Re: [HELP] How to get task_struct from mm

From: Yang Shi
Date: Thu May 30 2019 - 03:30:24 EST




On 5/30/19 2:57 PM, Yang Shi wrote:
Hi folks,


As what we discussed about page demotion for PMEM at LSF/MM, the demotion should respect to the mempolicy and allowed mems of the process which the page (anonymous page only for now) belongs to.


The vma that the page is mapped to can be retrieved from rmap walk easily, but we need know the task_struct that the vma belongs to. It looks there is not such API, and container_of seems not work with pointer member.


Any suggestion?

mm->owner is defined for CONFIG_MEMCG only, I'm wondering whether we can extend this to !CONFIG_MEMCG case or not?



Thanks,

Yang