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Re: [PATCH] hw/block/nvme: conditionally enable DULBE for zoned namespac

From: Keith Busch
Subject: Re: [PATCH] hw/block/nvme: conditionally enable DULBE for zoned namespaces
Date: Thu, 14 Jan 2021 15:39:28 -0800

On Mon, Jan 11, 2021 at 07:09:52PM +0100, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
> The device uses the BDRV_BLOCK_ZERO flag to determine the "deallocated"
> status of logical blocks. Since the zoned namespaces command set
> specification defines that logical blocks SHALL be marked as deallocated
> when the zone is in the Empty or Offline states, DULBE can only be
> supported if the zone size is a multiple of the calculated deallocation
> granularity (reported in NPDG) which depends on the underlying block
> device cluster size (if applicable) or the configured
> discard_granularity.
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>

Looks good.

Reviewed-by: Keith Busch <kbusch@kernel.org>

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