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AKwUvByecf/uMj8WnGCr1kKNNti/TEcuy3dkhsE+g0jdRLSaGBd2gPy/3zIheZYJbaauqaSQOocMVGs=@vger.kernel.org X-Gm-Message-State: AFuF++lSuEKl9Kl7it8vaD4qWNDYNHUo0jOAdDtd7T7Yxm6YiUPVpOzn wMWRg8C8okBGVbOqyPjGwlJGKNpCV4oiy7Ln+VsMRH0lq/lSsUJzz5EA+kHcWNZvmMQJ+XB5f8W Tph1M8iMPa6jbjsmSXQ== X-Received: from wrte3.prod.google.com ([2002:a5d:5003:0:b0:47f:6f9a:3629]) (user=aliceryhl job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6000:41de:b0:484:3315:1a37 with SMTP id ffacd0b85a97d-48436329b4dmr19698226f8f.27.1788174797557; Mon, 31 Aug 2026 04:13:17 -0700 (PDT) Date: Mon, 31 Aug 2026 11:13:16 +0000 In-Reply-To: <20260829185625.f5ee1b2931818843a78af88d@linux-foundation.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260813193433.3318288-1-surenb@google.com> <20260829185625.f5ee1b2931818843a78af88d@linux-foundation.org> Message-ID: Subject: Re: [PATCH v6 0/5] mm: Unconditional per-VMA locks and cleanups From: Alice Ryhl To: Andrew Morton Cc: Suren Baghdasaryan , dave.hansen@linux.intel.com, Liam.Howlett@oracle.com, ljs@kernel.org, david@redhat.com, willy@infradead.org, shakeel.butt@linux.dev, vbabka@kernel.org, jannh@google.com, arve@android.com, cmllamas@google.com, christian@brauner.io, tkjos@android.com, dsahern@kernel.org, davem@davemloft.net, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org Content-Type: text/plain; charset="utf-8" On Sat, Aug 29, 2026 at 06:56:25PM -0700, Andrew Morton wrote: > On Thu, 13 Aug 2026 12:34:28 -0700 Suren Baghdasaryan wrote: > > > v2 version of this patchset [1] was written by Dave Hansen and per his > > request, I'm taking over this series. > > > > tl;dr: Make per-VMA locks available in all configs. Simplify some > > of the per-VMA lock users now that they can rely on them being > > always available. > > It's been 2+ weeks so perhaps a refresh-and-remind would be helpful. > > But it applies well enough and is adequately reviewed so I put it in > there for testing, thanks. > > AI review might have found a couple of pre-existing binder bugs: > > https://sashiko.dev/#/patchset/20260813193433.3318288-1-surenb@google.com > > and a small rusty thing which you might wish to attend to. The binder bug is not actually a bug. When using VM_MIXEDMAP and vm_insert_page(), the vma takes a refcount on the page, so there is no use-after-free even if free_page() is invoked without removing it from the vma. Adding an INVARIANT: comment to the Rust code SGTM. Alice