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From: Shakeel Butt To: Suren Baghdasaryan Cc: akpm@linux-foundation.org, kent.overstreet@linux.dev, vbabka@suse.cz, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, usamaarif642@gmail.com, 00107082@163.com, pasha.tatashin@soleen.com, souravpanda@google.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/3] alloc_tag: prevent enabling memory profiling if it was shut down Message-ID: References: <20250909233409.1013367-1-surenb@google.com> <20250909233409.1013367-3-surenb@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250909233409.1013367-3-surenb@google.com> X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: 5BF1840006 X-Rspamd-Server: rspam05 X-Stat-Signature: 8gghncoxqdrq1g9eus8u87jhjbh7nngk X-Rspam-User: X-HE-Tag: 1757482345-244471 X-HE-Meta: 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 thjmyWlF hVzlSnokHyzpqGG1HFFh57Zzue1oj/lIdGKh2mKea0Y8W2yUCUWHWF7amDgh9iZnP8uHXtDFSrF8xt/mqKnig3vbsXWaaMPJ29hSGw/6s6ZeKIO8Ssa3PXwLIzUhF/BPjbW2su9YZRf0GPOAKhYIrdnZWmEs+H0as1NF1llvnAFyMlM/p0v2tKbajdEtSs7DiVbLhYySQRcELGppf7PAignFoCI0Kf5Fqg4e9laD4hxl2WkbFhk1p8GbxBofyG9SSQvyEn2MR6NqsvYSRXZjlHtjZmoJ1lcdfQT8i5/6yqO1+OY99yasXzhWlzQ== 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 Tue, Sep 09, 2025 at 04:34:08PM -0700, Suren Baghdasaryan wrote: > Memory profiling can be shut down due to reasons like a failure during > initialization. When this happens, the user should not be able to > re-enable it. Current sysctrl interface does not handle this properly > and will allow re-enabling memory profiling. Fix this by checking for > this condition during sysctrl write operation. > > Signed-off-by: Suren Baghdasaryan Acked-by: Shakeel Butt