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

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Date:   Tue, 26 Apr 2022 10:02:17 +0800
From:   "ying.huang@...el.com" <ying.huang@...el.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Miaohe Lin <linmiaohe@...wei.com>
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 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.

Best Regards,
Huang, Ying