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[98.225.44.182]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84214b67a11sm1946082b3a.27.2026.05.29.07.41.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 May 2026 07:41:14 -0700 (PDT) Date: Fri, 29 May 2026 07:41:12 -0700 From: Stanislav Kinsburskii To: Andrew Morton Cc: Liam.Howlett@oracle.com, david@kernel.org, jgg@ziepe.ca, corbet@lwn.net, leon@kernel.org, ljs@kernel.org, mhocko@suse.com, rppt@kernel.org, shuah@kernel.org, skhan@linuxfoundation.org, surenb@google.com, vbabka@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v3 0/3] mm/hmm: Add mmap lock-drop support for userfaultfd-backed mappings Message-ID: References: <177928604779.589431.14703161356676674288.stgit@skinsburskii> <20260521163309.c5cc5d3f6cf16bac212cf90b@linux-foundation.org> <20260528131115.184c178d03d516e11248a1ae@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260528131115.184c178d03d516e11248a1ae@linux-foundation.org> X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: BA29120004 X-Stat-Signature: 1o3yc5h6mc68dc8afbpmgx1t13esugkj X-HE-Tag: 1780065676-76938 X-HE-Meta: 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 Z5cCa18r 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, May 28, 2026 at 01:11:15PM -0700, Andrew Morton wrote: > On Thu, 28 May 2026 12:53:59 -0700 Stanislav Kinsburskii wrote: > > > A gentle reminder as requested: do you think this change could be taken into > > the mm tree? > > It's beneficial not only for the MSHV driver, but can be used for > > post-copy live migration of GPU states in future. > > Still no review, alas. It's not a trivial thing, affecting both hmm > and userfaultfd. And we're closing in on -rc6. > > I'd prefer that we revisit in the next cycle, please. Refresh retest > and resend after -rc1? > Sure, will do. Thanks, Stanislav