[RFC] Per file OOM badness

[roger]

On 2018年01月19日 16:25, Michal Hocko wrote:
> [removed the broken quoting - please try to use an email client which
> doesn't mess up the qouted text]
>
> On Fri 19-01-18 06:01:26, He, Roger wrote:
> [...]
>> I think you are misunderstanding here.
>> Actually for now, the memory in TTM Pools already has mm_shrink which is implemented in ttm_pool_mm_shrink_init.
>> And here the memory we want to make it contribute to OOM badness is not in TTM Pools.
>> Because when TTM buffer allocation success, the memory already is removed from TTM Pools.
>
>     I have no idea what TTM buffers are. But this smells like something
>     rather specific to the particular subsytem. And my main objection here
>     is that struct file is not a proper vehicle to carry such an
>     information. So whatever the TTM subsystem does it should contribute to
>     generic counters rather than abuse fd because it happens to use it to
>     communicate with userspace.
>
    got it. thanks.
>

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