linux-kernel - Re: [RFC PATCH V1 0/3] mm/damon: Add CMA minotor support

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Message-ID: <6e6ef9fa-3916-3449-954d-efd63a959019@linux.alibaba.com>
Date:   Thu, 17 Mar 2022 15:03:11 +0800
From:   Xin Hao <xhao@...ux.alibaba.com>
To:     David Hildenbrand <david@...hat.com>, sj@...nel.org
Cc:     rongwei.wang@...ux.alibaba.com, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Baolin Wang <baolin.wang@...ux.alibaba.com>
Subject: Re: [RFC PATCH V1 0/3] mm/damon: Add CMA minotor support

Hi David,

On 3/16/22 11:09 PM, David Hildenbrand wrote:
> On 15.03.22 17:37, Xin Hao wrote:
>
> s/minotor/monitor/
Thanks,  i will fix it.
>
>> The purpose of these patches is to add CMA memory monitoring function.
>> In some memory tight scenarios, it will be a good choice to release more
>> memory by monitoring the CMA memory.
> I'm sorry, but it's hard to figure out what the target use case should
> be. Who will release CMA memory and how? Who will monitor that? What are
> the "some memory tight scenarios"? What's the overall design goal?
I may not be describing exactly what  i mean，My intention is to find out 
how much of the reserved CMA space is actually used and which is unused,
For those that are not used, I understand that they can be released by 
cma_release(). Of course, This is just a little personal thought that I 
think is helpful for saving memory.
>
-- 
Best Regards!
Xin Hao