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=-6.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 5901AC4338F for ; Sat, 21 Aug 2021 01:53:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 25C6A611C3 for ; Sat, 21 Aug 2021 01:53:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232700AbhHUByB (ORCPT ); Fri, 20 Aug 2021 21:54:01 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:38033 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230172AbhHUByA (ORCPT ); Fri, 20 Aug 2021 21:54:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1629510801; 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=jExsKTkbgZ9THe3gvXb04/xzUylKYW//0jOKCF2Ka0w=; b=G0vT0arAHzMe7hO5BLmE9SkTIovLh9N0j0bM3PPA4IzW/D+7EraCyj7lBCQ0f8guoL8XyX RTyAcrQYpGz6/8Mpc1ohkQE/fq3tJKxd35Y0W2nGNGQJ3aCoTTcVW4Qycma9HF3lwbDbIv j8WIujSEIw681GH59y2SHxKDhTqLWv8= Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-38-OxQAi_lUNG2OT0tcGhS_uw-1; Fri, 20 Aug 2021 21:53:19 -0400 X-MC-Unique: OxQAi_lUNG2OT0tcGhS_uw-1 Received: by mail-io1-f71.google.com with SMTP id f10-20020a6b620a0000b02904e5ab8bdc6cso6491068iog.22 for ; Fri, 20 Aug 2021 18:53:19 -0700 (PDT) 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=jExsKTkbgZ9THe3gvXb04/xzUylKYW//0jOKCF2Ka0w=; b=IzzTaX0FYCr/HNSRug/w1O0xlAgmJ4c7IwtHHDycFGQQPNoSOtkcRaZmPPjs4K8uT2 6fx8XxEZLsNf9j0Q+h1MNgyw8V9pbRJTsoENDpIgM2Hb5u6+qWmcQmByi67cIL+PDEI+ il+zrvAuw7p80BM3tIVlx3IYHlh/tFyNhIE66IlX8Vnpa5Krq7XADJPqkN7Tzhlt85sT cBJ8ukt+8wAciGwH6Bys8X+oUwEH7vaE9+sruYxN6/Jb4efLAAZtsho6pIHsSxlHLMVw jmyYTYkFhFdekp6I4dZ2clqzzyQo7YQOaLmiMGC3Om/70owlYdcEGo5Lo1wFwGG9LKxg 6GmQ== X-Gm-Message-State: AOAM530ZV4796WpHIqUvp2i2Bd5vbSAXH+zGgGzm2k8lFwmUfPgf19j6 jlOvkRoqnyEZiQ9x8cvB7AoSYLlbp6IVHzxC0QY3MyClRY0fseS5nmmnHKw9w2LS0TJdKHyGuXA n+yoOzC6ySADPrYCPeAYEaYUK9J2e/+1SLMI+Ow== X-Received: by 2002:a5e:d80e:: with SMTP id l14mr18465276iok.79.1629510799162; Fri, 20 Aug 2021 18:53:19 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxuTPUuCMRo/Cac6U+GHzTG88mk6T/61oPkHlK87mThixxfx6MXSdCRzgrygXpKn4Yey0p65P+UxnsAf42QK2c= X-Received: by 2002:a5e:d80e:: with SMTP id l14mr18465265iok.79.1629510799009; Fri, 20 Aug 2021 18:53:19 -0700 (PDT) MIME-Version: 1.0 References: <20210818060134.208546-1-vshankar@redhat.com> <20210818060134.208546-3-vshankar@redhat.com> In-Reply-To: <20210818060134.208546-3-vshankar@redhat.com> From: Patrick Donnelly Date: Fri, 20 Aug 2021 21:52:53 -0400 Message-ID: Subject: Re: [RFC 2/2] ceph: add debugfs entries for v2 (new) mount syntax support To: Venky Shankar Cc: Jeff Layton , Ceph Development Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org On Wed, Aug 18, 2021 at 2:01 AM Venky Shankar wrote: > > [...] Is "debugfs" the right place for this? I do wonder if that can be dropped/disabled via some obscure kernel config? Also "debugX" doesn't sound like the proper place for a feature flag of the kernel. I just did a quick check on my system and I do see: $ ls /sys/fs/ext4/features batched_discard casefold encryption fast_commit lazy_itable_init meta_bg_resize metadata_csum_seed test_dummy_encryption_v2 verity Perhaps we need something similar for fs/ceph? -- Patrick Donnelly, Ph.D. He / Him / His Principal Software Engineer Red Hat Sunnyvale, CA GPG: 19F28A586F808C2402351B93C3301A3E258DD79D