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From: Minchan Kim <minchan@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: "Jens Axboe" <axboe@kernel.dk>,
	"Justin Sanders" <justin@coraid.com>,
	"Josef Bacik" <josef@toxicpanda.com>,
	"Ilya Dryomov" <idryomov@gmail.com>,
	"Jack Wang" <jinpu.wang@cloud.ionos.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	"Jason Wang" <jasowang@redhat.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Stefan Hajnoczi" <stefanha@redhat.com>,
	"Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>,
	"Roger Pau Monné" <roger.pau@citrix.com>,
	"Mike Snitzer" <snitzer@redhat.com>, "Song Liu" <song@kernel.org>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	dm-devel@redhat.com, linux-block@vger.kernel.org,
	drbd-dev@lists.linbit.com, nbd@other.debian.org,
	ceph-devel@vger.kernel.org, xen-devel@lists.xenproject.org,
	linux-raid@vger.kernel.org, linux-nvme@lists.infradead.org,
	linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	sergey.senozhatsky.work@gmail.com
Subject: Re: [PATCH 61/78] zram:  do not call set_blocksize
Date: Wed, 25 Nov 2020 17:16:16 -0800
Message-ID: <20201126011616.GB57352@google.com> (raw)
In-Reply-To: <20201116145809.410558-62-hch@lst.de>

On Mon, Nov 16, 2020 at 03:57:52PM +0100, Christoph Hellwig wrote:
> set_blocksize is used by file systems to use their preferred buffer cache
> block size.  Block drivers should not set it.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Minchan Kim <minchan@kernel.org>

Thanks.

> ---
>  drivers/block/zram/zram_drv.c | 11 +----------
>  drivers/block/zram/zram_drv.h |  1 -
>  2 files changed, 1 insertion(+), 11 deletions(-)
> 
> diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
> index 3641434a9b154d..d00b5761ec0b21 100644
> --- a/drivers/block/zram/zram_drv.c
> +++ b/drivers/block/zram/zram_drv.c
> @@ -403,13 +403,10 @@ static void reset_bdev(struct zram *zram)
>  		return;
>  
>  	bdev = zram->bdev;
> -	if (zram->old_block_size)
> -		set_blocksize(bdev, zram->old_block_size);
>  	blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
>  	/* hope filp_close flush all of IO */
>  	filp_close(zram->backing_dev, NULL);
>  	zram->backing_dev = NULL;
> -	zram->old_block_size = 0;
>  	zram->bdev = NULL;
>  	zram->disk->fops = &zram_devops;
>  	kvfree(zram->bitmap);
> @@ -454,7 +451,7 @@ static ssize_t backing_dev_store(struct device *dev,
>  	struct file *backing_dev = NULL;
>  	struct inode *inode;
>  	struct address_space *mapping;
> -	unsigned int bitmap_sz, old_block_size = 0;
> +	unsigned int bitmap_sz;
>  	unsigned long nr_pages, *bitmap = NULL;
>  	struct block_device *bdev = NULL;
>  	int err;
> @@ -509,14 +506,8 @@ static ssize_t backing_dev_store(struct device *dev,
>  		goto out;
>  	}
>  
> -	old_block_size = block_size(bdev);
> -	err = set_blocksize(bdev, PAGE_SIZE);
> -	if (err)
> -		goto out;
> -
>  	reset_bdev(zram);
>  
> -	zram->old_block_size = old_block_size;
>  	zram->bdev = bdev;
>  	zram->backing_dev = backing_dev;
>  	zram->bitmap = bitmap;
> diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h
> index f2fd46daa76045..712354a4207c77 100644
> --- a/drivers/block/zram/zram_drv.h
> +++ b/drivers/block/zram/zram_drv.h
> @@ -118,7 +118,6 @@ struct zram {
>  	bool wb_limit_enable;
>  	u64 bd_wb_limit;
>  	struct block_device *bdev;
> -	unsigned int old_block_size;
>  	unsigned long *bitmap;
>  	unsigned long nr_pages;
>  #endif
> -- 
> 2.29.2
> 

  parent reply index

Thread overview: 113+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-16 14:56 cleanup updating the size of block devices v3 Christoph Hellwig
2020-11-16 14:56 ` [PATCH 01/78] block: remove the call to __invalidate_device in check_disk_size_change Christoph Hellwig
2020-11-16 14:56 ` [PATCH 02/78] loop: let set_capacity_revalidate_and_notify update the bdev size Christoph Hellwig
2020-11-16 14:56 ` [PATCH 03/78] nvme: " Christoph Hellwig
2020-11-16 14:56 ` [PATCH 04/78] sd: update the bdev size in sd_revalidate_disk Christoph Hellwig
2020-11-16 14:56 ` [PATCH 05/78] block: remove the update_bdev parameter to set_capacity_revalidate_and_notify Christoph Hellwig
2020-11-16 14:56 ` [PATCH 06/78] nbd: remove the call to set_blocksize Christoph Hellwig
2020-11-16 14:56 ` [PATCH 07/78] nbd: move the task_recv check into nbd_size_update Christoph Hellwig
2020-11-16 14:56 ` [PATCH 08/78] nbd: refactor size updates Christoph Hellwig
2020-11-16 14:57 ` [PATCH 09/78] nbd: validate the block size in nbd_set_size Christoph Hellwig
2020-11-16 14:57 ` [PATCH 10/78] nbd: use set_capacity_and_notify Christoph Hellwig
2020-11-16 14:57 ` [PATCH 11/78] aoe: don't call set_capacity from irq context Christoph Hellwig
2020-11-16 14:57 ` [PATCH 12/78] dm: use set_capacity_and_notify Christoph Hellwig
2021-02-12 15:45   ` Mike Snitzer
2021-02-16 11:46     ` Christoph Hellwig
2020-11-16 14:57 ` [PATCH 13/78] pktcdvd: " Christoph Hellwig
2020-11-16 14:57 ` [PATCH 14/78] nvme: use set_capacity_and_notify in nvme_set_queue_dying Christoph Hellwig
2020-11-16 14:57 ` [PATCH 15/78] drbd: use set_capacity_and_notify Christoph Hellwig
2020-11-16 14:57 ` [PATCH 16/78] rbd: " Christoph Hellwig
2020-11-16 14:57 ` [PATCH 17/78] rnbd: " Christoph Hellwig
2020-11-16 14:57 ` [PATCH 18/78] zram: " Christoph Hellwig
2020-11-16 14:57 ` [PATCH 19/78] dm-raid: " Christoph Hellwig
2020-11-16 14:57 ` [PATCH 20/78] md: " Christoph Hellwig
2020-11-16 14:57 ` [PATCH 21/78] md: remove a spurious call to revalidate_disk_size in update_size Christoph Hellwig
2020-11-16 14:57 ` [PATCH 22/78] virtio-blk: remove a spurious call to revalidate_disk_size Christoph Hellwig
2020-11-16 14:57 ` [PATCH 23/78] block: unexport revalidate_disk_size Christoph Hellwig
2020-11-16 14:57 ` [PATCH 24/78] mtd_blkdevs: don't override BLKFLSBUF Christoph Hellwig
2020-11-16 14:57 ` [PATCH 25/78] block: don't call into the driver for BLKFLSBUF Christoph Hellwig
2020-11-16 14:57 ` [PATCH 26/78] block: add a new set_read_only method Christoph Hellwig
2020-11-16 14:57 ` [PATCH 27/78] rbd: implement ->set_read_only to hook into BLKROSET processing Christoph Hellwig
2020-11-16 14:57 ` [PATCH 28/78] md: " Christoph Hellwig
2020-11-16 17:37   ` Song Liu
2020-11-16 14:57 ` [PATCH 29/78] dasd: " Christoph Hellwig
2020-11-16 14:57 ` [PATCH 30/78] block: don't call into the driver for BLKROSET Christoph Hellwig
2020-11-20  7:19   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 31/78] loop: use set_disk_ro Christoph Hellwig
2020-11-20  7:20   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 32/78] block: remove set_device_ro Christoph Hellwig
2020-11-20  7:20   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 33/78] block: remove __blkdev_driver_ioctl Christoph Hellwig
2020-11-20  7:22   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 34/78] block: propagate BLKROSET to all partitions Christoph Hellwig
2020-11-20  7:23   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 35/78] block: cleanup del_gendisk a bit Christoph Hellwig
2020-11-16 14:57 ` [PATCH 36/78] block: open code kobj_map into in block/genhd.c Christoph Hellwig
2020-11-16 14:57 ` [PATCH 37/78] block: split block_class_lock Christoph Hellwig
2020-11-16 14:57 ` [PATCH 38/78] block: rework requesting modules for unclaimed devices Christoph Hellwig
2020-11-16 14:57 ` [PATCH 39/78] block: add an optional probe callback to major_names Christoph Hellwig
2020-11-16 14:57 ` [PATCH 40/78] ide: remove ide_{,un}register_region Christoph Hellwig
2020-11-16 14:57 ` [PATCH 41/78] swim: don't call blk_register_region Christoph Hellwig
2020-11-16 14:57 ` [PATCH 42/78] sd: use __register_blkdev to avoid a modprobe for an unregistered dev_t Christoph Hellwig
2020-11-16 14:57 ` [PATCH 43/78] brd: use __register_blkdev to allocate devices on demand Christoph Hellwig
2020-11-16 14:57 ` [PATCH 44/78] loop: " Christoph Hellwig
2020-11-16 14:57 ` [PATCH 45/78] md: " Christoph Hellwig
2020-11-16 14:57 ` [PATCH 46/78] ide: switch to __register_blkdev for command set probing Christoph Hellwig
2020-11-16 14:57 ` [PATCH 47/78] floppy: use a separate gendisk for each media format Christoph Hellwig
2020-11-16 14:57 ` [PATCH 48/78] amiflop: use separate gendisks for Amiga vs MS-DOS mode Christoph Hellwig
2020-11-16 14:57 ` [PATCH 49/78] ataflop: use a separate gendisk for each media format Christoph Hellwig
2020-11-16 14:57 ` [PATCH 50/78] z2ram: reindent Christoph Hellwig
2020-11-16 14:57 ` [PATCH 51/78] z2ram: use separate gendisk for the different modes Christoph Hellwig
2020-11-16 14:57 ` [PATCH 52/78] block: switch gendisk lookup to a simple xarray Christoph Hellwig
2020-11-16 14:57 ` [PATCH 53/78] blk-cgroup: fix a hd_struct leak in blkcg_fill_root_iostats Christoph Hellwig
2020-11-20  7:25   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 54/78] block: remove a duplicate __disk_get_part prototype Christoph Hellwig
2020-11-20  7:25   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 55/78] block: change the hash used for looking up block devices Christoph Hellwig
2020-11-20  7:26   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 56/78] init: refactor name_to_dev_t Christoph Hellwig
2020-11-20  7:31   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 57/78] init: refactor devt_from_partuuid Christoph Hellwig
2020-11-20  7:33   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 58/78] init: cleanup match_dev_by_uuid and match_dev_by_label Christoph Hellwig
2020-11-20  7:34   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 59/78] mtip32xx: remove the call to fsync_bdev on removal Christoph Hellwig
2020-11-20  7:35   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 60/78] zram: remove the claim mechanism Christoph Hellwig
2020-11-20  7:37   ` Hannes Reinecke
2020-11-26  1:11   ` Minchan Kim
2020-11-26  9:59     ` Christoph Hellwig
2020-11-16 14:57 ` [PATCH 61/78] zram: do not call set_blocksize Christoph Hellwig
2020-11-20  7:38   ` Hannes Reinecke
2020-11-26  1:16   ` Minchan Kim [this message]
2020-11-16 14:57 ` [PATCH 62/78] loop: " Christoph Hellwig
2020-11-20  7:38   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 63/78] bcache: remove a superflous lookup_bdev all Christoph Hellwig
2020-11-16 14:57 ` [PATCH 64/78] dm: simplify flush_bio initialization in __send_empty_flush Christoph Hellwig
2020-11-20  7:41   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 65/78] dm: remove the block_device reference in struct mapped_device Christoph Hellwig
2020-11-20  7:43   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 66/78] block: keep a block_device reference for each hd_struct Christoph Hellwig
2020-11-20  7:50   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 67/78] block: simplify the block device claiming interface Christoph Hellwig
2020-11-20  7:51   ` Hannes Reinecke
2020-11-16 14:57 ` [PATCH 68/78] block: remove ->bd_contains Christoph Hellwig
2020-11-20  7:52   ` Hannes Reinecke
2020-11-16 14:58 ` [PATCH 69/78] block: remove the nr_sects field in struct hd_struct Christoph Hellwig
2020-11-20  7:55   ` Hannes Reinecke
2020-11-16 14:58 ` [PATCH 70/78] block: replace bd_mutex with a per-gendisk mutex Christoph Hellwig
2020-11-20  7:58   ` Hannes Reinecke
2020-11-16 14:58 ` [PATCH 71/78] block: add a bdev_kobj helper Christoph Hellwig
2020-11-20  7:59   ` Hannes Reinecke
2020-11-16 14:58 ` [PATCH 72/78] block: use disk_part_iter_exit in disk_part_iter_next Christoph Hellwig
2020-11-20  7:59   ` Hannes Reinecke
2020-11-16 14:58 ` [PATCH 73/78] block: use put_device in put_disk Christoph Hellwig
2020-11-20  8:02   ` Hannes Reinecke
2020-11-16 14:58 ` [PATCH 74/78] block: merge struct block_device and struct hd_struct Christoph Hellwig
2020-11-20  8:58   ` Hannes Reinecke
2020-11-16 14:58 ` [PATCH 75/78] block: stop using bdget_disk for partition 0 Christoph Hellwig
2020-11-16 14:58 ` [PATCH 76/78] filemap: use ->f_mapping over ->i_mapping consistently Christoph Hellwig
2020-11-16 14:58 ` [PATCH 77/78] fs: simplify the get_super_thawed interface Christoph Hellwig
2020-11-16 14:58 ` [PATCH 78/78] block: remove i_bdev Christoph Hellwig
2020-11-16 15:05 ` cleanup updating the size of block devices v3 Christoph Hellwig
2020-11-16 15:40 ` Jens Axboe

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