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AHgh+RqhK0e3XkuauQTUQynH0MrFNvfZJCt3Jp6kHojBWB/xq0E6OM1ZCRyIdqmB+QpoNrDcIDFztg0wbxLYCOI=@vger.kernel.org X-Gm-Message-State: AOJu0YynFe+iqZxUzW4RYswGZvB+Z6nmhqjsrAJbpOXWJg6+XpO1P4gx M9F4VzdEw3Ixy3JGCRPtVnGpndsqksed1PpfA3xZSZBZLuLXiqIQUcJktHNIBx3ubvAo5c5D6we tcFg0UP0MDDvqmEXXLDDjn1gZjWJ+TtlJWUU1+/kD X-Gm-Gg: AR+sD104XVnVHoePjhkVB5uSRN6yqgyjjnFAzagv1b/FlzMUyMxKmxcE81O5HN41fgH pw8NpckERr7T4jRK/YV1fcAiDTHn4yqbGxYD0k6ShP2itvMltBgRGqTBIG6z/M1thASTcGQ5JUB 4A3hMnViFmyaYR3pBwnxOkLf733IJEJNj10YiprFa0C+YpEDVgnaDGk58HtfB3j52/0Xc2IMDJd 7jKgneJ8eNB0NSL7xK/zau6JZhcXKbiFeYVzSJIHXYfBdxR09az61/NJMmmi/HawZf9NxMXC7pI IQEaJ8AqHCy1hz88C01twstRInkptULOPmlwRXC3opaO3/UiVtt7XUs= X-Received: by 2002:a05:622a:98c:b0:51c:ad5:93be with SMTP id d75a77b69052e-52cd4df7d70mr2079611cf.8.1785784502537; Mon, 03 Aug 2026 12:15:02 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20260802215459.2769283-1-surenb@google.com> <20260802215459.2769283-5-surenb@google.com> In-Reply-To: From: Suren Baghdasaryan Date: Mon, 3 Aug 2026 12:14:50 -0700 X-Gm-Features: AUfX_mycQo4q9-oh_NeNxMl4F_bQ3PUY4_eZSLYeXtHNhrEF3IZz0lhXsltZXzE Message-ID: Subject: Re: [PATCH v3 4/5] binder: Remove mmap_lock fallback To: Alice Ryhl Cc: akpm@linux-foundation.org, 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" Content-Transfer-Encoding: quoted-printable On Mon, Aug 3, 2026 at 3:34=E2=80=AFAM Alice Ryhl wr= ote: > > On Sun, Aug 02, 2026 at 02:54:58PM -0700, Suren Baghdasaryan wrote: > > From: Dave Hansen > > > > Previously, the per-VMA locking could fail in the face of writers > > which necessitate a fallback to mmap_lock. The new > > vma_start_read_unlocked() will wait for writers instead of failing. > > > > Use the new helper. Wait for writers. Remove the fallback to mmap_lock. > > > > Signed-off-by: Dave Hansen > > Signed-off-by: Suren Baghdasaryan > > Reviewed-by: Alice Ryhl Thanks!