linux-kernel - Re: [PATCH v2] mm/slub: Avoid list corruption when removing a slab from the full list

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Message-ID: <006695cb-368c-9afc-80b5-29338e85ab99@gentwo.org>
Date: Mon, 7 Oct 2024 09:40:39 -0700 (PDT)
From: "Christoph Lameter (Ampere)" <cl@...two.org>
To: Hyeonggon Yoo <42.hyeyoo@...il.com>
cc: Vlastimil Babka <vbabka@...e.cz>, "yuan.gao" <yuan.gao@...oud.cn>, 
    penberg@...nel.org, rientjes@...gle.com, iamjoonsoo.kim@....com, 
    akpm@...ux-foundation.org, roman.gushchin@...ux.dev, linux-mm@...ck.org, 
    linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mm/slub: Avoid list corruption when removing a slab
 from the full list


list_del() in remove_partial() sets poison values for next/prev so there
should no list
corruption but a failure showing the poison values.

static inline void list_del(struct list_head *entry)
{
        __list_del_entry(entry);
        entry->next = LIST_POISON1;
        entry->prev = LIST_POISON2;
}