Skip site navigation (1)Skip section navigation (2)
Date:      Wed, 22 Oct 2008 13:30:57 -0200
From:      "Eduardo Meyer" <dudu.meyer@gmail.com>
To:        "Jeremy Chadwick" <koitsu@freebsd.org>
Cc:        stable@freebsd.org, pluknet <pluknet@gmail.com>
Subject:   Re: Check if interface supports Device Polling
Message-ID:  <d3ea75b30810220830k18782895o43cdfd6164b8ec19@mail.gmail.com>
In-Reply-To: <20081022152407.GA61546@icarus.home.lan>
References:  <d3ea75b30810211154kae89e00j57798a34bda78299@mail.gmail.com> <a31046fc0810211429o145395efxbcf80904f1fb90ec@mail.gmail.com> <d3ea75b30810220709i489525fbgf6a83eca1ff594c9@mail.gmail.com> <20081022151228.GA60664@icarus.home.lan> <20081022152407.GA61546@icarus.home.lan>

next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, Oct 22, 2008 at 1:24 PM, Jeremy Chadwick <koitsu@freebsd.org> wrote:
> On Wed, Oct 22, 2008 at 08:12:28AM -0700, Jeremy Chadwick wrote:
>> > # ifconfig -v rl0 caps
>> > Capabilities: 48
>>
>> The above patch is completely unnecessary.  The -m flag in ifconfig
>> will do what you want.
>>
>> However, the existing ifconfig code does not print POLLING as a
>> capability, which is where the bug truly lies.
>>
>> I'll provide a patch that extends the capability list properly, and will
>> allow you to determine a full capability list.
>
> I'm both correct and incorrect.
>
> Correct: ifconfig -m will show you want.  No need for the patch.
>
> Incorrect: I missed the "POLLING" part of #define IFCAPBITS in
> ifconfig.c -- it is in fact listed there.
>
> Maybe the polling bit is only made available if you've built a kernel
> with "option DEVICE_POLLING"?  For example, I can do "ifconfig em1
> polling", which returns no error, but "ifconfig -m em1" does not show
> POLLING.  (My kernel does NOT have DEVICE_POLLING defined.)
>
> In your above output, capabilities is 0x48, which means POLLING is
> available, and VLAN_MTU is available.  You did not provide us output of
> "ifconfig -m rl0", but I'd be inclined to believe "POLLING" is shown
> there... I hope.  :-)
>
> Also, it appears ifconfig does not print TOE4 or TOE6 capability bits;
> that's probably a missing feature.
>
> --
> | Jeremy Chadwick                                jdc at parodius.com |
> | Parodius Networking                       http://www.parodius.com/ |
> | UNIX Systems Administrator                  Mountain View, CA, USA |
> | Making life hard for others since 1977.              PGP: 4BD6C0CB |
>
>

You are right. My mistake, its there, in the "capabilities" line when
-m is issued.

Thank you Jeremy.


-- 
===========
Eduardo Meyer
pessoal: dudu.meyer@gmail.com
profissional: ddm.farmaciap@saude.gov.br



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?d3ea75b30810220830k18782895o43cdfd6164b8ec19>