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Wed, 21 May 2025 19:44:22 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id IyYqOBYtLmi9YgAAD6G6ig (envelope-from ); Wed, 21 May 2025 19:44:22 +0000 Date: Wed, 21 May 2025 21:44:21 +0200 From: Oscar Salvador To: Hugh Dickins Cc: Gavin Guo , linux-mm@kvack.org, linux-kernel@vger.kernel.org, muchun.song@linux.dev, akpm@linux-foundation.org, kernel-dev@igalia.com, stable@vger.kernel.org, Florent Revest , Gavin Shan Subject: Re: [PATCH v2] mm/hugetlb: fix a deadlock with pagecache_folio and hugetlb_fault_mutex_table Message-ID: References: <20250521115727.2202284-1-gavinguo@igalia.com> <30681817-6820-6b43-1f39-065c5f1b3596@google.com> <54bd3d6c-d763-ae09-6ee2-7ef192a97ca9@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <54bd3d6c-d763-ae09-6ee2-7ef192a97ca9@google.com> X-Rspamd-Action: no action X-Stat-Signature: ibdhf9p6odynh45y457qyhbe14n8rwqq X-Rspamd-Queue-Id: 22AF7180013 X-Rspam-User: X-Rspamd-Server: rspam02 X-HE-Tag: 1747856664-403149 X-HE-Meta: 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 8P3FD/99 5CxHTL3+OwlOQzO9fHod7Bgq6b7jt7W5Y1QwgSpCH7aeo0WM1vV6FJkxlyZK/XgYAMxFtQmuXrAIs1V+Ddv+FzEzIAOg1bJJJvXdLrcZSLp8knpeJ/4DLxiCRv/75OGHNrooTMc4mHvSRkZlY3YtLyCepQbXbMOyX3DO7qeexUrKuA+UPfiLhUHaP8xKvBk1aItq6jWGJs66wySQRo2ZvgsINTXhMaUO3KrjwOlcZCHyydpZec/ebyN2X3gGLNqR4sRRzO3cXRrng1KZoUwz97Nbl7xwkE8+p6rUlYOM3mUm7fU0emVLBoYYrW1F4+DXDAawD4tRSD9ACgAs= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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