linux-kernel - Re: [PATCH] mm: memory-failure: remove unneeded page state check in shake

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Message-ID: <8f8f7622-9bea-c344-4e54-ef902129de67@huawei.com>
Date:   Mon, 26 Jun 2023 09:40:48 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     Matthew Wilcox <willy@...radead.org>
CC:     <akpm@...ux-foundation.org>, <naoya.horiguchi@....com>,
        <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm: memory-failure: remove unneeded page state check in
 shake_page()

On 2023/6/26 3:50, Matthew Wilcox wrote:
> On Sun, Jun 25, 2023 at 07:34:30PM +0800, Miaohe Lin wrote:
>> Remove unneeded PageLRU(p) and is_free_buddy_page(p) check as slab caches
>> are not shrunk now. This check can be added back when a lightweight range
>> based shrinker is available.
> 
> On further review, I think you've misunderstood the entire situation
> here and no patch should be applied.

Thanks for your review. I think you might misunderstood the patch. What I want
to do here is remove the unneeded if block:

 if (PageLRU(p) || is_free_buddy_page(p))
     return;

Because nothing is done after the check. So this check is useless and should be removed.
Thanks.