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b=HPerxWTj/wR/yz9KqR7BZ/IE74mbMjRVdfVb/Na/vo3crjk7v7RkPkkYTA7oAGN7l 5EKfl+gdyapyQpbNfITb611pxx3ENjIBTmAcaN26elsvf00r97h8TwXf3qZhw7+B0A 4T8+W93k0iBaAhuqFPoslEDKCs3dt36Wsm1rQwFLRKBQ+y3XZ1qGbmUBuEqlhKSZFu U29dKQZ44cXhfda1viJ6wn/gnz9Gf59/RcUsVHEUCZFx0k/DwxPr3gqs4xVezR3mR8 o1NMhxcG45RFk+L8j94ly1pa9t9+uDj823pW4sqQjCJF8iFir+E5lvhr0zbwbWAFtC Ca/kv4P02wFtw== Date: Tue, 7 Jul 2026 08:23:57 +0100 From: Lorenzo Stoakes To: Andrew Morton Cc: Mike Rapoport , "David Hildenbrand (Arm)" , Linus Torvalds , Alexander Viro , Christian Brauner , Jan Kara , Oleg Nesterov , Peter Xu , vova tokarev , linux-kernel@vger.kernel.org, linux-mm@kvack.org, stable@vger.kernel.org Subject: Re: [PATCH] userfaultfd: prevent registration of special VMAs Message-ID: References: <41ef0dce-e973-4947-b5e3-150fdb07f1a6@kernel.org> <11bae87d-73e6-4946-a41f-c5542fb40b75@kernel.org> <20260705005124.307e2379ab03109e5f77bd1c@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260705005124.307e2379ab03109e5f77bd1c@linux-foundation.org> X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: CD5CE20008 X-Stat-Signature: b9tawksmzdygghfr9b5f85w6pq1d3yed X-HE-Tag: 1783409049-454573 X-HE-Meta: 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 iioCSOX6 Q+A+kwuawvjiK/U+0jB7JWde+Xgq1BEjjGDiacE1iQZigtqItJFrJtBjLdlKP8Zki4DGdwg2v51A8iWhpU99G2HAC2ITioWBym0p/9sC7GNyNWnsUEuNEqt0/uVfOrXdEXjpJbqafU5dXCEi+E0k5jKRdMUAYpgjeONsy0rK6lk8pTHztdLApjL06WuSQJqUoH9C8ZanbOW1F1TY5Dm1xaOjdbx2C4NAuQtm7DxGDOpx2ZxRSBrYX4wz1HJjBnEsgshvwPawe0NFwxbFUqjQX1TJGJw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sun, Jul 05, 2026 at 12:51:24AM -0700, Andrew Morton wrote: > On Fri, 3 Jul 2026 14:38:56 +0100 Lorenzo Stoakes wrote: > > > On Fri, Jul 03, 2026 at 04:20:37PM +0300, Mike Rapoport wrote: > > > On Fri, Jul 03, 2026 at 11:11:14AM +0100, Lorenzo Stoakes wrote: > > > > On Thu, Jun 18, 2026 at 11:37:10AM +0200, David Hildenbrand (Arm) wrote: > > > > > > In a way that's an extra check for hugetlb, but it will work. > > > > > > > > > > My point would be that we exclude all special VMAs, except hugetlb (which is > > > > > special but supported ... in its special way). > > > > > > > > Mike - you said you were respinning, it'd help my series if you respan the above > > > > quickly so I could base my change on that :). > > > > > > I sent it already: > > > > > > https://lore.kernel.org/all/20260618095017.2553004-1-rppt@kernel.org > > > > > > and Andrew apparently ook it: > > > > > > https://lore.kernel.org/all/20260618183442.BBCD71F000E9@smtp.kernel.org > > > > It's not anywhere :) > > > > Andrew - did you take that thread as signal this should not go in? > > > > It should definitely go in. I will clean up the mess discussed there separately. > > Thanks, yes, I added it then hid it when Linus objected. I'll unhide > it now. Thanks!