Re: KA46/48 vsbus DMA fallthrough

[David Brownlee <abs%absd.org@localhost>]

On 9 May 2015 at 18:38, Felix Deichmann <m4j0rd0m0%gmail.com@localhost> wrote:
> Am 09.05.2015 um 19:06 schrieb David Brownlee:
>>
>> Does the show/no-show network issue occur in earlier versions? If not,
>> it might help to work out when then issue was introduced.
>
> Just found:
>
> http://mail-index.netbsd.org/port-vax/2010/11/20/msg000953.html
>
> VLC and m60 have "le at vsbus" in common, so the problem I see seems to be
> present for quite some time now.
> It is also mentioned that a 5.1 kernel already had this problem (at least
> sporadically and/or for a single user).
>
> Do you think it would be a good idea to start searching/debugging in the
> match routine of if_le_vsbus.c now?

Looking at the match in if_le_vsbus I would be tempted to increase i
for the DELAY loop from 100 to 1000, then print out the value after
the loop to see how long it takes (and if the longer wait helps).

Good hunting :)