From: Dan Williams <dan.j.williams@intel.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Mike Ximing Chen <mike.ximing.chen@intel.com>,
Netdev <netdev@vger.kernel.org>,
David Miller <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Subject: Re: [PATCH v10 00/20] dlb: introduce DLB device driver
Date: Thu, 11 Mar 2021 23:18:24 -0800 [thread overview]
Message-ID: <CAPcyv4gCMjoDCc2azLEc8QC5mVhdKeLibic9gj4Lm=Xwpft9ZA@mail.gmail.com> (raw)
In-Reply-To: <YEiLI8fGoa9DoCnF@kroah.com>
On Wed, Mar 10, 2021 at 1:02 AM Greg KH <gregkh@linuxfoundation.org> wrote:
>
> On Wed, Feb 10, 2021 at 11:54:03AM -0600, Mike Ximing Chen wrote:
> > Intel DLB is an accelerator for the event-driven programming model of
> > DPDK's Event Device Library[2]. The library is used in packet processing
> > pipelines that arrange for multi-core scalability, dynamic load-balancing,
> > and variety of packet distribution and synchronization schemes
>
> The more that I look at this driver, the more I think this is a "run
> around" the networking stack. Why are you all adding kernel code to
> support DPDK which is an out-of-kernel networking stack? We can't
> support that at all.
>
> Why not just use the normal networking functionality instead of this
> custom char-device-node-monstrosity?
Hey Greg,
I've come to find out that this driver does not bypass kernel
networking, and the kernel functionality I thought it bypassed, IPC /
Scheduling, is not even in the picture in the non-accelerated case. So
given you and I are both confused by this submission that tells me
that the problem space needs to be clarified and assumptions need to
be enumerated.
> What is missing from todays kernel networking code that requires this
> run-around?
Yes, first and foremost Mike, what are the kernel infrastructure gaps
and pain points that led up to this proposal?
next prev parent reply other threads:[~2021-03-12 7:19 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-10 17:54 [PATCH v10 00/20] dlb: introduce DLB device driver Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 01/20] dlb: add skeleton for DLB driver Mike Ximing Chen
2021-02-18 7:34 ` Chen, Mike Ximing
2021-02-18 7:52 ` gregkh
2021-02-18 15:37 ` Chen, Mike Ximing
2021-03-07 13:59 ` Chen, Mike Ximing
2021-02-10 17:54 ` [PATCH v10 02/20] dlb: initialize device Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 03/20] dlb: add resource and device initialization Mike Ximing Chen
2021-03-09 9:24 ` Greg KH
2021-03-10 1:33 ` Chen, Mike Ximing
2021-03-10 8:13 ` Greg KH
2021-03-10 20:26 ` Chen, Mike Ximing
2021-02-10 17:54 ` [PATCH v10 04/20] dlb: add device ioctl layer and first three ioctls Mike Ximing Chen
2021-03-09 9:26 ` Greg KH
2021-03-10 1:34 ` Chen, Mike Ximing
2021-02-10 17:54 ` [PATCH v10 05/20] dlb: add scheduling domain configuration Mike Ximing Chen
2021-03-09 9:28 ` Greg KH
2021-03-10 1:35 ` Chen, Mike Ximing
2021-02-10 17:54 ` [PATCH v10 06/20] dlb: add domain software reset Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 07/20] dlb: add low-level register reset operations Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 08/20] dlb: add runtime power-management support Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 09/20] dlb: add queue create, reset, get-depth ioctls Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 10/20] dlb: add register operations for queue management Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 11/20] dlb: add ioctl to configure ports and query poll mode Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 12/20] dlb: add register operations for port management Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 13/20] dlb: add port mmap support Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 14/20] dlb: add start domain ioctl Mike Ximing Chen
2021-03-09 9:29 ` Greg KH
2021-03-10 2:45 ` Chen, Mike Ximing
2021-03-10 8:14 ` Greg KH
2021-03-10 20:19 ` Dan Williams
2021-03-10 20:26 ` Chen, Mike Ximing
2021-02-10 17:54 ` [PATCH v10 15/20] dlb: add queue map, unmap, and pending unmap operations Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 16/20] dlb: add port map/unmap state machine Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 17/20] dlb: add static queue map register operations Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 18/20] dlb: add dynamic " Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 19/20] dlb: add queue unmap " Mike Ximing Chen
2021-02-10 17:54 ` [PATCH v10 20/20] dlb: queue map/unmap workqueue Mike Ximing Chen
2021-03-10 9:02 ` [PATCH v10 00/20] dlb: introduce DLB device driver Greg KH
2021-03-12 7:18 ` Dan Williams [this message]
2021-03-12 21:55 ` Chen, Mike Ximing
2021-03-13 1:39 ` Dan Williams
2021-03-15 20:04 ` Chen, Mike Ximing
2021-03-15 20:08 ` Chen, Mike Ximing
2021-03-15 20:18 ` Chen, Mike Ximing
2021-03-16 9:01 ` Greg KH
2021-05-12 19:07 ` Dan Williams
2021-05-14 14:33 ` Greg KH
2021-07-16 1:04 ` Chen, Mike Ximing
-- strict thread matches above, loose matches on Subject: below --
2021-01-27 22:56 Mike Ximing Chen
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