On Sat, 23 Jan 1999, Matthew Dillon wrote:
> Yes, we're working on it in a sub-group.
>
> Since the panic message is a new one -- it's one I added that never
> existed
> in -3.x, it is possible that the bug is not related to my VM stuff but
> related to something else going on.
>
> I've found a number of other bugs in the greater VM system which I am
> comitting fixes for, *BUT* I don't think any of them are related to this
> particular panic.
>
> I am also comitting some very strict KASSERT checking to try to catch
> the problem earlier. Everyone running 4.x kernels should add the
> following
Ahem, would you kindly define 'everyone'?
> options to your kernel config:
>
> options INVARIANTS
> options INVARIANT_SUPPORT
>
>
> -Matt
> Matthew Dillon
> <dil...@backplane.com>
>
> :On Sun, 24 Jan 1999, Peter Wemm wrote:
> :
> :[..]
> :> Oh, one other thing that occurred to me.. Under 4.0-current, I regularly
> :> (ie: within 30 seconds of boot) get if_de tranmitter underflows. My
> :> console corruption was happening at the instant that de0 was being
> :> configured with ifconfig. exmh is running to a remote display over that
> :> de0 interface.
> :
> :Here too... pretty quickly after boot on a SMP machine (current as of Jan
> :12) that pushes quite a bit of traffic, the following messages appear:
> :
> :de0: abnormal interrupt: transmit underflow (raising TX threshold to 96|256)
> :de0: abnormal interrupt: transmit underflow (raising TX threshold to 128|512)
> :de0: abnormal interrupt: transmit underflow (raising TX threshold to
> 160|1024)
> :
> :The card is:
> :
> :de0: <Digital 21140A Fast Ethernet> rev 0x22 int a irq 16 on pci0.12.0
> :de0: 21140A [10-100Mb/s] pass 2.2
> :de0: address 00:c0:f0:1f:5d:0d
> :de0: enabling Full Duplex 100baseTX port
> :
> :Actually a Kingston clone, not a real DEC (so 1/5th of the price - but the
> :receiver doesn't go audibly *click* when it's autosensing).
> :
> :So far I've gotten this message once:
> :
> :de0: abnormal interrupt: transmit underflow (switching to store-and-forward
> mode)
> :
> :Any harm in them, or can I safely ignore them? Would it be a good idea to
> :raise the TX threshold by default, if only to avoid the messages?
> :It's plugged into a Catalyst switch, if it makes any difference...
> :
> :
> : -- Niels.
> :
> :
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> :
>
>
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