linux-kernel - Re: [PATCH] drm/nouveau/gem: tolerate a buffer specified multiple times

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Message-ID: <55BA9AF6.6060808@hurleysoftware.com>
Date:	Thu, 30 Jul 2015 17:45:26 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	Bryan O'Donoghue <pure.logic@...us-software.ie>,
	Timo Aaltonen <tjaalton@...ian.org>
CC:	Emil Velikov <emil.l.velikov@...il.com>,
	Ilia Mirkin <imirkin@...m.mit.edu>,
	Maarten Lankhorst <maarten.lankhorst@...onical.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	Ben Skeggs <bskeggs@...hat.com>
Subject: Re: [PATCH] drm/nouveau/gem: tolerate a buffer specified multiple
 times

[ +cc Debian maintainer ]

On 07/30/2015 11:26 AM, Emil Velikov wrote:
> On 30 July 2015 at 16:02, Ilia Mirkin <imirkin@...m.mit.edu> wrote:
>> On Thu, Jul 30, 2015 at 10:56 AM, Bryan O'Donoghue
>> <pure.logic@...us-software.ie> wrote:
>>> On 30/07/15 15:52, Bryan O'Donoghue wrote:
>>>>
>>>> On 30/07/15 15:49, Peter Hurley wrote:
>>>>>
>>>>> On 07/30/2015 10:12 AM, Ilia Mirkin wrote:
>>>>>>
>>>>>> Is this happening with libdrm 2.4.60? If so, that's a known
>>>>>> (user-side) issue and should be fixed by using any version but that
>>>>>> one.
>>>>>
>>>>>
>>>>> What's the freedesktop bugzilla # for reference?
>>>>>
>>>>> Regards,
>>>>> Peter Hurley
>>>>
>>>>
>>>> I believe it's this one
>>>>
>>>> https://bugs.freedesktop.org/show_bug.cgi?id=89842#c19
>>>>
>>>
>>> Not really a world of choice on ubuntu to fix it though...
>>>
>>> deckard@...eko:~/Development/projectara$ apt-show-versions libdrm2
>>> libdrm2:amd64/trusty-updates 2.4.60-2~ubuntu14.04.1 uptodate
>>> libdrm2:i386/trusty-updates 2.4.60-2~ubuntu14.04.1 uptodate
>>>
>>> :(
>>
>> That's unfortunate. I know next to nothing about debian/ubuntu or how
>> they do versions or how to even build packages for them. But they're
>> big distros, presumably they have support teams of some sort, perhaps
>> they can help you.
>>
>> Assuming that switching away does resolve the issue for you, perhaps
>> you can also recommend that they avoid shipping that version, or
>> include this nouveau fix in it:
>>
>> http://cgit.freedesktop.org/mesa/drm/commit/?id=812e8fe6ce46d733c30207ee26c788c61f546294
>>
> Fwiw debian has been tracking this as #789759, and they are shipping
> 2.4.62 which includes the fix.

Unfortunately the LTS version of Ubuntu (trusty) was updated to 2.4.60
several days ago without this fix.

I repackaged libdrm 2.4.60 with only the bug fix above and confirm the
patch above fixes the observed behavior in freedesktop bug# 89842/
debian bug# 789759.

I pushed the repackage to Launchpad PPA @ ppa:phurley/libdrm

Hopefully the Debian maintainer grabs this fix and updates the official
distribution version soon.

Regards,
Peter Hurley
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