linux-kernel - Re: [PATCH v2] mm/hugetlb: fix a deadlock with pagecache_folio and hugetlb_fault_mutex

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Message-ID: <aC4tFWSclf40KJ_J@localhost.localdomain>
Date: Wed, 21 May 2025 21:44:21 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Hugh Dickins <hughd@...gle.com>
Cc: Gavin Guo <gavinguo@...lia.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, muchun.song@...ux.dev,
	akpm@...ux-foundation.org, kernel-dev@...lia.com,
	stable@...r.kernel.org, Florent Revest <revest@...gle.com>,
	Gavin Shan <gshan@...hat.com>
Subject: Re: [PATCH v2] mm/hugetlb: fix a deadlock with pagecache_folio and
 hugetlb_fault_mutex_table

On Wed, May 21, 2025 at 08:58:32AM -0700, Hugh Dickins wrote:
> If we unlocked it, anyone else could have taken it immediately after.

Sorry Hugh, I was being dumb, of course you are right.

Then, maybe v1 was not really a bad idea, but we might need to think of
a better idea overall.

-- 
Oscar Salvador
SUSE Labs