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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id y6-20020a17090322c600b001bc5dc0cd75sm3904512plg.180.2023.09.15.14.23.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Sep 2023 14:23:04 -0700 (PDT) Date: Fri, 15 Sep 2023 14:23:03 -0700 From: Kees Cook To: Matteo Rizzo Cc: cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, vbabka@suse.cz, roman.gushchin@linux.dev, 42.hyeyoo@gmail.com, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-hardening@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, corbet@lwn.net, luto@kernel.org, peterz@infradead.org, jannh@google.com, evn@google.com, poprdi@google.com, jordyzomer@google.com Subject: Re: [RFC PATCH 12/14] mm/slub: introduce the deallocated_pages sysfs attribute Message-ID: <202309151422.C3F39B8D8E@keescook> References: <20230915105933.495735-1-matteorizzo@google.com> <20230915105933.495735-13-matteorizzo@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230915105933.495735-13-matteorizzo@google.com> X-Rspamd-Queue-Id: CEEAE1C0013 X-Rspam-User: X-Stat-Signature: bu8151i8pmboicbre5ind79gway94pac X-Rspamd-Server: rspam03 X-HE-Tag: 1694812985-397460 X-HE-Meta: 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 chqU4p9X 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 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: On Fri, Sep 15, 2023 at 10:59:31AM +0000, Matteo Rizzo wrote: > From: Jann Horn > > When SLAB_VIRTUAL is enabled this new sysfs attribute tracks the number > of slab pages whose physical memory has been reclaimed but whose virtual > memory is still allocated to a kmem_cache. > > Signed-off-by: Jann Horn Yay stats. :) Reviewed-by: Kees Cook -- Kees Cook