* SiS 191 failure with MTU > 1496
@ 2009-05-29 16:44 Pascal Terjan
2009-05-29 16:50 ` Pascal Terjan
0 siblings, 1 reply; 6+ messages in thread
From: Pascal Terjan @ 2009-05-29 16:44 UTC (permalink / raw)
To: Francois Romieu; +Cc: netdev
On a laptop with such hardware, with default 1500 MTU I can't connect to
local machines, error bit LIMIT is set when receiving packets.
By decreasing the MTU to 1496 everything works fine.
Jun 28 20:03:13 localhost kernel: sis190 Gigabit Ethernet driver 1.2
loaded.
Jun 28 20:03:13 localhost kernel: sis190 0000:00:04.0: PCI INT A -> GSI
19 (level, low) -> IRQ 19
Jun 28 20:03:13 localhost kernel: 0000:00:04.0: Read MAC address from
EEPROM
Jun 28 20:03:13 localhost kernel: 0000:00:04.0: Error EEPROM read 0.
Jun 28 20:03:13 localhost kernel: 0000:00:04.0: Read MAC address from
APC.
Jun 28 20:03:13 localhost kernel: 0000:00:04.0: Realtek PHY RTL8201
transceiver at address 1.
Jun 28 20:03:13 localhost kernel: 0000:00:04.0: Using transceiver at
address 1 as default.
Jun 28 20:03:13 localhost kernel: 0000:00:04.0: SiS 191 PCI Gigabit
Ethernet adapter at f08c0c00 (IRQ: 19), 00:21:85:da:e1:51
Jun 28 20:03:13 localhost kernel: eth0: GMII mode.
Jun 28 20:03:13 localhost kernel: eth0: Enabling Auto-negotiation.
00:04.0 0200: 1039:0191 (rev 02)
Subsystem: 1462:63f8
Flags: bus master, medium devsel, latency 0, IRQ 19
Memory at fddfcc00 (32-bit, non-prefetchable) [size=128]
I/O ports at cc00 [size=128]
Capabilities: [40] Power Management version 2
Kernel driver in use: sis190
Kernel modules: sis190
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: SiS 191 failure with MTU > 1496
2009-05-29 16:44 SiS 191 failure with MTU > 1496 Pascal Terjan
@ 2009-05-29 16:50 ` Pascal Terjan
2009-05-29 17:00 ` Pascal Terjan
0 siblings, 1 reply; 6+ messages in thread
From: Pascal Terjan @ 2009-05-29 16:50 UTC (permalink / raw)
To: Francois Romieu; +Cc: netdev
Le vendredi 29 mai 2009 à 18:44 +0200, Pascal Terjan a écrit :
> On a laptop with such hardware, with default 1500 MTU I can't connect to
> local machines, error bit LIMIT is set when receiving packets.
>
> By decreasing the MTU to 1496 everything works fine.
>
This looks like a known issue
http://bugzilla.kernel.org/show_bug.cgi?id=10895
https://bugs.launchpad.net/ubuntu/+bug/369513
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: SiS 191 failure with MTU > 1496
2009-05-29 16:50 ` Pascal Terjan
@ 2009-05-29 17:00 ` Pascal Terjan
2009-05-29 22:30 ` Francois Romieu
0 siblings, 1 reply; 6+ messages in thread
From: Pascal Terjan @ 2009-05-29 17:00 UTC (permalink / raw)
To: Francois Romieu; +Cc: netdev
Le vendredi 29 mai 2009 à 18:50 +0200, Pascal Terjan a écrit :
> Le vendredi 29 mai 2009 à 18:44 +0200, Pascal Terjan a écrit :
> > On a laptop with such hardware, with default 1500 MTU I can't connect to
> > local machines, error bit LIMIT is set when receiving packets.
> >
> > By decreasing the MTU to 1496 everything works fine.
> >
>
> This looks like a known issue
>
> http://bugzilla.kernel.org/show_bug.cgi?id=10895
> https://bugs.launchpad.net/ubuntu/+bug/369513
Oh and even
http://bugzilla.kernel.org/show_bug.cgi?id=10694
Should I add some info there ?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: SiS 191 failure with MTU > 1496
2009-05-29 17:00 ` Pascal Terjan
@ 2009-05-29 22:30 ` Francois Romieu
2009-06-02 11:50 ` Pascal Terjan
0 siblings, 1 reply; 6+ messages in thread
From: Francois Romieu @ 2009-05-29 22:30 UTC (permalink / raw)
To: Pascal Terjan; +Cc: netdev
Pascal Terjan <pterjan@mandriva.com> :
[...]
> Oh and even
> http://bugzilla.kernel.org/show_bug.cgi?id=10694
Yes, it sucks.
> Should I add some info there ?
Not yet but could you retry with RX_BUF_SIZE set to 1544,
1528 and 1520 ?
--
Ueimor
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: SiS 191 failure with MTU > 1496
2009-05-29 22:30 ` Francois Romieu
@ 2009-06-02 11:50 ` Pascal Terjan
2009-06-02 14:14 ` Pascal Terjan
0 siblings, 1 reply; 6+ messages in thread
From: Pascal Terjan @ 2009-06-02 11:50 UTC (permalink / raw)
To: Francois Romieu; +Cc: netdev
Le samedi 30 mai 2009 à 00:30 +0200, Francois Romieu a écrit :
> Pascal Terjan <pterjan@mandriva.com> :
> [...]
> > Oh and even
> > http://bugzilla.kernel.org/show_bug.cgi?id=10694
>
> Yes, it sucks.
>
> > Should I add some info there ?
>
> Not yet but could you retry with RX_BUF_SIZE set to 1544,
> 1528 and 1520 ?
>
1544, 1528 and 1520 fail the same way
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: SiS 191 failure with MTU > 1496
2009-06-02 11:50 ` Pascal Terjan
@ 2009-06-02 14:14 ` Pascal Terjan
0 siblings, 0 replies; 6+ messages in thread
From: Pascal Terjan @ 2009-06-02 14:14 UTC (permalink / raw)
To: Francois Romieu; +Cc: netdev
Le mardi 02 juin 2009 à 13:50 +0200, Pascal Terjan a écrit :
> Le samedi 30 mai 2009 à 00:30 +0200, Francois Romieu a écrit :
> > Pascal Terjan <pterjan@mandriva.com> :
> > [...]
> > > Oh and even
> > > http://bugzilla.kernel.org/show_bug.cgi?id=10694
> >
> > Yes, it sucks.
> >
> > > Should I add some info there ?
> >
> > Not yet but could you retry with RX_BUF_SIZE set to 1544,
> > 1528 and 1520 ?
> >
>
> 1544, 1528 and 1520 fail the same way
By the way there is some strange code:
tp->rx_buf_sz = (mtu > RX_BUF_SIZE) ? mtu + ETH_HLEN + 8 : RX_BUF_SIZE;
Isn't there a (different from the one I'm interested in :) ) bug when
1500 < mtu <= RX_BUF_SIZE
Shouldn't the test be (mtu > ETH_DATA_LEN) ?
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2009-06-02 14:14 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-05-29 16:44 SiS 191 failure with MTU > 1496 Pascal Terjan
2009-05-29 16:50 ` Pascal Terjan
2009-05-29 17:00 ` Pascal Terjan
2009-05-29 22:30 ` Francois Romieu
2009-06-02 11:50 ` Pascal Terjan
2009-06-02 14:14 ` Pascal Terjan
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