linux-kernel - Re: [PATCH v2] mm/hugetlb: fix DEBUG_LOCKS_WARN_ON(1) when dissolve_free_hugetlb

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Message-ID: <Zie86XQGN91OcXHj@localhost.localdomain>
Date: Tue, 23 Apr 2024 15:51:37 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Miaohe Lin <linmiaohe@...wei.com>
Cc: akpm@...ux-foundation.org, muchun.song@...ux.dev,
	mike.kravetz@...cle.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mm/hugetlb: fix DEBUG_LOCKS_WARN_ON(1) when
 dissolve_free_hugetlb_folio()

On Fri, Apr 19, 2024 at 04:58:19PM +0800, Miaohe Lin wrote:
> When I did memory failure tests recently, below warning occurs:
> 
..
> 
> Fix this issue by checking whether folio is hugetlb directly instead
> of checking clear_flag to close the race window.
> 
> Fixes: 32c877191e02 ("hugetlb: do not clear hugetlb dtor until allocating vmemmap")
> CC: stable@...r.kernel.org
> Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>

Reviewed-by: Oscar Salvador <osalvador@...e.de>


-- 
Oscar Salvador
SUSE Labs