[lkml]   [2019]   [Dec]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v6 14/25] rtrs: a bit of documentation
On 2019-12-30 02:29, Jack Wang wrote:
> diff --git a/drivers/infiniband/ulp/rtrs/README b/drivers/infiniband/ulp/rtrs/README

Other kernel driver documentation exists under the Documentation/
directory. Should this README file perhaps be moved to a subdirectory of
the Documentation/ directory?

> +****************************
> +InfiniBand Transport (RTRS)
> +****************************

The abbreviation does not match the full title. Do you agree that this
is confusing?

> +RTRS is used by the RNBD (Infiniband Network Block Device) modules.

Is RNBD an RDMA or an InfiniBand network block device?

> +
> +==================
> +Transport protocol
> +==================
> +
> +Overview
> +--------
> +An established connection between a client and a server is called rtrs
> +session. A session is associated with a set of memory chunks reserved on the
> +server side for a given client for rdma transfer. A session
> +consists of multiple paths, each representing a separate physical link
> +between client and server. Those are used for load balancing and failover.
> +Each path consists of as many connections (QPs) as there are cpus on
> +the client.
> +
> +When processing an incoming rdma write or read request rtrs client uses memory

A quote from
"Only RDMA writes with immediate". Has the wire protocol perhaps been
changed such that both RDMA reads and writes are used? I haven't found
any references to RDMA reads in the "IO path" section in this file. Did
I perhaps overlook something?



 \ /
  Last update: 2019-12-31 00:20    [W:0.085 / U:0.472 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site