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

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

On 31/07/15 10:58, Bryan O'Donoghue wrote:
> 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 :)
>

ah no... 2.4.60 is right...

Yes so Ilia - I've switched out 2.4.60 as per your suggestion to 2.4.56 
(getting the version numbers right :) ) and it's still definitely giving 
me the multiple instances message.