From: "hch@infradead.org" <hch@infradead.org>
To: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
Cc: "hch@infradead.org" <hch@infradead.org>,
Bart Van Assche <bvanassche@acm.org>,
Jack Wang <jinpu.wang@cloud.ionos.com>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
"axboe@kernel.dk" <axboe@kernel.dk>,
"sagi@grimberg.me" <sagi@grimberg.me>,
"leon@kernel.org" <leon@kernel.org>,
"dledford@redhat.com" <dledford@redhat.com>,
"jgg@ziepe.ca" <jgg@ziepe.ca>,
"danil.kipnis@cloud.ionos.com" <danil.kipnis@cloud.ionos.com>,
"rpenyaev@suse.de" <rpenyaev@suse.de>,
"pankaj.gupta@cloud.ionos.com" <pankaj.gupta@cloud.ionos.com>
Subject: Re: [PATCH v11 15/26] block: reexport bio_map_kern
Date: Sun, 29 Mar 2020 23:28:05 -0700 [thread overview]
Message-ID: <20200330062805.GA21989@infradead.org> (raw)
In-Reply-To: <BYAPR04MB4965BA89446761D2C3D414D386CA0@BYAPR04MB4965.namprd04.prod.outlook.com>
On Sun, Mar 29, 2020 at 06:08:31PM +0000, Chaitanya Kulkarni wrote:
> > which bio_map_kerl is the wrong interfac given that it
> > uses bio_add_pc_page. Read, write and other non-passthrough requests
> > must use bio_add_page instead.
> >
>
> Since rw are most common operations, it'd be nice to have a helper
> function for REQ_OP_[READ|WRITE] to map and submit bio from data buffer
> with chaining to avoid code duplication in each driver which based on
> the bio_add_page().
>
> I'd be happy to send a patch for that if that is acceptable.
Well, there aren't a whole lot of driver submitting bios - it's mostly
file systems, and those often use shared code and/or have very specific
requirements.
I've started to factor some reasonably common code into self-contained
helpers with recent XFS work: xlog_map_iclog_data and xfs_rw_bdev.
Both could probably move to the block layer with a little more work,
but we'll have to be careful and actually find enough suitable users.
next prev parent reply other threads:[~2020-03-30 6:28 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-20 12:16 [PATCH v11 00/26] RTRS (former IBTRS) RDMA Transport Library and RNBD (former IBNBD) RDMA Network Block Device Jack Wang
2020-03-20 12:16 ` [PATCH v11 01/26] sysfs: export sysfs_remove_file_self() Jack Wang
2020-03-20 12:16 ` [PATCH v11 02/26] RDMA/rtrs: public interface header to establish RDMA connections Jack Wang
2020-03-20 12:16 ` [PATCH v11 03/26] RDMA/rtrs: private headers with rtrs protocol structs and helpers Jack Wang
2020-03-20 12:16 ` [PATCH v11 04/26] RDMA/rtrs: core: lib functions shared between client and server modules Jack Wang
2020-03-28 4:26 ` Bart Van Assche
2020-03-30 10:34 ` Jinpu Wang
2020-03-30 22:25 ` Bart Van Assche
2020-03-31 7:11 ` Jinpu Wang
2020-03-20 12:16 ` [PATCH v11 05/26] RDMA/rtrs: client: private header with client structs and functions Jack Wang
2020-03-20 12:16 ` [PATCH v11 06/26] RDMA/rtrs: client: main functionality Jack Wang
2020-03-20 12:16 ` [PATCH v11 07/26] RDMA/rtrs: client: statistics functions Jack Wang
2020-03-20 12:16 ` [PATCH v11 08/26] RDMA/rtrs: client: sysfs interface functions Jack Wang
2020-03-30 22:28 ` Bart Van Assche
2020-03-31 7:20 ` Jinpu Wang
2020-03-20 12:16 ` [PATCH v11 09/26] RDMA/rtrs: server: private header with server structs and functions Jack Wang
2020-03-20 12:16 ` [PATCH v11 10/26] RDMA/rtrs: server: main functionality Jack Wang
2020-03-20 12:16 ` [PATCH v11 11/26] RDMA/rtrs: server: statistics functions Jack Wang
2020-03-20 12:16 ` [PATCH v11 12/26] RDMA/rtrs: server: sysfs interface functions Jack Wang
2020-03-30 22:29 ` Bart Van Assche
2020-03-31 7:13 ` Jinpu Wang
2020-03-20 12:16 ` [PATCH v11 13/26] RDMA/rtrs: include client and server modules into kernel compilation Jack Wang
2020-03-20 12:16 ` [PATCH v11 14/26] RDMA/rtrs: a bit of documentation Jack Wang
2020-03-20 12:16 ` [PATCH v11 15/26] block: reexport bio_map_kern Jack Wang
2020-03-28 3:58 ` Bart Van Assche
2020-03-28 8:29 ` Christoph Hellwig
2020-03-28 16:16 ` Bart Van Assche
2020-03-29 15:05 ` Christoph Hellwig
2020-03-29 18:08 ` Chaitanya Kulkarni
2020-03-30 6:28 ` hch [this message]
2020-03-30 10:44 ` Jinpu Wang
2020-03-30 18:57 ` Chaitanya Kulkarni
2020-03-20 12:16 ` [PATCH v11 16/26] block/rnbd: private headers with rnbd protocol structs and helpers Jack Wang
2020-03-28 4:58 ` Bart Van Assche
2020-03-31 7:32 ` Jinpu Wang
2020-03-20 12:16 ` [PATCH v11 17/26] block/rnbd: client: private header with client structs and functions Jack Wang
2020-03-28 4:26 ` Bart Van Assche
2020-03-31 9:08 ` Jinpu Wang
2020-03-20 12:16 ` [PATCH v11 18/26] block/rnbd: client: main functionality Jack Wang
2020-03-28 4:45 ` Bart Van Assche
2020-03-31 9:23 ` Jinpu Wang
2020-04-02 16:27 ` Jinpu Wang
2020-03-28 4:59 ` Bart Van Assche
2020-03-31 9:25 ` Jinpu Wang
2020-03-31 14:12 ` Bart Van Assche
2020-03-31 14:20 ` Jinpu Wang
2020-03-20 12:16 ` [PATCH v11 19/26] block/rnbd: client: sysfs interface functions Jack Wang
2020-03-28 4:59 ` Bart Van Assche
2020-03-31 9:26 ` Jinpu Wang
2020-03-20 12:16 ` [PATCH v11 20/26] block/rnbd: server: private header with server structs and functions Jack Wang
2020-03-20 12:16 ` [PATCH v11 21/26] block/rnbd: server: main functionality Jack Wang
2020-03-28 17:40 ` Bart Van Assche
2020-03-31 9:29 ` Jinpu Wang
2020-03-31 15:32 ` Jinpu Wang
2020-03-20 12:16 ` [PATCH v11 22/26] block/rnbd: server: functionality for IO submission to file or block dev Jack Wang
2020-03-28 18:39 ` Bart Van Assche
2020-03-31 10:06 ` Jinpu Wang
2020-03-20 12:16 ` [PATCH v11 23/26] block/rnbd: server: sysfs interface functions Jack Wang
2020-03-28 19:31 ` Bart Van Assche
2020-03-28 23:06 ` Jason Gunthorpe
2020-03-30 13:14 ` Danil Kipnis
2020-03-20 12:16 ` [PATCH v11 24/26] block/rnbd: include client and server modules into kernel compilation Jack Wang
2020-03-28 19:34 ` Bart Van Assche
2020-03-31 7:23 ` Jinpu Wang
2020-03-20 12:16 ` [PATCH v11 25/26] block/rnbd: a bit of documentation Jack Wang
2020-03-28 19:40 ` Bart Van Assche
2020-03-30 10:17 ` Danil Kipnis
2020-03-20 12:16 ` [PATCH v11 26/26] MAINTAINERS: Add maintainers for RNBD/RTRS modules Jack Wang
2020-03-28 19:40 ` Bart Van Assche
2020-03-30 10:12 ` Danil Kipnis
2020-03-26 17:38 ` [PATCH v11 00/26] RTRS (former IBTRS) RDMA Transport Library and RNBD (former IBNBD) RDMA Network Block Device Jinpu Wang
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