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 44540C433FE for ; Tue, 22 Nov 2022 22:44:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234405AbiKVWoR (ORCPT ); Tue, 22 Nov 2022 17:44:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234076AbiKVWoQ (ORCPT ); Tue, 22 Nov 2022 17:44:16 -0500 Received: from mail-pg1-x52b.google.com (mail-pg1-x52b.google.com [IPv6:2607:f8b0:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C3A48B97C1; Tue, 22 Nov 2022 14:44:14 -0800 (PST) Received: by mail-pg1-x52b.google.com with SMTP id f3so15284125pgc.2; Tue, 22 Nov 2022 14:44:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc:subject:date:message-id :reply-to; bh=A7QwrVpaHP+ARj4TelpCmRFDWtNrt1GA5zbr41rCHDo=; b=OeCkJ5JDqe9091oZ+PsiWtr5DntRwkyWH1UKBvVVwBeg4eoxfPKLnk1PBieGZ0vRRM 2j0tZIMN1oXSXfp9+oqtdr+F9PJcbeTBy/8HNPQCyhoySu66QlGmSQg19YRni39q/jJr CncshkdAjwTvp81VdLBIED5iiePstDrp9PfhYSMovs1f3L1swkJWF5DZvC2bbdUYePjU QorfPjNlCBrQKkyRbHznWdnVzpcDsL9moeAgDG9NIPUa/iHk8ivJWTY/zdZrH2iK4cs3 yvwLVrztkZJrm70W3guQv9VYeSjqgUGxOKEWz0Xm+BQxw+gG7jMqeWdYfCLsvfxvQJw1 gEMw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=A7QwrVpaHP+ARj4TelpCmRFDWtNrt1GA5zbr41rCHDo=; b=NvnIIjFoF5Yvgg1uv+f9odDYvraztUsthMfjdVvpX6fwDdFE+6syVTIZ5AzZWIyEVt 9H62sDylJLmVgbA3t2KSd0Og2riCR/p2/jG84b/UiCDcuOSQ35jBPdieAo5BHx09p8VE HZQrIEmXM3uKqa1y1+sL3e1CY9gz/n+k9r5sDF1OVOvmkd+a0+BNhUpPK/GwG0F/ZViI s4hxndaPTVd6xxoB0maQC82+/Rl+ZpIJu+Wxa9Ohp1DYm9cerV3q38nTycfWiyKzgpin RrUok4BPvV9JKoivvecNm8EE+WLCFTb3vF9btkBPsNbdYBja7kG04GyXTCioaL4b8sg5 KnLw== X-Gm-Message-State: ANoB5pk/Radz4z/OV87pHaHlkY7278rsxByE6zYX94R0nV3qVxbW9S0C Eu8ZmywlPIDySiOeJmSsfjo= X-Google-Smtp-Source: AA0mqf46U0ekKGfqGRyjktGmlBF2/+vH7FzAXfBD71SUaspKv4p6zLuYGeVvzZ0fWGPJ+aZ5zw9zgQ== X-Received: by 2002:a62:1812:0:b0:56c:afe:e8bf with SMTP id 18-20020a621812000000b0056c0afee8bfmr6100174pfy.51.1669157054025; Tue, 22 Nov 2022 14:44:14 -0800 (PST) Received: from localhost ([2620:10d:c090:400::5:bb3]) by smtp.gmail.com with ESMTPSA id n9-20020a170902e54900b00172e19c2fa9sm11998309plf.9.2022.11.22.14.44.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Nov 2022 14:44:13 -0800 (PST) Sender: Tejun Heo Date: Tue, 22 Nov 2022 12:44:12 -1000 From: Tejun Heo To: David Vernet Cc: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, yhs@fb.com, song@kernel.org, sdf@google.com, john.fastabend@gmail.com, kpsingh@kernel.org, jolsa@kernel.org, haoluo@google.com, kernel-team@fb.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH bpf-next 0/4] Support storing struct cgroup * objects as kptrs Message-ID: References: <20221122055458.173143-1-void@manifault.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221122055458.173143-1-void@manifault.com> Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Mon, Nov 21, 2022 at 11:54:54PM -0600, David Vernet wrote: > In [0], we added support for storing struct task_struct * objects as > kptrs. This patch set extends this effort to also include storing struct > cgroup * object as kptrs. > > As with tasks, there are many possible use cases for storing cgroups in > maps. During tracing, for example, it could be useful to query cgroup > statistics such as PSI averages, or tracking which tasks are migrating > to and from the cgroup. > > [0]: https://lore.kernel.org/all/20221120051004.3605026-1-void@manifault.com/ > > David Vernet (4): > bpf: Enable cgroups to be used as kptrs > selftests/bpf: Add cgroup kfunc / kptr selftests > bpf: Add bpf_cgroup_ancestor() kfunc > selftests/bpf: Add selftests for bpf_cgroup_ancestor() kfunc >From cgroup POV: Acked-by: Tejun Heo Thanks. -- tejun