Received-SPF: softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19;
Message-ID: <be4253d45d473f56aa54f69f46978cc15c3bb1cb.camel@intel.com>
Subject: Re: [PATCH v2 5/9] mm/vmscan: activate swap-backed executable
 folios after first usage
From:   "ying.huang@intel.com" <ying.huang@intel.com>
To:     Miaohe Lin <linmiaohe@huawei.com>, akpm@linux-foundation.org
Cc:     songmuchun@bytedance.com, hch@infradead.org, willy@infradead.org,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org
Date:   Tue, 12 Apr 2022 08:59:17 +0800
In-Reply-To: <20220409093500.10329-6-linmiaohe@huawei.com>
References: <20220409093500.10329-1-linmiaohe@huawei.com>
         <20220409093500.10329-6-linmiaohe@huawei.com>
Content-Type: text/plain; charset="UTF-8"
User-Agent: Evolution 3.38.3-1 
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

On Sat, 2022-04-09 at 17:34 +0800, Miaohe Lin 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.
> 
> Suggested-by: Huang, Ying <ying.huang@intel.com>
> Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>

Reviewed-by: Huang, Ying <ying.huang@intel.com>

Best Regards,
Huang, Ying

> ---
>  mm/vmscan.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/mm/vmscan.c b/mm/vmscan.c
> index 0e5818970998..cc1193e320c2 100644
> --- a/mm/vmscan.c
> +++ b/mm/vmscan.c
> @@ -1412,9 +1412,9 @@ static enum page_references folio_check_references(struct folio *folio,
>  			return PAGEREF_ACTIVATE;
>  
> 
> 
> 
>  		/*
> -		 * Activate file-backed executable folios after first usage.
> +		 * Activate executable folios after first usage.
>  		 */
> -		if ((vm_flags & VM_EXEC) && !folio_test_swapbacked(folio))
> +		if (vm_flags & VM_EXEC)
>  			return PAGEREF_ACTIVATE;
>  
> 
> 
> 
>  		return PAGEREF_KEEP;