From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6429BC6FA86 for ; Fri, 2 Sep 2022 20:06:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229988AbiIBUGH (ORCPT ); Fri, 2 Sep 2022 16:06:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51436 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229482AbiIBUGH (ORCPT ); Fri, 2 Sep 2022 16:06:07 -0400 Received: from out0.migadu.com (out0.migadu.com [94.23.1.103]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CB28AEA31A; Fri, 2 Sep 2022 13:06:04 -0700 (PDT) Date: Fri, 2 Sep 2022 16:05:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1662149163; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=SemCjjx9bqrqhFAABAkUIroCfCc94PYvIF1DVQSZFl4=; b=DkqxrENv1HGZgJN2jzLkuenZfiCKRaXUD9WzQJ4Gyv/ayHL/Rtg7Xzr8AwspMWXlwZIUIL u2b26PHc1vj3E0HNj7dQceY3+rADhcYIqCEweC9ErZkbq6yycckimIVL96EkhBo8Hg7QMq Oask9xF1FPTxe7xFqrU4hLkV5BMu+ow= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Kent Overstreet To: Jens Axboe 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 Subject: Re: [RFC PATCH 00/30] Code tagging framework and applications Message-ID: <20220902200555.h5fyamst6lyamjnw@moria.home.lan> 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Precedence: bulk List-ID: X-Mailing-List: linux-bcache@vger.kernel.org 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.