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=-4.3 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,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 5001AC43470 for ; Thu, 1 Apr 2021 10:37:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1B921610CF for ; Thu, 1 Apr 2021 10:37:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233760AbhDAKhM (ORCPT ); Thu, 1 Apr 2021 06:37:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233834AbhDAKg5 (ORCPT ); Thu, 1 Apr 2021 06:36:57 -0400 Received: from mail-wm1-x331.google.com (mail-wm1-x331.google.com [IPv6:2a00:1450:4864:20::331]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 14210C0613E6 for ; Thu, 1 Apr 2021 03:20:56 -0700 (PDT) Received: by mail-wm1-x331.google.com with SMTP id t5-20020a1c77050000b029010e62cea9deso639720wmi.0 for ; Thu, 01 Apr 2021 03:20:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=ij80DQ2jXL9m+Z8sKUpY0+iZaeIx94t+CnoHMJlBPT4=; b=NrSusv6/zPxMwFyQXF4tHJ920EGIB2nBqUdud6pxA4ltrNxvwDnkoM70Svzufil3zo yWrC8bwJbbBSjFvHSycSuq92hnJl/DMyRJ19W9ViWcF8+AY+GFvDD0l9wTSdZalZ7Gqb Sl38CRch1kTmBZkNAEkJjs+3hZhmB0jTFhfyPFi5TmM4oxmyoyWMtNxxN7j43mr5jIWH MF1k5gUoILM4ZcTl29pwCFK0WEaH5dm6wclnCCaJIUJ9UxV0Qbp3u3uDb4G0tf9em/Mf 5AB9Eo9DhE3NBvCeCSPfhM1y+ch4UFTDAtSpiizNEn5FDbeCktFgL8GEHwYie3IO3GtF RgVw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=ij80DQ2jXL9m+Z8sKUpY0+iZaeIx94t+CnoHMJlBPT4=; b=h3xE590voe6vsiUVenwVBlmKknPMoXLKvr/tyLYapHhWiq1DaDgLBgDm7+RY2uloKO X8IjG45TBbWXdjVZJbrrl91AjkFeUraX0BqBK88IYX+zS0z+almCJJIwSCNUbbC1bhKB dFE6zDG4uUIunig91xEwY3DireteFujZAO61VvPs0XIzyelqcXvJVLTyexPoQy5k8Xmt q9dK/m9HT53J2QPFBYMzvR5boiL7Ch7v/rFjXXkNvXWNB9EZUbyMNayWhVLmMkaOMwqe 6oiJn1czyb6D53NZD8t6UE09DPfm+QGQgoa82NmiXCpNZt61iTWnDCcyfIvnkLc9IvQ3 mVmQ== X-Gm-Message-State: AOAM533r8KvnfPtzO3bNmSecDDQ/3v0DsC0682/ZNPS5J46Rd0b7hKv9 UaphhyjLjDhytg9xZrXFCd3yVS4o9Je2Ew== X-Google-Smtp-Source: ABdhPJw9EOOpzFLwKQ3Bq65ps8+Tkx1/U+WXFmcRZN5gCS3vz8UApL5id+jC2TKgqtmLq9XXlZYwoQ== X-Received: by 2002:a05:600c:290a:: with SMTP id i10mr7449478wmd.91.1617272454697; Thu, 01 Apr 2021 03:20:54 -0700 (PDT) Received: from [192.168.44.27] (dynamic-046-114-002-143.46.114.pool.telefonica.de. [46.114.2.143]) by smtp.gmail.com with ESMTPSA id p18sm12450018wro.18.2021.04.01.03.20.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 01 Apr 2021 03:20:54 -0700 (PDT) Subject: Re: Any ideas what this warnings are about? To: Chris Murphy Cc: Btrfs BTRFS References: <43acc426-d683-d1b6-729d-c6bc4a2fff4d@gmail.com> <20210331015827.GV32440@hungrycats.org> From: Markus Schaaf Message-ID: Date: Thu, 1 Apr 2021 12:20:51 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.9.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB-large Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Am 31.03.21 um 22:20 schrieb Chris Murphy: > Flushoncommit is safe but noisy in dmesg, and can make things slow it > just depends on the workload. And discard=async is also considered > safe, though relatively new. The only way to know for sure is disable > it, and only it, run for some time period to establish "normative" > behavior, and then enable only this option and see if behavior changes > from the baseline > [...] Thank you for your detailed explanation. I was trying flushoncommit for better crash consistency. But this was based on theory, not experience. BR