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[24.9.64.241]) by smtp.gmail.com with ESMTPSA id x14sm1533054ior.7.2020.11.11.08.03.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 11 Nov 2020 08:03:22 -0800 (PST) Subject: Re: [PATCH 00/13] Introduce seqnum_ops To: Matthew Wilcox Cc: corbet@lwn.net, keescook@chromium.org, gregkh@linuxfoundation.org, peterz@infradead.org, rafael@kernel.org, lenb@kernel.org, james.morse@arm.com, tony.luck@intel.com, bp@alien8.de, minyard@acm.org, arnd@arndb.de, mchehab@kernel.org, rric@kernel.org, valentina.manea.m@gmail.com, shuah@kernel.org, zohar@linux.ibm.com, dmitry.kasatkin@gmail.com, jmorris@namei.org, serge@hallyn.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-acpi@vger.kernel.org, openipmi-developer@lists.sourceforge.net, linux-edac@vger.kernel.org, linux-usb@vger.kernel.org, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, skhan@linuxfoundation.org References: <20201111043304.GS17076@casper.infradead.org> From: Shuah Khan Message-ID: Date: Wed, 11 Nov 2020 09:03:20 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.3.2 MIME-Version: 1.0 In-Reply-To: <20201111043304.GS17076@casper.infradead.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/10/20 9:33 PM, Matthew Wilcox wrote: > On Tue, Nov 10, 2020 at 12:53:26PM -0700, Shuah Khan wrote: >> There are a number of atomic_t usages in the kernel where atomic_t api >> is used strictly for counting sequence numbers and other statistical >> counters and not for managing object lifetime. > > We already have something in Linux called a sequence counter, and it's > different from this. ID counter? instance number? monotonic_t? stat_t? > No results for monotonic_t or stat_t. Can you give me a pointer to what your referring to. thanks, -- Shuah