From: Christoph Hellwig <hch@lst.de>
To: Caleb Sander Mateos <csander@purestorage.com>
Cc: Keith Busch <kbusch@kernel.org>, 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 2/6] nvme: update nvme_id_ns OPTPERF constants
Date: Fri, 20 Feb 2026 17:07:41 +0100 [thread overview]
Message-ID: <20260220160741.GC15071@lst.de> (raw)
In-Reply-To: <20260220032809.758089-3-csander@purestorage.com>
On Thu, Feb 19, 2026 at 08:28:05PM -0700, Caleb Sander Mateos wrote:
> Since NVM Command Spec 1.1, OPTPERF comprises both bits 4 and 5 of
> NSFEAT in the Identify Namespace structure. Replace NVME_NS_FEAT_IO_OPT,
> which represented only bit 4, with NVME_NS_FEAT_OPTPERF_SHIFT and
> NVME_NS_FEAT_OPTPERF_MASK.
As you're deeper in this than me: do the older specs require the
other bit to be cleared to zero and this is all compatible? Or do
we need to guard it somehow?
Otherwise looks good.
next prev parent reply other threads:[~2026-02-20 16:07 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-20 3:28 [PATCH 0/6] nvme: improve discard_granularity spec compliance Caleb Sander Mateos
2026-02-20 3:28 ` [PATCH 1/6] nvme: add preferred I/O size fields to struct nvme_id_ns_nvm Caleb Sander Mateos
2026-02-20 16:06 ` Christoph Hellwig
2026-02-21 2:55 ` Caleb Sander Mateos
2026-02-23 13:24 ` Christoph Hellwig
2026-02-20 3:28 ` [PATCH 2/6] nvme: update nvme_id_ns OPTPERF constants Caleb Sander Mateos
2026-02-20 16:07 ` Christoph Hellwig [this message]
2026-02-20 16:17 ` Caleb Sander Mateos
2026-02-20 16:20 ` Christoph Hellwig
2026-02-20 3:28 ` [PATCH 3/6] nvme: always issue I/O Command Set specific Identify Namespace Caleb Sander Mateos
2026-02-20 16:08 ` Christoph Hellwig
2026-02-20 3:28 ` [PATCH 4/6] nvme: set discard_granularity from NPDG/NPDA Caleb Sander Mateos
2026-02-20 16:10 ` Christoph Hellwig
2026-02-20 3:28 ` [PATCH 5/6] nvmet: use NVME_NS_FEAT_OPTPERF_SHIFT Caleb Sander Mateos
2026-02-20 16:10 ` Christoph Hellwig
2026-02-20 3:28 ` [PATCH 6/6] nvmet: report NPDGL and NPDAL Caleb Sander Mateos
2026-02-20 16:11 ` Christoph Hellwig
2026-02-20 16:05 ` [PATCH 0/6] nvme: improve discard_granularity spec compliance Christoph Hellwig
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