucas1p2.samsung.com> 2022-05-16 16:54 ` [PATCH v4 04/13] nvmet: Allow ZNS target to support non-power_of_2 zone sizes Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav 2022-05-17 14:19 ` Johannes Thumshirn 2022-05-17 14:19 ` [dm-devel] " Johannes Thumshirn [not found] ` <CGME20220516165425eucas1p29fcd11d7051d9d3a9a9efc17cd3b6999@eucas1p2.samsung.com> 2022-05-16 16:54 ` [PATCH v4 05/13] btrfs: zoned: Cache superblock location in btrfs_zoned_device_info Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav 2022-05-16 21:58 ` David Sterba 2022-05-16 21:58 ` [dm-devel] " David Sterba 2022-05-17 7:55 ` Pankaj Raghav 2022-05-17 7:55 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220516165427eucas1p1cfd87ca44ec314ea1d2ddc8ece7259f9@eucas1p1.samsung.com> 2022-05-16 16:54 ` [PATCH v4 06/13] btrfs: zoned: Make sb_zone_number function non power of 2 compatible Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav 2022-05-17 6:53 ` Johannes Thumshirn 2022-05-17 6:53 ` [dm-devel] " Johannes Thumshirn 2022-05-17 11:51 ` David Sterba 2022-05-17 11:51 ` [dm-devel] " David Sterba [not found] ` <CGME20220516165428eucas1p1374b5f9592db3ca6a6551aff975537ce@eucas1p1.samsung.com> 2022-05-16 16:54 ` [PATCH v4 07/13] btrfs: zoned: use generic btrfs zone helpers to support npo2 zoned devices Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav 2022-05-17 12:30 ` David Sterba 2022-05-17 12:30 ` [dm-devel] " David Sterba 2022-05-18 9:40 ` Pankaj Raghav 2022-05-18 9:40 ` Pankaj Raghav 2022-05-18 11:21 ` David Sterba 2022-05-18 11:21 ` [dm-devel] " David Sterba 2022-05-19 4:13 ` Naohiro Aota 2022-05-19 4:13 ` [dm-devel] " Naohiro Aota [not found] ` <CGME20220516165429eucas1p272c8b4325a488675f08f2d7016aa6230@eucas1p2.samsung.com> 2022-05-16 16:54 ` [PATCH v4 08/13] btrfs:zoned: make sb for npo2 zone devices align with sb log offsets Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav 2022-05-17 6:50 ` Johannes Thumshirn 2022-05-17 6:50 ` Johannes Thumshirn 2022-05-17 8:00 ` Pankaj Raghav 2022-05-17 8:00 ` [dm-devel] " Pankaj Raghav 2022-05-17 12:42 ` David Sterba 2022-05-17 12:42 ` [dm-devel] " David Sterba 2022-05-18 9:15 ` Pankaj Raghav 2022-05-18 9:15 ` [dm-devel] " Pankaj Raghav 2022-05-19 7:57 ` Johannes Thumshirn 2022-05-19 7:57 ` [dm-devel] " Johannes Thumshirn 2022-05-20 9:06 ` Pankaj Raghav 2022-05-20 9:06 ` [dm-devel] " Pankaj Raghav 2022-05-20 9:15 ` Johannes Thumshirn 2022-05-20 9:15 ` [dm-devel] " Johannes Thumshirn 2022-05-19 7:59 ` Naohiro Aota 2022-05-19 7:59 ` [dm-devel] " Naohiro Aota 2022-05-20 9:09 ` Pankaj Raghav 2022-05-20 9:09 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220516165430eucas1p214cca8eaba1db2c98d947444cad4f18f@eucas1p2.samsung.com> 2022-05-16 16:54 ` [PATCH v4 09/13] btrfs: zoned: relax the alignment constraint for zoned devices Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220516165432eucas1p2e1ea74d44738e44745f49e37b6b9e503@eucas1p2.samsung.com> 2022-05-16 16:54 ` [PATCH v4 10/13] zonefs: allow non power of 2 " Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220516165434eucas1p12b178fb83cc93470933e3d72c40e9004@eucas1p1.samsung.com> 2022-05-16 16:54 ` [PATCH v4 11/13] null_blk: " Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav 2022-05-17 4:12 ` kernel test robot 2022-05-17 4:12 ` [dm-devel] " kernel test robot [not found] ` <CGME20220516165435eucas1p1dff8d9d039a76278ef1c09dba4b4e1fe@eucas1p1.samsung.com> 2022-05-16 16:54 ` [PATCH v4 12/13] null_blk: use zone_size_sects_shift for " Pankaj Raghav 2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220516165436eucas1p178d079302dae3a9fca696b13b0390deb@eucas1p1.samsung.com> 2022-05-16 16:54 ` [dm-devel] [PATCH v4 13/13] dm-zoned: ensure only power of 2 zone sizes are allowed Pankaj Raghav 2022-05-16 16:54 ` Pankaj Raghav 2022-05-17 8:10 ` [PATCH v4 00/13] support non power of 2 zoned devices Christoph Hellwig 2022-05-17 8:10 ` [dm-devel] " Christoph Hellwig 2022-05-17 9:18 ` Javier González 2022-05-17 9:18 ` [dm-devel] " Javier González 2022-05-18 8:00 ` Christoph Hellwig 2022-05-18 8:00 ` [dm-devel] " Christoph Hellwig 2022-05-19 15:25 ` Javier González 2022-05-19 15:25 ` [dm-devel] " Javier González 2022-05-17 15:34 ` Theodore Ts'o 2022-05-17 15:34 ` Theodore Ts'o 2022-05-18 23:06 ` Luis Chamberlain 2022-05-18 23:06 ` Luis Chamberlain 2022-05-19 3:08 ` Damien Le Moal 2022-05-19 3:08 ` Damien Le Moal 2022-05-19 3:12 ` Luis Chamberlain 2022-05-19 3:12 ` Luis Chamberlain 2022-05-19 3:19 ` Damien Le Moal 2022-05-19 3:19 ` Damien Le Moal 2022-05-19 7:34 ` Johannes Thumshirn 2022-05-19 7:34 ` Johannes Thumshirn 2022-05-20 3:47 ` Damien Le Moal 2022-05-20 3:47 ` Damien Le Moal 2022-05-20 6:07 ` Hannes Reinecke 2022-05-20 6:07 ` Hannes Reinecke 2022-05-20 6:27 ` Javier González 2022-05-20 6:27 ` Javier González 2022-05-20 6:41 ` Damien Le Moal 2022-05-20 6:41 ` Damien Le Moal [not found] ` <CGME20220520065941eucas1p105cf273ede995dc4bf92f3245fad09b1@eucas1p1.samsung.com> 2022-05-20 6:59 ` Javier González 2022-05-20 6:59 ` Javier González 2022-05-20 9:30 ` Pankaj Raghav 2022-05-20 9:30 ` Pankaj Raghav 2022-05-20 17:18 ` David Sterba 2022-05-20 17:18 ` David Sterba 2022-05-23 8:25 ` Pankaj Raghav 2022-05-23 8:25 ` Pankaj Raghav 2022-05-20 9:30 ` Johannes Thumshirn 2022-05-20 9:30 ` Johannes Thumshirn [not found] ` <CGME20220520101610eucas1p1822ca6014e2a1d55ae74476f83c4de1d@eucas1p1.samsung.com> 2022-05-20 10:16 ` Javier González 2022-05-20 10:16 ` Javier González 2022-05-16 13:39 Pankaj Raghav [not found] ` <CGME20220516133924eucas1p1817f306e3f2442088bf49ab513657cbe@eucas1p1.samsung.com> 2022-05-16 13:39 ` [PATCH v4 01/13] block: make blkdev_nr_zones and blk_queue_zone_no generic for npo2 zsze Pankaj Raghav 2022-05-16 13:54 ` Damien Le Moal
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