From: hch@lst.de (Christoph Hellwig)
Subject: [PATCH 06/17] block: introduce GENHD_FL_HIDDEN
Date: Sat, 28 Oct 2017 09:42:45 +0200 [thread overview]
Message-ID: <20171028074245.GA15510@lst.de> (raw)
In-Reply-To: <dc988a8a-8c88-fe20-34a0-de5cdd615b6b@huawei.com>
On Sat, Oct 28, 2017@03:20:07PM +0800, Guan Junxiong wrote:
> Think of some current advanced features of DM-Multipath combined with multipath-tools
> such as path-latency priority grouping, intermittent IO error accounting for path
> degradation, delayed or immediate or follow-over failback feature.
> Those features, which is significant in some scenario, need to use per-controller block devices.
> Therefore, I think it is worthy adding a CONFIG_NVME_MULTIPATHING knob to
> hide or show per-controller block devices.
>
> How about let me to add this this CONFIG_NVME_MULTIPATHING knob?
There is defintively not going to be a run-time nob, sorry. You've
spent this work on dm-multipath after the nvme group pretty clearly
said that this is not what we are going to support, and we have not
interest in supporting this. Especially as proper path discovery,
asymetic namespaces states and similar can only be supported properly
with the in-kernel code.
next prev parent reply other threads:[~2017-10-28 7:42 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-23 14:51 nvme multipath support V5 Christoph Hellwig
2017-10-23 14:51 ` [PATCH 01/17] block: move REQ_NOWAIT Christoph Hellwig
2017-10-23 14:51 ` [PATCH 02/17] block: add REQ_DRV bit Christoph Hellwig
2017-10-23 14:51 ` [PATCH 03/17] block: provide a direct_make_request helper Christoph Hellwig
2017-10-24 7:05 ` Hannes Reinecke
2017-10-24 17:57 ` Javier González
2017-10-23 14:51 ` [PATCH 04/17] block: add a blk_steal_bios helper Christoph Hellwig
2017-10-24 7:07 ` Hannes Reinecke
2017-10-24 8:44 ` Max Gurtovoy
2017-10-28 6:13 ` Christoph Hellwig
2017-10-23 14:51 ` [PATCH 05/17] block: don't look at the struct device dev_t in disk_devt Christoph Hellwig
2017-10-24 7:08 ` Hannes Reinecke
2017-10-23 14:51 ` [PATCH 06/17] block: introduce GENHD_FL_HIDDEN Christoph Hellwig
2017-10-24 7:18 ` Hannes Reinecke
2017-10-28 6:15 ` Christoph Hellwig
2017-10-24 21:40 ` Mike Snitzer
2017-10-28 6:38 ` Christoph Hellwig
2017-10-28 7:20 ` Guan Junxiong
2017-10-28 7:42 ` Christoph Hellwig [this message]
2017-10-28 10:09 ` Guan Junxiong
2017-10-29 8:00 ` Anish Jhaveri
2017-10-29 8:57 ` Christoph Hellwig
2017-10-28 14:17 ` Mike Snitzer
2017-10-29 10:01 ` Hannes Reinecke
2017-10-30 4:09 ` Guan Junxiong
2017-10-23 14:51 ` [PATCH 07/17] block: add a poll_fn callback to struct request_queue Christoph Hellwig
2017-10-24 7:20 ` Hannes Reinecke
2017-10-23 14:51 ` [PATCH 08/17] nvme: use kref_get_unless_zero in nvme_find_get_ns Christoph Hellwig
2017-10-24 7:21 ` Hannes Reinecke
2017-10-23 14:51 ` [PATCH 09/17] nvme: simplify nvme_open Christoph Hellwig
2017-10-24 7:21 ` Hannes Reinecke
2017-10-23 14:51 ` [PATCH 10/17] nvme: switch controller refcounting to use struct device Christoph Hellwig
2017-10-24 7:23 ` Hannes Reinecke
2017-10-23 14:51 ` [PATCH 11/17] nvme: get rid of nvme_ctrl_list Christoph Hellwig
2017-10-24 7:24 ` Hannes Reinecke
2017-10-23 14:51 ` [PATCH 12/17] nvme: check for a live controller in nvme_dev_open Christoph Hellwig
2017-10-24 7:25 ` Hannes Reinecke
2017-10-23 14:51 ` [PATCH 13/17] nvme: track subsystems Christoph Hellwig
2017-10-24 7:33 ` Hannes Reinecke
2017-10-23 14:51 ` [PATCH 14/17] nvme: introduce a nvme_ns_ids structure Christoph Hellwig
2017-10-24 7:27 ` Hannes Reinecke
2017-10-23 14:51 ` [PATCH 15/17] nvme: track shared namespaces Christoph Hellwig
2017-10-24 7:34 ` Hannes Reinecke
2017-10-23 14:51 ` [PATCH 16/17] nvme: implement multipath access to nvme subsystems Christoph Hellwig
2017-10-23 15:32 ` Sagi Grimberg
2017-10-23 16:57 ` Christoph Hellwig
2017-10-23 17:43 ` Sagi Grimberg
2017-10-24 7:43 ` Hannes Reinecke
2017-10-28 6:32 ` Christoph Hellwig
2017-10-30 3:37 ` Guan Junxiong
2017-11-02 18:22 ` Christoph Hellwig
2017-10-23 14:51 ` [PATCH 17/17] nvme: also expose the namespace identification sysfs files for mpath nodes Christoph Hellwig
2017-10-24 7:45 ` Hannes Reinecke
2017-10-28 6:20 ` Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2017-10-18 16:52 nvme multipath support V4 Christoph Hellwig
2017-10-18 16:52 ` [PATCH 06/17] block: introduce GENHD_FL_HIDDEN Christoph Hellwig
2017-10-19 8:31 ` Johannes Thumshirn
2017-10-19 12:45 ` Hannes Reinecke
2017-10-19 13:15 ` Christoph Hellwig
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