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Fri, 02 Sep 2022 13:23:40 -0700 (PDT) Received: from [192.168.1.136] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id z10-20020a62d10a000000b00535d094d6ecsm2197822pfg.108.2022.09.02.13.23.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 02 Sep 2022 13:23:38 -0700 (PDT) Message-ID: <002ab1f2-078e-2bce-83a0-257a573b1f95@kernel.dk> Date: Fri, 2 Sep 2022 14:23:34 -0600 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:102.0) Gecko/20100101 Thunderbird/102.1.2 Subject: Re: [RFC PATCH 00/30] Code tagging framework and applications Content-Language: en-US To: Kent Overstreet Cc: Roman Gushchin , Yosry Ahmed , Michal Hocko , Mel Gorman , Peter Zijlstra , Suren Baghdasaryan , Andrew Morton , Vlastimil Babka , Johannes Weiner , dave@stgolabs.net, Matthew Wilcox , liam.howlett@oracle.com, void@manifault.com, juri.lelli@redhat.com, ldufour@linux.ibm.com, Peter Xu , David Hildenbrand , mcgrof@kernel.org, masahiroy@kernel.org, nathan@kernel.org, changbin.du@intel.com, ytcoode@gmail.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, Steven Rostedt , bsegall@google.com, bristot@redhat.com, vschneid@redhat.com, Christoph Lameter , Pekka Enberg , Joonsoo Kim , 42.hyeyoo@gmail.com, glider@google.com, elver@google.com, dvyukov@google.com, Shakeel Butt , Muchun Song , arnd@arndb.de, jbaron@akamai.com, David Rientjes , minchan@google.com, kaleshsingh@google.com, kernel-team@android.com, Linux-MM , iommu@lists.linux.dev, kasan-dev@googlegroups.com, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-modules@vger.kernel.org, Linux Kernel Mailing List References: <20220831190154.qdlsxfamans3ya5j@moria.home.lan> <20220901223720.e4gudprscjtwltif@moria.home.lan> <20220902001747.qqsv2lzkuycffuqe@moria.home.lan> <3a41b9fc-05f1-3f56-ecd0-70b9a2912a31@kernel.dk> <20220902194839.xqzgsoowous72jkz@moria.home.lan> <20220902200555.h5fyamst6lyamjnw@moria.home.lan> From: Jens Axboe In-Reply-To: <20220902200555.h5fyamst6lyamjnw@moria.home.lan> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On 9/2/22 2:05 PM, Kent Overstreet wrote: > On Fri, Sep 02, 2022 at 01:53:53PM -0600, Jens Axboe wrote: >> I've complained about memcg accounting before, the slowness of it is why >> io_uring works around it by caching. Anything we account we try NOT do >> in the fast path because of it, the slowdown is considerable. > > I'm with you on that, it definitely raises an eyebrow. > >> You care about efficiency now? I thought that was relegated to >> irrelevant 10M IOPS cases. > > I always did, it's just not the only thing I care about. It's not the only thing anyone cares about. -- Jens Axboe