linux-kernel - Re: [PATCH v2 3/9] mm/vmscan: introduce helper function reclaim_page

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Message-ID: <b9578dbf-f393-6eed-789a-267da296a413@huawei.com>
Date:   Mon, 11 Apr 2022 11:26:38 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     Matthew Wilcox <willy@...radead.org>
CC:     <akpm@...ux-foundation.org>, <ying.huang@...el.com>,
        <songmuchun@...edance.com>, <hch@...radead.org>,
        <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 3/9] mm/vmscan: introduce helper function
 reclaim_page_list()

On 2022/4/11 11:17, Matthew Wilcox wrote:
> On Mon, Apr 11, 2022 at 09:53:15AM +0800, Miaohe Lin wrote:
>> On 2022/4/9 21:44, Matthew Wilcox wrote:
>>> On Sat, Apr 09, 2022 at 05:34:54PM +0800, Miaohe Lin wrote:
>>>> +	nr_reclaimed = shrink_page_list(page_list, pgdat, &sc, &dummy_stat, false);
>>>> +	while (!list_empty(page_list)) {
>>>> +		folio = lru_to_folio(page_list);
>>>> +		list_del(&folio->lru);
>>>> +		putback_lru_page(&folio->page);
>>>
>>> folio_putback_lru()
>>
>> I thought folio_putback_lru is deliberately not to use because there is no caller of folio_putback_lru now.
>> But it seems I was wrong. Will do it in next version.
> 
> Looks like all of the uses of it that I mooted during the last merge
> window ended up going away.
> 
> https://lore.kernel.org/all/20220204195852.1751729-47-willy@infradead.org/
> was obsoleted by commit b109b87050df
> 
> https://lore.kernel.org/all/20220204195852.1751729-48-willy@infradead.org/
> and
> https://lore.kernel.org/all/20220204195852.1751729-50-willy@infradead.org/
> were also obsoleted by Hugh's mlock changes
> 
> I also sent
> https://lore.kernel.org/all/YjJJIrENYb1qFHzl@casper.infradead.org/
> 
> but never quite got it up to submittable quality.

I see. This is really a pity. Many thanks for clarifying. :)

> 
> .
>