lkml.org 
[lkml]   [2018]   [Jan]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC] Per file OOM badness
From
Date
On 2018-01-24 12:50 PM, Michal Hocko wrote:
> On Wed 24-01-18 12:23:10, Michel Dänzer wrote:
>> On 2018-01-24 12:01 PM, Michal Hocko wrote:
>>> On Wed 24-01-18 11:27:15, Michel Dänzer wrote:
> [...]
>>>> 2. If the OOM killer kills a process which is sharing BOs with another
>>>> process, this should result in the other process dropping its references
>>>> to the BOs as well, at which point the memory is released.
>>>
>>> OK. How exactly are those BOs mapped to the userspace?
>>
>> I'm not sure what you're asking. Userspace mostly uses a GEM handle to
>> refer to a BO. There can also be userspace CPU mappings of the BO's
>> memory, but userspace doesn't need CPU mappings for all BOs and only
>> creates them as needed.
>
> OK, I guess you have to bear with me some more. This whole stack is a
> complete uknonwn. I am mostly after finding a boundary where you can
> charge the allocated memory to the process so that the oom killer can
> consider it. Is there anything like that? Except for the proposed file
> handle hack?

How about the other way around: what APIs can we use to charge /
"uncharge" memory to a process? If we have those, we can experiment with
different places to call them.


--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer

\
 
 \ /
  Last update: 2018-01-30 10:30    [W:0.095 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site