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=-2.7 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, URIBL_BLOCKED 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 16A2FC433DB for ; Fri, 12 Feb 2021 21:05:12 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id AB45864E05 for ; Fri, 12 Feb 2021 21:05:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AB45864E05 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 3D7868D008F; Fri, 12 Feb 2021 16:05:11 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 3861B8D0060; Fri, 12 Feb 2021 16:05:11 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 29C018D008F; Fri, 12 Feb 2021 16:05:11 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0236.hostedemail.com [216.40.44.236]) by kanga.kvack.org (Postfix) with ESMTP id 13C778D0060 for ; Fri, 12 Feb 2021 16:05:11 -0500 (EST) Received: from smtpin19.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id AF72112D4 for ; Fri, 12 Feb 2021 21:05:10 +0000 (UTC) X-FDA: 77810845980.19.20976B9 Received: from mail-lj1-f179.google.com (mail-lj1-f179.google.com [209.85.208.179]) by imf23.hostedemail.com (Postfix) with ESMTP id 67A98A0009C5 for ; Fri, 12 Feb 2021 21:05:10 +0000 (UTC) Received: by mail-lj1-f179.google.com with SMTP id g11so651404ljj.7 for ; Fri, 12 Feb 2021 13:05:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=sbjxvXETQ6j1I+XE78CycXkHwpX2+wbGS1inRasjIr8=; b=Al/iMWmOf7Gd9oFlnEXwvenLfFIsVMK4Ry7fXXndiMOM82g1G9FlGVgp5SVX0+mvGs WYJXgl7thHsaalmZRlJ/ar1b1A54ekTvFlQpsGO78qxDH1iY+sD72PF34Ddsm9d7bPV4 l5pJKgBOXZ8uibbPiqdUkuLBRtYbZhtLsZ2db7YE64odxEeO+4NIPXTdAPaO28v6Xo18 7grwkYotKThMyPsVmbv1sRMpNBTj6g+AOpsfMSYyq9+fNzoAcQ3JJlOl/kjWlxH4RtRE JG/Jn9SnfYC0T3PCQv9e1M88rDovWpB52fI7nBS7cNykXPAqFbJdBEzkzZ0TUgmsjxpL zH0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=sbjxvXETQ6j1I+XE78CycXkHwpX2+wbGS1inRasjIr8=; b=Pa0wvnZlTN6YUBxbs0FwkBx1X3KmmS0cu0CLwpo4mh4TMN5SN5qXt3/BCXPUYsopqR amfmx7tBp+qVPTsN5gnsufz6geZpC1DNrPxbR+R1gAPCot2W6JLqTpfQhRoSYuccW4Cc /PwsgfgJufEmIyNFIaleuiDsCNfuyPcWUrQ4baYMa0F45a3tdRfkRKnM2Dvf8hWgcpdF LXCy/3L/fADKZyxFDveN1bh+cXMrXT2Pz9KghystEeXvlxwbUUU4A+9beXUrjagi+uxH j2MDdbe7pzDc5hWupBYlhxtwbIF0/za2F/l/JLf3SIkilxlmik2gYQVd4TS83dRP4b0C /JUQ== X-Gm-Message-State: AOAM533PyW86xXecT1WsceSTfVOhshvVvx+8OCXUiqkScw6XExcPbT8k mLGHOgv76E3JJPkYKu0YqUWsq2BidqGrwbluG44= X-Google-Smtp-Source: ABdhPJxt7EFnIwL+LdVfknDOokIu3H1OBKy7uZzacZS8PnSHmFx6tCyCijFpf5OcXDQzHrvbB5Nz18inr1afODxxbsg= X-Received: by 2002:a2e:9655:: with SMTP id z21mr1557918ljh.486.1613163908673; Fri, 12 Feb 2021 13:05:08 -0800 (PST) MIME-Version: 1.0 References: <20210212183107.50963-1-songliubraving@fb.com> In-Reply-To: <20210212183107.50963-1-songliubraving@fb.com> From: Alexei Starovoitov Date: Fri, 12 Feb 2021 13:04:56 -0800 Message-ID: Subject: Re: [PATCH v7 bpf-next 0/3] introduce bpf_iter for task_vma To: Song Liu Cc: bpf , Network Development , linux-mm , Alexei Starovoitov , Daniel Borkmann , Kernel Team , Andrew Morton Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 67A98A0009C5 X-Stat-Signature: dcbftj7ohsrjd1aobfujtrk38xnxqbtg Received-SPF: none (gmail.com>: No applicable sender policy available) receiver=imf23; identity=mailfrom; envelope-from=""; helo=mail-lj1-f179.google.com; client-ip=209.85.208.179 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1613163910-766671 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Feb 12, 2021 at 10:31 AM Song Liu wrote: > > This set introduces bpf_iter for task_vma, which can be used to generate > information similar to /proc/pid/maps. Patch 4/4 adds an example that > mimics /proc/pid/maps. > > Current /proc//maps and /proc//smaps provide information of > vma's of a process. However, these information are not flexible enough to > cover all use cases. For example, if a vma cover mixed 2MB pages and 4kB > pages (x86_64), there is no easy way to tell which address ranges are > backed by 2MB pages. task_vma solves the problem by enabling the user to > generate customize information based on the vma (and vma->vm_mm, > vma->vm_file, etc.). > > Changes v6 => v7: > 1. Let BPF iter program use bpf_d_path without specifying sleepable. > (Alexei) Applied. Thanks!