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 X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3BEF8C433E0 for ; Fri, 19 Mar 2021 16:28:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 152BD61980 for ; Fri, 19 Mar 2021 16:28:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230107AbhCSQ2T (ORCPT ); Fri, 19 Mar 2021 12:28:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52658 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229996AbhCSQ2A (ORCPT ); Fri, 19 Mar 2021 12:28:00 -0400 Received: from mail-qk1-x732.google.com (mail-qk1-x732.google.com [IPv6:2607:f8b0:4864:20::732]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BD2FCC06174A; Fri, 19 Mar 2021 09:27:59 -0700 (PDT) Received: by mail-qk1-x732.google.com with SMTP id 7so3471885qka.7; Fri, 19 Mar 2021 09:27:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=GB8fLktR1tASbymjnw9MkDMpjTuRuzJA8+s7LyK6qUQ=; b=eJed0rdQmwld1oV5DxS1T1YtkrbMaqJ1tOXo4HOxJxPS7I0t+1BK1131yQRBhY0c+0 +a19lDqoVbwMkqJ82rQqePPUQ9PQsCtUDy8dYdAWEZ6ojU4Wja4Sa4dsigEXtLkusiAX GwgC6POaDS39VhIA0yTzLD0JhB8xhftzQA/wNElUk22lu3izcL2tBGh+Cnki9jK2xWQ7 uhfknpBJPZZTt0x9RtA1Pmg8VO1WL63RdOe0FZCCxheqUERCc5UD+VlODkT+eU8ByBfJ EfFzXqR1JWhWqQx4m5oiK+OavkbxjJSsntwEFUP45GWG0Ec3ppbzWr26IleYojzHc/Q7 B2Yg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=GB8fLktR1tASbymjnw9MkDMpjTuRuzJA8+s7LyK6qUQ=; b=IQ5yrghe/62o7RFuT+f8CDu85WL2Rp8Yo0/NKScERYt62IICDkK7us8QPJPKghftWj 53vccPXRmKESZ1m4hc7mtsbPGJkKzTfascrvP2w/djnvf7+oyoBPQSpFCDMjDRxSi3Fd lzQmJ0t8tCv6o+pWWqqHjh1WA3tpOkvW4e6I5NTjxhqF8hqnMpurS5Yk7m0uErMPT4H5 AwOtJDRQyi73784cjRsBHC/zNJ58C0oU8GdzCcKY+3tBQHaVsHp5n09uoBJmZLgiKSx8 b+BZZeOERmzxoWlWeAWvvYoG70rEarhj3UxIVpAeyURPgyfqp20d/KpSostA0icmbDMt iPbQ== X-Gm-Message-State: AOAM533sRmWLlNvVDAffGRuyu769Kp/VVm+pAznLHnQDYG37fYJ4Y1j7 Z1vEKJLAsaCqhFp46VbL6cKd0yB2UydIrw== X-Google-Smtp-Source: ABdhPJy/VCPTl8fX2bMyhhXNPffa662QTa4mLfvAb7DD5SAuVqVKrO+huQdgRCH/0ahCgaRobzmFdg== X-Received: by 2002:a37:98f:: with SMTP id 137mr10025758qkj.357.1616171278841; Fri, 19 Mar 2021 09:27:58 -0700 (PDT) Received: from dschatzberg-fedora-PC0Y6AEN.dhcp.thefacebook.com ([2620:10d:c091:480::1:41da]) by smtp.gmail.com with ESMTPSA id p8sm4119303qtu.8.2021.03.19.09.27.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Mar 2021 09:27:58 -0700 (PDT) Date: Fri, 19 Mar 2021 12:27:55 -0400 From: Dan Schatzberg To: Shakeel Butt Cc: Andrew Morton , Jens Axboe , Tejun Heo , Zefan Li , Johannes Weiner , Michal Hocko , Vladimir Davydov , Hugh Dickins , Roman Gushchin , Muchun Song , Alex Shi , Alexander Duyck , Chris Down , Yafang Shao , Wei Yang , "open list:BLOCK LAYER" , open list , "open list:CONTROL GROUP (CGROUP)" , "open list:MEMORY MANAGEMENT" Subject: Re: [PATCH v10 0/3] Charge loop device i/o to issuing cgroup Message-ID: References: <20210316153655.500806-1-schatzberg.dan@gmail.com> <7ca79335-026f-2511-2b58-0e9f32caa063@kernel.dk> <8c32421c-4bd8-ec46-f1d0-25996956f4da@kernel.dk> <20210318164625.1018062b042e540bd83bb08e@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 19, 2021 at 09:20:16AM -0700, Shakeel Butt wrote: > One suggestion would be to make get_mem_cgroup_from_mm() more generic > (i.e. handle !mm && active_memcg() case) and avoid > get_mem_cgroup_from_current() as it might go away. Yeah, that occurred to me as well. I'll take a stab at doing that.