From owner-freebsd-fs@freebsd.org Sat Oct 28 23:49:50 2017 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3857CE50E9C for ; Sat, 28 Oct 2017 23:49:50 +0000 (UTC) (envelope-from cse.cem@gmail.com) Received: from mail-io0-f171.google.com (mail-io0-f171.google.com [209.85.223.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0A0F0B6C; Sat, 28 Oct 2017 23:49:49 +0000 (UTC) (envelope-from cse.cem@gmail.com) Received: by mail-io0-f171.google.com with SMTP id 134so19885906ioo.0; Sat, 28 Oct 2017 16:49:49 -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:reply-to:in-reply-to:references :from:date:message-id:subject:to:cc; bh=7XDEBJh5b/hGKN0UiTWitGd9cbqgi3YytbWgbx3TZfk=; b=J6hpdZlWuzau/VhkbnLiRcD+UbX/hsfnpj0Qi35TBQuwijb11Zbgix+7RvJu8VnfbE SgXTKtqXYJD7gqRonoj0iDr/AMVEY0agKAFKq8UaxqX8BMqKfY+rFMW0yRe2HVn+0PkI YA8x3gX6iqvPYpHLIaxzmKPmGsoh2DIxEERumMeZ28O1BtfDxeLiTJxO0vQ1t4JRDESs RDYY5T6KjgwLK4/JgIO/RK0Zd+0ztub4/1TNoBSVOch2OHpawVXOXxZqvYLxE32EA7CP G824j9BD2+uQUuRCyQsGs5WZdayZTZzUKHvXwXjiqQqhGoQA5/jcgneF2uDiXu0pE8NK Vl8g== X-Gm-Message-State: AMCzsaWc59gq3bIaZtjsE66SvU4vjOQn7rkM+Tcb0nMzCuraIDvqJ8z6 N9v2ZXlcN90OGZoB2tTUqdc2aaRL X-Google-Smtp-Source: ABhQp+RMJLV4gVc3uXOOSM+98hEfW6D71vnilhay6kuKJNOhHgz/f09Xs2KDWJcX95bHXzN6xQascw== X-Received: by 10.36.29.208 with SMTP id 199mr680648itj.40.1509234099913; Sat, 28 Oct 2017 16:41:39 -0700 (PDT) Received: from mail-io0-f180.google.com (mail-io0-f180.google.com. [209.85.223.180]) by smtp.gmail.com with ESMTPSA id r124sm261273ita.13.2017.10.28.16.41.39 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 28 Oct 2017 16:41:39 -0700 (PDT) Received: by mail-io0-f180.google.com with SMTP id b186so19867929iof.8; Sat, 28 Oct 2017 16:41:39 -0700 (PDT) X-Received: by 10.36.1.136 with SMTP id 130mr655243itk.119.1509234099608; Sat, 28 Oct 2017 16:41:39 -0700 (PDT) MIME-Version: 1.0 Reply-To: cem@freebsd.org Received: by 10.2.164.130 with HTTP; Sat, 28 Oct 2017 16:41:38 -0700 (PDT) In-Reply-To: <201710282225.v9SMPDCZ074228@chez.mckusick.com> References: <20171027153859.GC2385@raichu> <201710282225.v9SMPDCZ074228@chez.mckusick.com> From: Conrad Meyer Date: Sat, 28 Oct 2017 16:41:38 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: softdep as a mount(8) option To: Kirk McKusick Cc: Mark Johnston , freebsd-fs@freebsd.org Content-Type: text/plain; charset="UTF-8" X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Oct 2017 23:49:50 -0000 On Sat, Oct 28, 2017 at 3:25 PM, Kirk McKusick wrote: > While it is safe and possible to add soft-updates (but not journalled > soft updates) as a mount option, it means that fsck will not know that > soft updates were in use, so it will always run in full (slow) mode at > boot time. This is why I have not added it as an option. Hi Kirk, Would it be possible to add a bit, like the dirty bit, that fsck can use to determine that the last mount of a filesystem used SU? That way we can retain fsck performance at the same time as enabling mount-time choice of SU. Best, Conrad