Re[2]: e1000 problems in 2.6.x

Re[2]: e1000 problems in 2.6.x

[Klaus Dittrich]

I have a Tyan-S2665 mobo which has an intergrated
e1000 and I never saw such errors with 2.6 kernels. 

I use it with 100-MBit Full-Duplex in a switched 
private network.

CONFIG_IP_MULTICAST=y
CONFIG_E1000=y
CONFIG_E1000_NAPI=y

-- 
Klaus

Re[3]: e1000 problems in 2.6.x

[Elikster]

Hello Klaus,

   Hmmm..that might explains it, since I don't use NAPI enabled on the E1000 and it works fine without in the 2.4.x series kernels, but under 2.6, it barfs half the time.

Sunday, February 15, 2004, 8:20:57 AM, you wrote:

KD> I have a Tyan-S2665 mobo which has an intergrated
KD> e1000 and I never saw such errors with 2.6 kernels. 

KD> I use it with 100-MBit Full-Duplex in a switched 
KD> private network.

KD> CONFIG_IP_MULTICAST=y
KD> CONFIG_E1000=y
KD> CONFIG_E1000_NAPI=y




-- 
Best regards,
 Elikster                            mailto:elik@webspires.com

Re: e1000 problems in 2.6.x

[Steve Simitzis]

that doesn't explain it for me. i have NAPI enabled in the kernel, and
i still have problems in 2.6.x, and not in 2.4.22.

CONFIG_E1000=m
CONFIG_E1000_NAPI=y

:(

On 02/15/04, Elikster <elik@webspires.com> wrote: 

> Hello Klaus,
> 
>    Hmmm..that might explains it, since I don't use NAPI enabled on the E1000 and it works fine without in the 2.4.x series kernels, but under 2.6, it barfs half the time.
> 
> Sunday, February 15, 2004, 8:20:57 AM, you wrote:
> 
> KD> I have a Tyan-S2665 mobo which has an intergrated
> KD> e1000 and I never saw such errors with 2.6 kernels. 
> 
> KD> I use it with 100-MBit Full-Duplex in a switched 
> KD> private network.
> 
> KD> CONFIG_IP_MULTICAST=y
> KD> CONFIG_E1000=y
> KD> CONFIG_E1000_NAPI=y
> 
> 
> 
> 
> -- 
> Best regards,
>  Elikster                            mailto:elik@webspires.com
> 
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-- 

steve simitzis : /sim' - i - jees/
          pala : saturn5 productions
 www.steve.org : 415.282.9979
  hath the daemon spawn no fire?

RE: e1000 problems in 2.6.x

[Feldman, Scott]

> another oddity is that even after forcing my interfaces to 
> 100 Mbps full duplex, my switch is reporting half duplex. 
> again, this only happens in 2.6.x. when running 2.4.22, full 
> duplex is properly negotiated between the e1000 and my switch.

Are you forcing both the e1000 interfaces and the switch ports to the
same forced settings?  A duplex mismatch would cause problems, but I'm
not sure why this is happening for 2.6 only.  What happens if you don't
force settings, and just rely on autoneg?  (Again, on both ends of the
wire).

-scott

Re: e1000 problems in 2.6.x

[Steve Simitzis]

i should have mentioned in my email that i tried every combination of
settings: auto-neg on the box and forced on the switch, both forced
(to the same settings, of course), forced on the box with auto-neg on
the switch, and auto-neg on both sides. in all cases, the result was
the same: RX packet errors and the same watchdog messages. what i thought
was particularly strange was that the switch refused to auto-negotiate
full duplex.

(someone on another list suggested to try booting with the noapic
option, which i tried for good measure, even though i don't see
how that could have helped. again, no improvement.)

i was initially tempted to assume they were hardware problems, until
i noticed that the problems only appeared when running a 2.6 kernel.
also, the machines are only a few months old, so i'm assuming that
all the hardware is modern enough to do the right thing.

if there's anything you'd recommend trying out, please let me know.
i considered trying to run the 2.4.22 driver in a 2.6 installation,
but i didn't know if any of the driver code depended on anything else
elsewhere in the kernel source.

On 02/14/04, "Feldman, Scott" <scott.feldman@intel.com> wrote: 

> > another oddity is that even after forcing my interfaces to 
> > 100 Mbps full duplex, my switch is reporting half duplex. 
> > again, this only happens in 2.6.x. when running 2.4.22, full 
> > duplex is properly negotiated between the e1000 and my switch.
> 
> Are you forcing both the e1000 interfaces and the switch ports to the
> same forced settings?  A duplex mismatch would cause problems, but I'm
> not sure why this is happening for 2.6 only.  What happens if you don't
> force settings, and just rely on autoneg?  (Again, on both ends of the
> wire).
> 
> -scott

-- 

steve simitzis : /sim' - i - jees/
          pala : saturn5 productions
 www.steve.org : 415.282.9979
  hath the daemon spawn no fire?

Re: e1000 problems in 2.6.x

[Bill Davidsen]

Steve Simitzis wrote:
> i should have mentioned in my email that i tried every combination of
> settings: auto-neg on the box and forced on the switch, both forced
> (to the same settings, of course), forced on the box with auto-neg on
> the switch, and auto-neg on both sides. in all cases, the result was
> the same: RX packet errors and the same watchdog messages. what i thought
> was particularly strange was that the switch refused to auto-negotiate
> full duplex.
> 
> (someone on another list suggested to try booting with the noapic
> option, which i tried for good measure, even though i don't see
> how that could have helped. again, no improvement.)
> 
> i was initially tempted to assume they were hardware problems, until
> i noticed that the problems only appeared when running a 2.6 kernel.
> also, the machines are only a few months old, so i'm assuming that
> all the hardware is modern enough to do the right thing.
> 
> if there's anything you'd recommend trying out, please let me know.
> i considered trying to run the 2.4.22 driver in a 2.6 installation,
> but i didn't know if any of the driver code depended on anything else
> elsewhere in the kernel source.
> 
> On 02/14/04, "Feldman, Scott" <scott.feldman@intel.com> wrote: 
> 
> 
>>>another oddity is that even after forcing my interfaces to 
>>>100 Mbps full duplex, my switch is reporting half duplex. 
>>>again, this only happens in 2.6.x. when running 2.4.22, full 
>>>duplex is properly negotiated between the e1000 and my switch.
>>
>>Are you forcing both the e1000 interfaces and the switch ports to the
>>same forced settings?  A duplex mismatch would cause problems, but I'm
>>not sure why this is happening for 2.6 only.  What happens if you don't
>>force settings, and just rely on autoneg?  (Again, on both ends of the
>>wire).

1 - check your cables in case 2.6 is checking (or not) something
2 - set your NIC half to match the switch and see if there's a different 
problem.

Switches and NICs, especially nice new ones, don't always or even 
usually auto-auto, at least with any of the stuff I have. I have one 
system which works well full when the switch negotiates full and the NIC 
gets half. Any other force usually works poorly. If the NIC comes up 
helf just kick it into full in rc.local (ethtool, mii-tool, whatever) as 
long as the switch convinces itself that it's full.

I see this with 2.4 as well, so I'm familiar if not expert.

-- 
bill davidsen <davidsen@tmr.com>
   CTO TMR Associates, Inc
   Doing interesting things with small computers since 1979

Re[2]: e1000 problems in 2.6.x

[Elikster]

Hello Bill,

    You are not alone.  It happened to all boxes with Intel E1000 network cards and integrated.  It happened on 2.6.2 kernel version and I downgraded back to 2.4.24 version and it was running fine.  The problems I experienced is network lag and lot of network disconnects and such.  It is the kernel 2.6.2 that this problem showed up.

   I haven't tried the latest versions yet that Linus just released to see if they fixed that issue yet.

Saturday, February 14, 2004, 8:22:43 PM, you wrote:

BD> Steve Simitzis wrote:
>> i should have mentioned in my email that i tried every combination of
>> settings: auto-neg on the box and forced on the switch, both forced
>> (to the same settings, of course), forced on the box with auto-neg on
>> the switch, and auto-neg on both sides. in all cases, the result was
>> the same: RX packet errors and the same watchdog messages. what i thought
>> was particularly strange was that the switch refused to auto-negotiate
>> full duplex.



-- 
Best regards,
 Elikster                            mailto:elik@webspires.com