From: Christoph Hellwig <hch@lst.de>
To: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"kbusch@kernel.org" <kbusch@kernel.org>,
"sagi@grimberg.me" <sagi@grimberg.me>,
Damien Le Moal <Damien.LeMoal@wdc.com>
Subject: Re: [PATCH V10 1/8] nvmet: trim args for nvmet_copy_ns_identifier()
Date: Wed, 10 Mar 2021 09:49:43 +0100 [thread overview]
Message-ID: <20210310084943.GA5838@lst.de> (raw)
In-Reply-To: <BYAPR04MB49654C66E5F4BC09418DC61C86929@BYAPR04MB4965.namprd04.prod.outlook.com>
On Tue, Mar 09, 2021 at 09:03:26PM +0000, Chaitanya Kulkarni wrote:
> Looking at the code again, this is not a generic copy function but this
> is a designated function for the identifier copy, and for each
> identifier we have a length parameter that has 1:1 mapping [1], so why
> pass that values for each call ?
The point is to keep the levels of abstraction sane. Right now
nvmet_copy_ns_identifier is a dumb copy function that doesn't know
about the type of the identifier copied, and the caller has all
information about each identifier, nicely together in a single line.
If you move the size derivation into nvmet_copy_ns_identifier everyone
adding a new identifier or just trying to understand the code needs
to deal with two functions. Due to the extra branches it will probably
also generate worse binary code.
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next prev parent reply other threads:[~2021-03-10 8:50 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-09 4:58 [PATCH V10 0/8] nvmet: add ZBD backend support Chaitanya Kulkarni
2021-03-09 4:58 ` [PATCH V10 1/8] nvmet: trim args for nvmet_copy_ns_identifier() Chaitanya Kulkarni
2021-03-09 11:34 ` Christoph Hellwig
2021-03-09 20:54 ` Chaitanya Kulkarni
2021-03-09 21:03 ` Chaitanya Kulkarni
2021-03-10 8:49 ` Christoph Hellwig [this message]
2021-03-10 8:52 ` Chaitanya Kulkarni
2021-03-09 4:58 ` [PATCH V10 2/8] nvmet: add NVM Command Set Identifier support Chaitanya Kulkarni
2021-03-09 11:37 ` Christoph Hellwig
2021-03-09 21:07 ` Chaitanya Kulkarni
2021-03-09 4:58 ` [PATCH V10 3/8] nvmet: add command set supported ctrl cap Chaitanya Kulkarni
2021-03-09 11:38 ` Christoph Hellwig
2021-03-09 21:09 ` Chaitanya Kulkarni
2021-03-10 7:05 ` Chaitanya Kulkarni
2021-03-10 7:14 ` hch
2021-03-09 4:58 ` [PATCH V10 4/8] nvmet: add ZBD over ZNS backend support Chaitanya Kulkarni
2021-03-09 11:41 ` Christoph Hellwig
2021-03-09 21:13 ` Chaitanya Kulkarni
2021-03-09 4:58 ` [PATCH V10 5/8] nvmet: add nvmet_req_bio put helper for backends Chaitanya Kulkarni
2021-03-09 4:58 ` [PATCH V10 6/8] nvme-core: check ctrl css before setting up zns Chaitanya Kulkarni
2021-03-09 11:42 ` Christoph Hellwig
2021-03-09 15:03 ` Christoph Hellwig
2021-03-10 1:14 ` Chaitanya Kulkarni
2021-03-09 4:58 ` [PATCH V10 7/8] nvme-core: add a helper to print css related error Chaitanya Kulkarni
2021-03-09 4:58 ` [PATCH V10 8/8] nvme: add comments to nvme_zns_alloc_report_buffer Chaitanya Kulkarni
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