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From: Christoph Hellwig <hch@lst.de>
To: "Javier González" <javier@javigon.com>
Cc: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
	Damien Le Moal <Damien.LeMoal@wdc.com>,
	Hans Holmberg <hans@owltronix.com>,
	linux-block@vger.kernel.org
Subject: Re: [PATCH 8/8] block: set the zone size in blk_revalidate_disk_zones atomically
Date: Tue, 3 Dec 2019 16:18:08 +0100	[thread overview]
Message-ID: <20191203151808.GA558@lst.de> (raw)
In-Reply-To: <20191203140009.weqdw2kopzaizuoo@mpHalley.local>

On Tue, Dec 03, 2019 at 03:00:09PM +0100, Javier González wrote:
>> This change also allows to check for a power of two zone size in generic
>> code.
>
> I think however that this checks should remain at the driver level, or
> at least depend on a flag that signals that the zoned device is actually
> a power of two.

The block layer requires a power of two zone size / chunk size,
including having a BUG_ON for that requirement blk_queue_chunk_sectors.
I'd much rather have a proper check in the zone code with proper
diagnostics than triggering a BUG_ON..

  reply	other threads:[~2019-12-03 15:18 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-03  9:39 avoid out of bounds zone bitmap access Christoph Hellwig
2019-12-03  9:39 ` [PATCH 1/8] null_blk: fix zone size paramter check Christoph Hellwig
2019-12-03  9:39 ` [PATCH 2/8] null_blk: cleanup null_gendisk_register Christoph Hellwig
2019-12-03  9:39 ` [PATCH 3/8] block: remove the empty line at the end of blk-zoned.c Christoph Hellwig
2019-12-03  9:39 ` [PATCH 4/8] block: simplify blkdev_nr_zones Christoph Hellwig
2019-12-03  9:39 ` [PATCH 5/8] block: replace seq_zones_bitmap with conv_zones_bitmap Christoph Hellwig
2019-12-03 14:02   ` Javier González
2019-12-03  9:39 ` [PATCH 6/8] block: allocate the zone bitmaps lazily Christoph Hellwig
2019-12-03 14:03   ` Javier González
2019-12-03  9:39 ` [PATCH 7/8] block: don't handle bio based drivers in blk_revalidate_disk_zones Christoph Hellwig
2019-12-03 14:04   ` Javier González
2019-12-03  9:39 ` [PATCH 8/8] block: set the zone size in blk_revalidate_disk_zones atomically Christoph Hellwig
2019-12-03 14:00   ` Javier González
2019-12-03 15:18     ` Christoph Hellwig [this message]
2019-12-03 15:34       ` Javier González
2019-12-03 15:42         ` Christoph Hellwig
2019-12-03 17:17           ` Javier González
2019-12-03 16:00 ` avoid out of bounds zone bitmap access Jens Axboe

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