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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com Subject: Re: [PATCH] mm: kmemleak: add CONFIG_DEBUG_KMEMLEAK_VERBOSE build option Date: Mon, 23 Mar 2026 17:49:22 -0700 Message-ID: <20260324004923.87190-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260323-kmemleak_report-v1-1-ba2cdd9c11b9@debian.org> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: 96k66jeromcyw85ituwnazshko1fsbgn X-Rspamd-Queue-Id: 8CF38A0002 X-Rspamd-Server: rspam09 X-HE-Tag: 1774313371-578756 X-HE-Meta: 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 7TTSz1hS nDOdi6lXyYkvG/5I= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 23 Mar 2026 04:12:13 -0700 Breno Leitao wrote: > Add a Kconfig option to default kmemleak verbose mode on at build time. > This option depends on DEBUG_KMEMLEAK_AUTO_SCAN since verbose reporting > is only meaningful when the automatic scanning thread is running. > > When enabled, kmemleak prints full details (backtrace, hex dump, address) > of unreferenced objects to dmesg as they are detected during scanning, > removing the need to manually read /sys/kernel/debug/kmemleak. > > Making this a compile-time option rather than a boot parameter allows > debug kernel flavors to enable verbose kmemleak reporting by default > without requiring changes to boot arguments. A machine can simply swap > to a debug kernel and benefit from kmemleak reporting automatically. > > By surfacing leak reports directly in dmesg, they are automatically > forwarded through any kernel logging infrastructure and can be easily > captured by log aggregation tooling, making it practical to monitor > memory leaks across large fleets. > > The verbose setting can still be toggled at runtime via > /sys/module/kmemleak/parameters/verbose. > > Signed-off-by: Breno Leitao Acked-by: SeongJae Park Thanks, SJ [...]