linux-kernel - Re: [PATCH v3 3/6] mm/vmscan: activate swap-backed executable folios after first usage

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Message-ID: <5a108252-4eb8-e353-da3d-a96b8799fadf@huawei.com>
Date:   Tue, 26 Apr 2022 14:58:26 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     "ying.huang@...el.com" <ying.huang@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     <iamjoonsoo.kim@....com>, <hch@....de>, <osalvador@...e.de>,
        <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 3/6] mm/vmscan: activate swap-backed executable folios
 after first usage

On 2022/4/26 10:02, ying.huang@...el.com wrote:
> On Mon, 2022-04-25 at 14:07 -0700, Andrew Morton wrote:
>> On Mon, 25 Apr 2022 19:12:29 +0800 Miaohe Lin <linmiaohe@...wei.com> wrote:
>>
>>> We should activate swap-backed executable folios (e.g. tmpfs) after first
>>> usage so that executable code gets yet better chance to stay in memory.
>>
>> Does this not erase the intended effect of Joonsoo's b518154e59a
>> ("mm/vmscan: protect the workingset on anonymous LRU")?
> 
> I don't think so.  This is only for executable folios (vm_flags &
> VM_EXEC).  The behavior for all other anonymous pages are not affected.
> 

Agree. Only executable folios are changed! Thanks both!

> Best Regards,
> Huang, Ying
> 
> .
>