From: Anuj Gupta <[email protected]>
To: Christoph Hellwig <[email protected]>
Cc: Kanchan Joshi <[email protected]>,
[email protected], [email protected], [email protected],
[email protected], [email protected],
[email protected]
Subject: Re: [PATCH for-next v10 5/7] block: factor out bio_map_get helper
Date: Thu, 29 Sep 2022 17:04:45 +0530 [thread overview]
Message-ID: <20220929113445.GD27633@test-zns> (raw)
In-Reply-To: <[email protected]>
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On Wed, Sep 28, 2022 at 07:31:21PM +0200, Christoph Hellwig wrote:
> On Tue, Sep 27, 2022 at 11:06:08PM +0530, Kanchan Joshi wrote:
> > Move bio allocation logic from bio_map_user_iov to a new helper
> > bio_map_get. It is named so because functionality is opposite of what is
> > done inside bio_map_put. This is a prep patch.
>
> I'm still not a fan of using bio_sets for passthrough and would be
> much happier if we could drill down what the problems with the
> slab per-cpu allocator are, but it seems like I've lost that fight
> against Jens..
>
> > +static struct bio *bio_map_get(struct request *rq, unsigned int nr_vecs,
> > gfp_t gfp_mask)
>
> But these names just seems rather misleading. Why not someting
> like blk_rq_map_bio_alloc and blk_mq_map_bio_put?
Agreed, will rename the alloc and put function in the next iteration
>
> Not really new in this code but a question to Jens: The existing
> bio_map_user_iov has no real upper bounds on the number of bios
> allocated, how does that fit with the very limited pool size of
> fs_bio_set?
--
Anuj Gupta
>
>
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next prev parent reply other threads:[~2022-09-29 11:50 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20220927174622epcas5p1685c0f97a7ee2ee13ba25f5fb58dff00@epcas5p1.samsung.com>
2022-09-27 17:36 ` [PATCH for-next v10 0/7] Fixed-buffer for uring-cmd/passthru Kanchan Joshi
[not found] ` <CGME20220927174626epcas5p4002acda6f0578ee314ee5e611b8d6662@epcas5p4.samsung.com>
2022-09-27 17:36 ` [PATCH for-next v10 1/7] io_uring: add io_uring_cmd_import_fixed Kanchan Joshi
[not found] ` <CGME20220927174628epcas5p21beda845f26eedeb538cb67e286954d4@epcas5p2.samsung.com>
2022-09-27 17:36 ` [PATCH for-next v10 2/7] io_uring: introduce fixed buffer support for io_uring_cmd Kanchan Joshi
[not found] ` <CGME20220927174631epcas5p12cd6ffbd7dad819b0af75733ce6cdd2c@epcas5p1.samsung.com>
2022-09-27 17:36 ` [PATCH for-next v10 3/7] nvme: refactor nvme_add_user_metadata Kanchan Joshi
2022-09-28 17:18 ` Christoph Hellwig
2022-09-29 11:28 ` Anuj Gupta
[not found] ` <CGME20220927174633epcas5p4d492bdebde981e2c019e30c47cf00869@epcas5p4.samsung.com>
2022-09-27 17:36 ` [PATCH for-next v10 4/7] nvme: refactor nvme_alloc_request Kanchan Joshi
2022-09-28 17:19 ` Christoph Hellwig
2022-09-29 11:30 ` Anuj Gupta
[not found] ` <CGME20220927174636epcas5p49008baa36dcbf2f61c25ba89c4707c0c@epcas5p4.samsung.com>
2022-09-27 17:36 ` [PATCH for-next v10 5/7] block: factor out bio_map_get helper Kanchan Joshi
2022-09-28 17:31 ` Christoph Hellwig
2022-09-28 17:49 ` Jens Axboe
2022-09-28 17:53 ` Jens Axboe
2022-09-29 11:34 ` Anuj Gupta [this message]
[not found] ` <CGME20220927174639epcas5p22b46aed144d81d82b2a9b9de586808ac@epcas5p2.samsung.com>
2022-09-27 17:36 ` [PATCH for-next v10 6/7] block: extend functionality to map bvec iterator Kanchan Joshi
2022-09-28 17:40 ` Christoph Hellwig
2022-09-29 11:33 ` Anuj Gupta
[not found] ` <CGME20220927174642epcas5p1dafa31776d4eb8180e18f149ed25640c@epcas5p1.samsung.com>
2022-09-27 17:36 ` [PATCH for-next v10 7/7] nvme: wire up fixed buffer support for nvme passthrough Kanchan Joshi
2022-09-28 17:59 ` Christoph Hellwig
2022-09-29 11:36 ` Anuj Gupta
2022-09-28 14:28 ` [PATCH for-next v10 0/7] Fixed-buffer for uring-cmd/passthru Jens Axboe
2022-09-28 17:12 ` Christoph Hellwig
2022-09-28 17:13 ` Jens Axboe
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