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b=Ho+IIuyKp++PHAd93qe2Qh5adf3DEktrUTRnMNB1chctnEdXqn558DpvM+sk4AJy1 mA8sxwiU2YMsoEEkzeuUsZyc4e0f0qn0tiKfk/4C1ZY0rwioNrLx7kBKg/VVYy++FY OHLyXTgyNPCqT4dRlKKFFi8MCosU1HawJ3m53WOYx5l+whGo/KLbhibYXTogL7aAuK 7EzGGoqGmCz9pYTvP47Z9PInEHNIqry/43q/5S8SZRE7WD9WwiM6mhAZdd1RwRBRSJ ecaba0edW3Zk+iO2uVPkLe8y5sQQinVinWu//hSYfccADVOzyBLxv1zHSduOX2wy0/ nMT0AvNlver0A== Date: Fri, 3 Jul 2026 14:38:56 +0100 From: Lorenzo Stoakes To: Mike Rapoport Cc: "David Hildenbrand (Arm)" , Andrew Morton , 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: <5a993689-f730-406d-8515-8bb6025cc851@kernel.org> <41ef0dce-e973-4947-b5e3-150fdb07f1a6@kernel.org> <11bae87d-73e6-4946-a41f-c5542fb40b75@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: AD17EA0004 X-Stat-Signature: 13ce679137centspox7wa5yji8ji6gxh X-HE-Tag: 1783085947-737589 X-HE-Meta: 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 sQ+0p2P8 8Rz+kdpsWiZG8r8n6bLicy0MFollqXIGtqaDyrJGNTrpeoHYique4hu4ozbx2uGCm7aTM2gAOGTtsMUrdYwkePuudZM315TPGOQ995HPLRwLIpdmM/p3HQth/8PGeWf+S20XREbMRskSBBr6lEnQYUaVbTuJTzZmuQgVMnW7JcRrQO+j7dkHTiZ6ImUJJsVAE/B/PUG1iR5Ov5B/7eXX4n6BT/28E050t+sgL5U8PHNgSm9IpdeCtip6V/FX0vfYewLwd/8mTYbUtL1qygoUgLpIn6w== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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. > > > I can send a quick patch if you're tied up also! > > > > Thanks, Lorenzo > > -- > Sincerely yours, > Mike. Thanks, Lorenzo