From: Keith Busch <kbusch@kernel.org>
To: Caleb Sander Mateos <csander@purestorage.com>
Cc: Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@lst.de>,
Sagi Grimberg <sagi@grimberg.me>,
Chaitanya Kulkarni <kch@nvidia.com>,
linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 0/8] nvme: set discard_granularity from NPDG/NPDA
Date: Mon, 2 Mar 2026 11:54:38 -0700 [thread overview]
Message-ID: <aaXc7oun2IgjJ21F@kbusch-mbp> (raw)
In-Reply-To: <20260227202354.1012322-1-csander@purestorage.com>
On Fri, Feb 27, 2026 at 01:23:45PM -0700, Caleb Sander Mateos wrote:
> NVMe block devices always report the logical block size for the
> discard_granularity queue limit. However, more accurate values may be
> available in the NPDG/NPDA fields of the Identify Namespace structure or
> the NPDGL/NPDAL fields of the NVM Command Set Specific Identify
> Namespace structure. So use these values to compute discard_granularity.
>
> Also fix the use of the OPTPERF field to better comply with version 2.1
> of the NVMe spec.
>
> Update the target side to report NPDGL and NPDAL as well, in case the
> discard granularity doesn't fit in the 16-bit NPDG and NPDA fields.
This series looks good to me. I'll queue it up later this week. I just
want to get a pull request for my currently way-behind 7.0 nvme commits,
then rebase the tree for new stuff.
next prev parent reply other threads:[~2026-03-02 18:54 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-27 20:23 [PATCH v5 0/8] nvme: set discard_granularity from NPDG/NPDA Caleb Sander Mateos
2026-02-27 20:23 ` [PATCH v5 1/8] nvme: add preferred I/O size fields to struct nvme_id_ns_nvm Caleb Sander Mateos
2026-02-27 20:23 ` [PATCH v5 2/8] nvme: fold nvme_config_discard() into nvme_update_disk_info() Caleb Sander Mateos
2026-02-27 20:23 ` [PATCH v5 3/8] nvme: update nvme_id_ns OPTPERF constants Caleb Sander Mateos
2026-02-27 20:23 ` [PATCH v5 4/8] nvme: always issue I/O Command Set specific Identify Namespace Caleb Sander Mateos
2026-02-27 20:23 ` [PATCH v5 5/8] nvme: add from0based() helper Caleb Sander Mateos
2026-02-27 20:23 ` [PATCH v5 6/8] nvme: set discard_granularity from NPDG/NPDA Caleb Sander Mateos
2026-02-27 20:23 ` [PATCH v5 7/8] nvmet: use NVME_NS_FEAT_OPTPERF_SHIFT Caleb Sander Mateos
2026-02-27 20:23 ` [PATCH v5 8/8] nvmet: report NPDGL and NPDAL Caleb Sander Mateos
2026-03-02 18:54 ` Keith Busch [this message]
2026-03-02 19:04 ` [PATCH v5 0/8] nvme: set discard_granularity from NPDG/NPDA Caleb Sander Mateos
2026-03-23 15:29 ` Caleb Sander Mateos
2026-03-23 18:37 ` Keith Busch
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