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b=lw1aE0RlWxmrVX1SBFRJgy1UyPRTg4K6nP+DEjnY9dlEAsFMk2L2RNTreb0d+vs/k 1gYgzd2yzaN3XobC7uyRdh1AW0rjf0Olb3qRLd+W/Q1HYfJhedn8GiXr9Nt0CNftbb PL/NA8rFtyplykMr0XbJ7OZgExm1aHBfS+hm1Ecw= Date: Wed, 15 Jul 2026 14:17:37 -0700 From: Andrew Morton To: Stanislav Kinsburskii Cc: airlied@gmail.com, akhilesh@ee.iitb.ac.in, corbet@lwn.net, dakr@kernel.org, david@kernel.org, decui@microsoft.com, haiyangz@microsoft.com, jgg@ziepe.ca, kees@kernel.org, kys@microsoft.com, leon@kernel.org, liam@infradead.org, lizhi.hou@amd.com, ljs@kernel.org, longli@microsoft.com, lyude@redhat.com, maarten.lankhorst@linux.intel.com, mamin506@gmail.com, mhocko@suse.com, mripard@kernel.org, nouveau@lists.freedesktop.org, ogabbay@kernel.org, oleg@redhat.com, rppt@kernel.org, shuah@kernel.org, simona@ffwll.ch, skhan@linuxfoundation.org, surenb@google.com, tzimmermann@suse.de, vbabka@kernel.org, wei.liu@kernel.org, dri-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-rdma@vger.kernel.org Subject: Re: [PATCH v9 0/8] mm/hmm: Add mmap lock-drop support for userfaultfd-backed mappings Message-Id: <20260715141737.4097a5c7d74953ffd8ed66c9@linux-foundation.org> In-Reply-To: <178413903133.1155966.3904063656020521607.stgit@skinsburskii> References: <178413903133.1155966.3904063656020521607.stgit@skinsburskii> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 2739EC000A X-Stat-Signature: ddsitz8rj9ydc6yihpoaucngxjj1fxre X-HE-Tag: 1784150259-611760 X-HE-Meta: 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 gI8y0O36 MIGMvHl1P4gKRVwek9thiZtIRy3op+QZHxy6f6DP/K3SQywjCzn29jXu8PYjsdH2riCgt43FFZDq9ivB9q02SwVCpoFcyA0/D0KopdlfMGHXWPGMI/XV/6FI6afsqqYUDb1SUInzNS6ocUk/AzavRKfLpieM6IqIxuisAjHlXcvg6GDXdXwtTmWHpE5BaMuc2PxM9CObEpX6xh4pTLp+JNmmnvqioyfa1Q3USGVa35YQd2iS0Uol1ZZ45dbmmD01an7Mg1k++pdDXZHvYZMpbrqmejmPXH3niO7Ck8JTjUyRl0gk= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 15 Jul 2026 11:15:50 -0700 Stanislav Kinsburskii wrote: > This series extends the HMM framework to support userfaultfd-backed memory > by allowing the mmap read lock to be dropped during hmm_range_fault(). Thanks, updated. > Changes in v9: > > - Folded the fixups into the full 8-patch series instead of sending a > separate fixup series. > - Clarified that the HMM timeout bounds repeated HMM/mmu-notifier retry > attempts, with the helper refreshing range->notifier_seq internally. > - Kept nouveau’s explicit outer deadline because its retry loop runs in a GPU > fault worker and cannot rely on fatal signals from the faulting process. > - Converted amdxdna, and GPU SVM callers to pass the shole timeout budget to > hmm_range_fault_unlocked_timeout(). These are all in your fixups for v8, so the v9 series made no alteration to mm.git.