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b=i8W5LaDVMdMeRKjuKIAp+oe+0aLo9cXzqnuGJ7Up5hGRVTQeTLxjAkNXp1M2uS1VX 84b12xeTyOofei9sMCqGEZU4OhRbo9fmchzbiqh3vGx6cxKUC0Lno+MCCZySBwh7XO FQzK+dBEPxlogpQauZpOHxHP/JTGROSvcME9Z+4Y= Date: Mon, 13 Jan 2025 20:09:08 -0800 From: Andrew Morton To: Suren Baghdasaryan Cc: Lorenzo Stoakes , peterz@infradead.org, willy@infradead.org, liam.howlett@oracle.com, david.laight.linux@gmail.com, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, mjguzik@gmail.com, oliver.sang@intel.com, mgorman@techsingularity.net, david@redhat.com, peterx@redhat.com, oleg@redhat.com, dave@stgolabs.net, paulmck@kernel.org, brauner@kernel.org, dhowells@redhat.com, hdanton@sina.com, hughd@google.com, lokeshgidra@google.com, minchan@google.com, jannh@google.com, shakeel.butt@linux.dev, souravpanda@google.com, pasha.tatashin@soleen.com, klarasmodin@gmail.com, richard.weiyang@gmail.com, corbet@lwn.net, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@android.com Subject: Re: [PATCH v9 00/17] reimplement per-vma lock as a refcount Message-Id: <20250113200908.d821636a39e9ca6130a90e24@linux-foundation.org> In-Reply-To: References: <20250111042604.3230628-1-surenb@google.com> <20250113174941.8c6d5defe18c8b1a7e477ace@linux-foundation.org> 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-Stat-Signature: a5trtse77bqumczshufiafkub7qfesbi X-Rspam-User: X-Rspamd-Queue-Id: 3B61F14000A X-Rspamd-Server: rspam08 X-HE-Tag: 1736827752-394130 X-HE-Meta: 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 eDmg/JGK 7jNEj42SrftfnsAMTm1lXAdI0p5hui0CksdOxLKr5x6olyh8w2jqExHoRtACLDWL+kgxSuiJ0+Ts7pxGJrdYsyJwH+XWyO+02sJyU3u2Pmt3vdZ6R5BFx7TWKwv7RxgHUdAaGGODfV/rimB5CP17kDPU8Fj14itAGDZgIj2qKNv1TTOqlTGa+oVCC2ldjzZ224LF/XIyzvy3ZffAG4yXTEnYEHiLQ+XsDSN6Gui9B9m0CuMmlM62vQE7u3Z12zp+2KX+KnA5uHrpfifXmKQtRDCdba6Rrtl+6DbkYPTTx2eQgdEj/iFQxngc1/ahPbXyjMw3wYezex25xa1e3NGGL84blKcLPQ2oaYa2LfXSmKRtIZXzPEPLex7+fco0JsjuGqOUEu+HuWMEoPjUqRLTa9ydJ+VKqc84A/1AuBE0GjCCrRtE= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 13 Jan 2025 18:53:11 -0800 Suren Baghdasaryan wrote: > On Mon, Jan 13, 2025 at 5:49 PM Andrew Morton wrote: > > > > > > Yes, we're at -rc7 and this series is rather in panic mode and it seems > > unnecessarily risky so I'm inclined to set it aside for this cycle. > > > > If the series is considered super desirable and if people are confident > > that we can address any remaining glitches during two months of -rc > > then sure, we could push the envelope a bit. But I don't believe this > > is the case so I'm thinking let's give ourselves another cycle to get > > this all sorted out? > > I didn't think this series was in panic mode with one real issue that > is not hard to address (memory ordering in > __refcount_inc_not_zero_limited()) but I'm obviously biased and might > be missing the big picture. In any case, if it makes people nervous I > have no objections to your plan. Well, I'm soliciting opinions here. What do others think? And do you see much urgency with these changes?