Re: [PATCH v2 02/10] Add Aarch64 SVE Linux headers

Ramana Radhakrishnan
2018-06-15T09:45:31Z

On 12/06/2018 21:29, Sergio Durigan Junior wrote:
> On Tuesday, June 12 2018, Alan Hayward wrote:
>
>>> On 12 Jun 2018, at 17:34, Sergio Durigan Junior <sergiodj@redhat.com> wrote:
>>>
>>> On Tuesday, June 12 2018, Simon Marchi wrote:
>>>
>>>> On 2018-06-12 10:37, Alan Hayward wrote:
>>>>> Sorry, I did miss this one (I think I sent my reply to the previous
>>>>> one more or less the same time you sent this).
>>>>>
>>>>> If I commit this, (I think) this is going to cause buildbot to break
>>>>> for the aarch64 builds.
>>>>> (Out of interest - I’ve heard people say they tested on buildbot. Are
>>>>> there some instructions for doing that? I can try it out.)
>>>>
>>>> Hmm you're right. Though maybe we can have additional
>>>> commands/configure options specific to the aarch64 builders? They
>>>> could download a kernel tarball, install the headers somewhere (that
>>>> doesn't take long, no need to build the kernel) and point to them.
>>>> Sergio, would that be possible/a good idea?
>>>
>>> I'm not sure. For starters, the Aarch64 builders have kinda been
>>> forgotten since Yao stopped contributing regularly to GDB (he is the
>>> maintainer of the machines behind the builders). So the very first
>>> thing we'd need to do is to put the builders in a good shape again
>>> (they're currently with 273 pending builds in the queue!). This is
>>> something that's been on my TODO list for a while now, and I was going
>>> to ask Alan (or anyone from ARM) if they're not interested in taking
>>> over the maintenance of these machines.
>>
>> Looking after the aarch64 boxes does sound like a job for an Arm person.
>> I guess it’ll be fairly important to get those queues cleared _before_
>> 8.2 is released. I can certainly take a look at the pending builds in
>> the next few weeks.
>
> Yeah, what I do in these cases is cancel all of the pending builds,
> i.e., start fresh.
>
> I'm glad you're interested in taking care of the machines. TBH, I was
> even considering disabling them for now, since at least one machine has
> been offline for a long time, and the other has this giant queue. I'm
> not sure if you're going to use the same machines as Yao was using
> (IIRC, he was using machines from the GCC Compile Farm).
>
>>> Then, I think the best approach for the SVE builds would be to manually
>>> download a Linux kernel, put the sources somewhere, and then I could
>>> configure a specific builder to build GDB with the SVE headers.
>>>
>>
>> Given the current queues, I suspect we’d not get this done before the 8.2
>> branch.
>
> I wouldn't count on that.
>
>> I’m thinking configure check of Pedro’s sounds the first step, then once
>> the aarch64 build queues have been cleared, get some sve builds added.
>>
>> The SVE headers are in Ubuntu 18.04 - so “allâ€ that’s needed is to do a
>> dist upgrade on them (I suspect there are probably lots of reasons why
>> that can’t be done!)
>
> Yeah, I honestly don't know :-/. If you're planning to continue using
> the GCC Farm machine, then I think the best option would be to contact
> the admins and ask them.
>

So I arranged for those machines in the compile farm and I believe I
have super user privileges on them. Updating to 18.04 may be an option
but something I don't want to do remotely and in a rush.

Alan, please reach out to me if you need any help on the compile farm
machines, I can help out.

Ramana

> Feel free to contact me in private if you need help sorting this out.
>
> Cheers,
>