linux-kernel - Re: [HELP] How to get task

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Message-ID: <aa26006e-eec7-73f1-e111-6e2c2090d244@linux.alibaba.com>
Date:   Thu, 30 May 2019 15:26:44 +0800
From:   Yang Shi <yang.shi@...ux.alibaba.com>
To:     Mel Gorman <mgorman@...hsingularity.net>,
        Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     "linux-mm@...ck.org" <linux-mm@...ck.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [HELP] How to get task_struct from mm



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
>