From: Christoph Hellwig <hch@lst.de>
To: Kanchan Joshi <joshi.k@samsung.com>
Cc: Christoph Hellwig <hch@lst.de>,
axboe@kernel.dk, martin.petersen@oracle.com, kbusch@kernel.org,
brauner@kernel.org, asml.silence@gmail.com, dw@davidwei.uk,
io-uring@vger.kernel.org, linux-nvme@lists.infradead.org,
linux-block@vger.kernel.org, gost.dev@samsung.com,
Anuj Gupta <anuj20.g@samsung.com>
Subject: Re: [PATCH 04/10] block: avoid unpinning/freeing the bio_vec incase of cloned bio
Date: Thu, 2 May 2024 09:12:21 +0200 [thread overview]
Message-ID: <20240502071221.GA31379@lst.de> (raw)
In-Reply-To: <ebeca5f1-8d80-e4d4-cf45-9a14ef1413a5@samsung.com>
On Wed, May 01, 2024 at 06:32:45PM +0530, Kanchan Joshi wrote:
> Can you please tell what function(s) in bio data path that need this
> conversion?
> To me data path handling seems similar. Each cloned bio will lead to
> some amount of data transfer to pinned user-memory. The same is
> happening for meta transfer here.
Well, everywhere. e.g. for direct I/O everything is just driven from
the fs/direct-io.c and and fs/iomap/direct-io.c code without any
knowledge in the underlying driver if data has been pinned (no bounce
buffering in this case). Or for passthrough I/O none of the underlying
logic knows about the pinning or bounce buffering, everything is handled
in block/blk-map.c.
next prev parent reply other threads:[~2024-05-02 7:12 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20240425184649epcas5p42f6ddbfb1c579f043a919973c70ebd03@epcas5p4.samsung.com>
2024-04-25 18:39 ` [PATCH 00/10] Read/Write with meta/integrity Kanchan Joshi
2024-04-25 18:39 ` [PATCH 01/10] block: set bip_vcnt correctly Kanchan Joshi
2024-04-27 7:02 ` Christoph Hellwig
2024-04-27 14:16 ` Keith Busch
2024-04-29 10:59 ` Kanchan Joshi
2024-05-01 7:45 ` Christoph Hellwig
2024-05-01 8:03 ` Keith Busch
2024-04-25 18:39 ` [PATCH 02/10] block: copy bip_max_vcnt vecs instead of bip_vcnt during clone Kanchan Joshi
2024-04-27 7:03 ` Christoph Hellwig
2024-04-29 11:28 ` Kanchan Joshi
2024-04-29 12:04 ` Keith Busch
2024-04-29 17:07 ` Christoph Hellwig
2024-04-30 8:25 ` Keith Busch
2024-05-01 7:46 ` Christoph Hellwig
2024-05-01 7:50 ` Christoph Hellwig
2024-04-25 18:39 ` [PATCH 03/10] block: copy result back to user meta buffer correctly in case of split Kanchan Joshi
2024-04-27 7:04 ` Christoph Hellwig
2024-04-25 18:39 ` [PATCH 04/10] block: avoid unpinning/freeing the bio_vec incase of cloned bio Kanchan Joshi
2024-04-27 7:05 ` Christoph Hellwig
2024-04-29 11:40 ` Kanchan Joshi
2024-04-29 17:09 ` Christoph Hellwig
2024-05-01 13:02 ` Kanchan Joshi
2024-05-02 7:12 ` Christoph Hellwig [this message]
2024-05-03 12:01 ` Kanchan Joshi
2024-04-25 18:39 ` [PATCH 05/10] block, nvme: modify rq_integrity_vec function Kanchan Joshi
2024-04-27 7:18 ` Christoph Hellwig
2024-04-29 11:34 ` Kanchan Joshi
2024-04-29 17:11 ` Christoph Hellwig
2024-04-25 18:39 ` [PATCH 06/10] block: modify bio_integrity_map_user argument Kanchan Joshi
2024-04-27 7:19 ` Christoph Hellwig
2024-04-25 18:39 ` [PATCH 07/10] block: define meta io descriptor Kanchan Joshi
2024-04-25 18:39 ` [PATCH 08/10] io_uring/rw: add support to send meta along with read/write Kanchan Joshi
2024-04-26 14:25 ` Jens Axboe
2024-04-29 20:11 ` Kanchan Joshi
2024-04-25 18:39 ` [PATCH 09/10] block: add support to send meta buffer Kanchan Joshi
2024-04-26 15:21 ` Keith Busch
2024-04-29 11:47 ` Kanchan Joshi
2024-04-25 18:39 ` [PATCH 10/10] nvme: add separate handling for user integrity buffer Kanchan Joshi
2024-04-25 19:56 ` Keith Busch
2024-04-26 10:57 ` kernel test robot
2024-04-26 14:19 ` [PATCH 00/10] Read/Write with meta/integrity Jens Axboe
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