netdev - Re: [PATCH] enic: add ethtool get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <9650C08B-4F8C-43F6-A87E-35EE6F7019FC@nutanix.com>
Date: Mon, 24 Jun 2024 18:36:58 +0000
From: Jon Kohler <jon@...anix.com>
To: Jakub Kicinski <kuba@...nel.org>
CC: Przemek Kitszel <przemyslaw.kitszel@...el.com>,
        Christian Benvenuti
	<benve@...co.com>,
        Satish Kharat <satishkh@...co.com>,
        "David S. Miller"
	<davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
	<pabeni@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Larysa Zaremba
	<larysa.zaremba@...el.com>
Subject: Re: [PATCH] enic: add ethtool get_channel support



> On Jun 20, 2024, at 3:58 PM, Jakub Kicinski <kuba@...nel.org> wrote:
> 
> On Thu, 20 Jun 2024 19:49:45 +0000 Jon Kohler wrote:
>>> channel is a bit of an old term, think about interrupts more than
>>> queues. ethtool man page has the most informative description.  
>> 
>> Thanks for the pointer on man ethtool - one question, Przemek had
>> brought up a good point that ethtool uapi says that combined queues
>> valid values start at 1; however, I don’t see anything that enforces that
>> point in the code or the man page.
>> 
>> Should I just omit that completely from the change, since the fields
>> are zero initialized anyhow?
> 
> Not sure what the comment about 1 to max is intending to communicate.
> But I'd guess it trying to convey that on SET driver doesn't have to
> worry about the value being crazy, if it sets max correctly.

Jakub - thanks for the pointer on the code suggestion. I’ll send out a v2
shortly. Note, check out enic_set_intr_mode. In both MSI and INTX cases
rq_count and wq_count will be 1, though in INTX the first INTR is
treated as combined.