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From: Kanchan Joshi <[email protected]>
To: Christoph Hellwig <[email protected]>
Cc: [email protected], [email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected],
	Anuj Gupta <[email protected]>
Subject: Re: [PATCH for-next v4 3/4] block: add helper to map bvec iterator for passthrough
Date: Tue, 6 Sep 2022 12:17:45 +0530	[thread overview]
Message-ID: <20220906064745.GB27127@test-zns> (raw)
In-Reply-To: <20220906063329.GA27127@test-zns>

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On Tue, Sep 06, 2022 at 12:03:29PM +0530, Kanchan Joshi wrote:
>On Tue, Sep 06, 2022 at 08:25:22AM +0200, Christoph Hellwig wrote:
>>On Mon, Sep 05, 2022 at 07:18:32PM +0530, Kanchan Joshi wrote:
>>>+static struct bio *bio_map_get(struct request *rq, unsigned int nr_vecs,
>>> 		gfp_t gfp_mask)
>>> {
>>>@@ -259,13 +252,31 @@ static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
>>> 		bio = bio_alloc_bioset(NULL, nr_vecs, opf, gfp_mask,
>>> 					&fs_bio_set);
>>> 		if (!bio)
>>>-			return -ENOMEM;
>>>+			return NULL;
>>
>>This context looks weird?  That bio_alloc_bioset should not be there,
>>as biosets are only used for file system I/O, which this is not.
>
>if you think it's a deal-breaker, maybe I can add a new bioset in nvme and
>pass that as argument to this helper. Would you prefer that over the
>current approach.

seems I responded without looking carefully. The bioset addition is not
part of this series. It got added earlier [1] [2], as part of optimizing
polled-io on file/passthru path.

[1] https://lore.kernel.org/linux-block/[email protected]/
[2] https://lore.kernel.org/linux-block/[email protected]/

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  reply	other threads:[~2022-09-06  6:57 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20220905135842epcas5p4835d74beb091f5f50490714d93fc58f2@epcas5p4.samsung.com>
2022-09-05 13:48 ` [PATCH for-next v4 0/4] fixed-buffer for uring-cmd/passthru Kanchan Joshi
     [not found]   ` <CGME20220905135846epcas5p4fde0fc96442adc3cf11319375ba2596b@epcas5p4.samsung.com>
2022-09-05 13:48     ` [PATCH for-next v4 1/4] io_uring: introduce io_uring_cmd_import_fixed Kanchan Joshi
2022-09-05 17:50       ` Jens Axboe
2022-09-05 17:53       ` Jens Axboe
     [not found]   ` <CGME20220905135848epcas5p445275a3af56a26a036878fe8a8bcb55f@epcas5p4.samsung.com>
2022-09-05 13:48     ` [PATCH for-next v4 2/4] io_uring: introduce fixed buffer support for io_uring_cmd Kanchan Joshi
2022-09-05 17:54       ` Jens Axboe
     [not found]   ` <CGME20220905135851epcas5p3d107b140fd6cba1feb338c1a31c4feb1@epcas5p3.samsung.com>
2022-09-05 13:48     ` [PATCH for-next v4 3/4] block: add helper to map bvec iterator for passthrough Kanchan Joshi
2022-09-06  6:25       ` Christoph Hellwig
2022-09-06  6:33         ` Kanchan Joshi
2022-09-06  6:47           ` Kanchan Joshi [this message]
2022-09-06  6:51           ` Christoph Hellwig
2022-09-06 13:06             ` Jens Axboe
     [not found]   ` <CGME20220905135854epcas5p2256848a964afec41f46502b0114698e2@epcas5p2.samsung.com>
2022-09-05 13:48     ` [PATCH for-next v4 4/4] nvme: wire up fixed buffer support for nvme passthrough Kanchan Joshi

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