From: sagig@dev.mellanox.co.il (Sagi Grimberg)
Subject: [PATCH 06/18] nvme: split a new struct nvme_ctrl out of struct nvme_dev
Date: Tue, 20 Oct 2015 13:44:01 +0300 [thread overview]
Message-ID: <56261AF1.2040408@dev.mellanox.co.il> (raw)
In-Reply-To: <20151020102617.GA29824@lst.de>
On 10/20/2015 1:26 PM, Christoph Hellwig wrote:
> On Tue, Oct 20, 2015@01:19:45PM +0300, Sagi Grimberg wrote:
>> Can you explain why nvme_ctrl needs an additional struct device pointer?
>> (I understand it will go away from your statement "at the moment"
>> haven't read the rest of the patch set yet).
>
> No, it won't go away for the foreseeable future. I don't want to move
> any members used in the hot path to sturct nvme_ctrl so that drivers can
> be optimized in this path without impacting the generic code. Both for
> PCIe and Fabrics we need to squeeze the last bit of performance out and
> I don't want to have to cacheline optimize nvme_ctrl or even worse
> interactions between it and the containing structures.
>
I wasn't suggesting moving it to nvme_ctrl, I was suggesting to keep it
in nvme_dev and maybe add a helper have nvme_ctrl_to_dev(ctrl)->dev used
in slow paths. It would allow to remove the copy pointer in nvme_ctrl.
It's just a nit so I don't really mind keeping the copy.
next prev parent reply other threads:[~2015-10-20 10:44 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-16 5:58 nvme driver split V2 Christoph Hellwig
2015-10-16 5:58 ` [PATCH 01/18] nvme: add missing unmaps in nvme_queue_rq Christoph Hellwig
2015-10-20 10:04 ` Sagi Grimberg
2015-10-20 14:07 ` Busch, Keith
2015-10-16 5:58 ` [PATCH 02/18] nvme: move struct nvme_iod to pci.c Christoph Hellwig
2015-10-20 10:04 ` Sagi Grimberg
2015-10-16 5:58 ` [PATCH 03/18] nvme: split command submission helpers out of pci.c Christoph Hellwig
2015-10-20 10:07 ` Sagi Grimberg
2015-10-21 18:48 ` J Freyensee
2015-10-16 5:58 ` [PATCH 04/18] nvme: add a vendor field to struct nvme_dev Christoph Hellwig
2015-10-20 10:08 ` Sagi Grimberg
2015-10-21 18:58 ` J Freyensee
2015-10-21 19:10 ` Busch, Keith
2015-10-16 5:58 ` [PATCH 05/18] nvme: use offset instead of a struct for registers Christoph Hellwig
2015-10-16 17:30 ` Busch, Keith
2015-10-21 20:28 ` J Freyensee
2015-10-16 5:58 ` [PATCH 06/18] nvme: split a new struct nvme_ctrl out of struct nvme_dev Christoph Hellwig
2015-10-20 10:19 ` Sagi Grimberg
2015-10-20 10:26 ` Christoph Hellwig
2015-10-20 10:44 ` Sagi Grimberg [this message]
2015-10-20 11:30 ` Christoph Hellwig
2015-10-21 14:40 ` Sagi Grimberg
2015-10-21 21:23 ` J Freyensee
2015-10-21 22:51 ` Busch, Keith
2015-10-22 0:15 ` J Freyensee
2015-10-22 7:37 ` Christoph Hellwig
2015-10-16 5:58 ` [PATCH 07/18] nvme: simplify nvme_setup_prps calling convention Christoph Hellwig
2015-10-20 10:30 ` Sagi Grimberg
2015-10-16 5:58 ` [PATCH 08/18] nvme: refactor nvme_queue_rq Christoph Hellwig
2015-10-16 5:58 ` [PATCH 09/18] nvme: move nvme_error_status to common code Christoph Hellwig
2015-10-20 10:54 ` Sagi Grimberg
2015-10-16 5:58 ` [PATCH 10/18] nvme: move nvme_setup_flush and nvme_setup_rw " Christoph Hellwig
2015-10-20 11:01 ` Sagi Grimberg
2015-10-21 6:55 ` Christoph Hellwig
2015-10-21 14:41 ` Sagi Grimberg
2015-10-16 5:58 ` [PATCH 11/18] nvme: split __nvme_submit_sync_cmd Christoph Hellwig
2015-10-16 5:58 ` [PATCH 12/18] nvme: use the block layer for userspace passthrough metadata Christoph Hellwig
2015-10-16 20:04 ` Busch, Keith
2015-10-18 18:22 ` Christoph Hellwig
2015-10-16 5:58 ` [PATCH 13/18] nvme: move block_device_operations and ns/ctrl freeing to common code Christoph Hellwig
2015-10-16 5:58 ` [PATCH 14/18] nvme: add explicit quirk handling Christoph Hellwig
2015-10-16 5:58 ` [PATCH 15/18] nvme: add a common helper to read Identify Controller data Christoph Hellwig
2015-10-21 22:44 ` J Freyensee
2015-10-22 7:38 ` Christoph Hellwig
2015-10-16 5:58 ` [PATCH 16/18] nvme: move the call to nvme_init_identify earlier Christoph Hellwig
2015-10-16 5:58 ` [PATCH 17/18] nvme: move namespace scanning to common code Christoph Hellwig
2015-10-16 6:14 ` Ming Lin
2015-10-16 6:16 ` Christoph Hellwig
2015-10-21 23:27 ` J Freyensee
2015-10-22 7:39 ` Christoph Hellwig
2015-10-22 13:48 ` Busch, Keith
2015-10-22 16:30 ` Christoph Hellwig
2015-10-22 21:24 ` Busch, Keith
2015-10-23 5:41 ` Christoph Hellwig
2015-10-16 5:58 ` [PATCH 18/18] nvme: move chardev and sysfs interface " Christoph Hellwig
2015-10-22 0:11 ` J Freyensee
2015-10-22 7:45 ` Christoph Hellwig
2015-10-22 18:36 ` J Freyensee
2015-10-22 18:59 ` Jon Derrick
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