[HECnet] DECnet broken with 4.4.0-151 kernel

[John Forecast]

Probably more like overnight on a Pi3B+. You might be able to speed things up by putting swap out on a USB thumb drive - doing the recommended “make -j4” uses up a lot of memory.

I just tried to build the code that I sent around on the Buster version Raspbian and it blows up trying to compile DECnet - looks like the timer infrastructure that protocol modules/drivers use has been “restructured” so I’ve got some work to do.

  John.


> On Jun 27, 2019, at 8:17 PM, Gregg Levine <gregg.drwho8 at gmail.com> wrote:
> 
> Hello!
> Thank you for the files. We are aware that even on a decently sized
> Pi, such as the Pi3, building a new kernel which for example on my 20
> year old P3 Intel machine takes just about an hour, on the Pi last I
> had heard its something on the order of all day. And that's on it
> mind. I've no idea how long it takes to cross compile a kernel via
> either a VM of whatever release name matches the date you selected for
> your match. I'm not sure what I am going to do, I had originally some
> idea to setup an AWS instance of Debian (which presupposes that it
> exists) and do the whole thing in there.
> 
> Suggests please folks?
> -----
> Gregg C Levine gregg.drwho8 at gmail.com
> "This signature fought the Time Wars, time and again."
> 
> On Thu, Jun 27, 2019 at 6:13 PM John Forecast <john at forecast.name> wrote:
>> 
>> Old versions of Raspbian can be downloaded from:
>> 
>>        <http://downloads.raspberrypi.org/raspbian/images/>
>> 
>> Given the dates on my file system, I would say “raspbian-2018-06-29”. You can upgrade the userland code but don’t update the kernel after you build the modified version.
>> 
>>  John.
>> 
>>> On Jun 27, 2019, at 5:23 PM, Tony Blews <tonyblews at gmail.com> wrote:
>>> 
>>> I've got a spare Pi I was about to get going and try this on... which
>>> is the best version of Raspbian to go for?
>>> 
>>> On 26/06/2019, John Forecast <john at forecast.name> wrote:
>>> 
>>>> 
>>>> My reply with an attached .zip file did not seems to make it so I’ve made it
>>>> available through dropbox:
>>>> 
>>>>     <https://www.dropbox.com/s/apmy08ydd9jjo6e/decnet-6_25_2019.zip?dl=0
>>>> <https://www.dropbox.com/s/apmy08ydd9jjo6e/decnet-6_25_2019.zip?dl=0>>
>>>> 
>>>> This is a snapshot of my decnet directory and dnprogs from about a year ago
>>>> when I got this working. The base kernel was cloned by:
>>>> 
>>>>     git clone —depth=1 -branch rpi-4.14.y https://github.com/raspberrypi/linux
>>>> <https://github.com/raspberrypi/linux>
>>>> 
>>>> Extract all the files from the above zip file and:
>>>> 
>>>> 1. Copy files from the zip file include directory to <kernel>/include/net
>>>> 
>>>> 2. Replace the <kernel>/net/decnet directory with the zip file decnet
>>>> directory
>>>> 
>>>> 3. Config to add decnet support and rebuild kernel+modules
>>>> 
>>>> I have no idea if this will work with newer kernels.
>>>> 
>>>> I made a few changes to the original source code I received:
>>>> 
>>>> Kernel code:
>>>> 
>>>>     Added special handling for the 0 area:
>>>> 
>>>>             Connect to 0.0 connects to the local node
>>>>             Connect to 0.n connects to node “n” in the local node’s area
>>>> 
>>>> Utility programs:
>>>> 
>>>>     Fixed a number of bugs in cterm and DAP especially related to talking to
>>>> Tops-10.
>>>> 
>>>>     Allow the DAP utilities (dncopy, dntype etc) to use DECnet-Ultrix syntax
>>>> for specifying access control infomation:
>>>> 
>>>>             node/username/password/account::
>>>> 
>>>>     which avoids the double quoting required to use the VMS syntax on Linux. To
>>>> enable this feature, create an environment variable called
>>>>     USE_ULTRIX_SYNTAX
>>>> 
>>>> Given that Raspberry Pi just released their version of Debian Buster which
>>>> uses kernel 4.19.x I’ll probably take a look at getting running there and
>>>> create a github repository for the changes. I need to finish my current
>>>> project so it will probably be a couple of weeks or so.
>>>> 
>>>> John.
>>>> 
>>>> 
>>> 
>>> 
>>> --
>>> 
>>> Tony Blews
>>> tonyblews at gmail.com         http://www.tonyblews.co.uk/
>>> Mob: +44(0)7832 237251    Twit: @tonyblews
>>