linux-kernel - Re: [PATCH] mm: check high-order page when free it to pcp

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Message-ID: <20220919104158.6vbzmzxk2dy6tu6w@techsingularity.net>
Date:   Mon, 19 Sep 2022 11:42:14 +0100
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     "zhaoyang.huang" <zhaoyang.huang@...soc.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Zhaoyang Huang <huangzhaoyang@...il.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, ke.wang@...soc.com
Subject: Re: [PATCH] mm: check high-order page when free it to pcp

On Mon, Sep 19, 2022 at 11:47:18AM +0800, zhaoyang.huang wrote:
> From: Zhaoyang Huang <zhaoyang.huang@...soc.com>
> 
> High-order pcp page escaped from checking when both of DEBUG_VM and debug_pagealloc
> are all disabled if it allocated again from pcp_list without going to global
> free list, which should be introduced by 44042b4498.
> 
> fix:44042b4498
> 
> Signed-off-by: Zhaoyang Huang <zhaoyang.huang@...soc.com>

Is this based on the comment mentioning order-0 pages above
free_pcp_prepare()? I ask because the comment is wrong and in both
instances should have s/order-0//

-- 
Mel Gorman
SUSE Labs