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

["Bryan O'Donoghue" <pure.logic@nexus-software.ie>]

On 31/07/15 10:53, Bryan O'Donoghue wrote:
> On 31/07/15 01:03, Bryan O'Donoghue wrote:
>> On 30/07/15 22:45, Peter Hurley wrote:
>>> [ +cc Debian maintainer ]
>>>
>>> On 07/30/2015 11:26 AM, Emil Velikov wrote:
>>>> On 30 July 2015 at 16:02, Ilia Mirkin <imirkin@alum.mit.edu> wrote:
>>>>> On Thu, Jul 30, 2015 at 10:56 AM, Bryan O'Donoghue
>>>>> <pure.logic@nexus-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@aineko:~/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
>>
>> Yep.
>>
>> Dropping down to 2.4.56-1~ubuntu2 definitely removes the
>>
>> nouveau E[chrome[2737]] multiple instances of buffer 33 on validation
>> list
>> nouveau E[chrome[2737]] validate_init
>> nouveau E[chrome[2737]] validate: -22
>> nouveau E[chrome[2737]] multiple instances of buffer 18 on validation
>> list
>> nouveau E[chrome[2737]] validate_init
>>   nouveau E[chrome[2737]] validate: -22
>> nouveau E[   PFIFO][0000:01:00.0] PFIFO: read fault at
>> 0x0003e21000 [PAGE_NOT_PRESENT] from (unknown enum
>> 0x00000000)/GPC0/(unknown enum 0x0000000f) on channel 0x007f80c000
>> [unknown]
>>
>> and hard lock-up of X. I'll update these guys with the fix
>>
>> http://tinyurl.com/orvbzf3
>
> Hmm.
>
> Interesting - I spoke way too soon on that.
>
> Left my machine up overnight and lo and behold now that I do a dmesg I
> see...
>
> nouveau E[chrome[2870]] multiple instances of buffer 16 on validation list
> nouveau E[chrome[2870]] multiple instances of buffer 24 on validation list
> nouveau E[chrome[2870]] multiple instances of buffer 167 on validation list
> nouveau E[chrome[2870]] multiple instances of buffer 251 on validation list
> nouveau E[chrome[2870]] multiple instances of buffer 248 on validation list
> nouveau E[chrome[2870]] multiple instances of buffer 249 on validation list
> nouveau E[chrome[2870]] multiple instances of buffer 230 on validation list
> nouveau E[chrome[2870]] multiple instances of buffer 253 on validation list
> nouveau E[chrome[2870]] multiple instances of buffer 255 on validation list
> nouveau E[chrome[2870]] multiple instances of buffer 230 on validation list
> nouveau E[chrome[2870]] multiple instances of buffer 257 on validation list
> nouveau E[chrome[2870]] multiple instances of buffer 230 on validation list
>
> deckard@aineko:~$ dpkg -s libdrm2
> Package: libdrm2
> Status: install ok installed
> Priority: optional
> Section: libs
> Installed-Size: 106
> Maintainer: Ubuntu X-SWAT <ubuntu-x@lists.ubuntu.com>
> Architecture: amd64
> Multi-Arch: same
> Source: libdrm
> Version: 2.4.56-1~ubuntu2
> Depends: libc6 (>= 2.17)
> Pre-Depends: multiarch-support
> Description: Userspace interface to kernel DRM services -- runtime
>   This library implements the userspace interface to the kernel DRM
>   services.  DRM stands for "Direct Rendering Manager", which is the
>   kernelspace portion of the "Direct Rendering Infrastructure" (DRI).
>   The DRI is currently used on Linux to provide hardware-accelerated
>   OpenGL drivers.
>   .
>   This package provides the runtime environment for libdrm.
> Orig-Maintainer: Debian X Strike Force <debian-x@lists.debian.org>
>
> deckard@aineko:~$ uname -a
> Linux aineko 4.2.0-rc4+ #50 SMP Thu Jul 30 01:22:01 IST 2015 x86_64
> x86_64 x86_64 GNU/Linux
>
> Please note - this machine has the fix I proposed in the original patch
> applied so X is not locking up when the multiple instances message happens.
>
> In any case to answer the original question - I don't believe switching
> away from 2.4.60 will resolve this issue

2.40.6 I mean :)