From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-3.2 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_HI,T_DKIM_INVALID, T_RP_MATCHES_RCVD shortcircuit=no autolearn=no autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id BF5311F406 for ; Wed, 17 Jan 2018 23:42:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754552AbeAQXmN (ORCPT ); Wed, 17 Jan 2018 18:42:13 -0500 Received: from mail-it0-f48.google.com ([209.85.214.48]:41509 "EHLO mail-it0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754162AbeAQXmM (ORCPT ); Wed, 17 Jan 2018 18:42:12 -0500 Received: by mail-it0-f48.google.com with SMTP id b77so11338328itd.0; Wed, 17 Jan 2018 15:42:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc:content-transfer-encoding; bh=i9IpxsUGeM7Q75rjs5UTeNO1P8wenXAUBp6BQqPE3ck=; b=KMFefd94VZwV8kMuz51nQYtYOeyObGFewShZQI/YBwO3mDGvxdLQWwkOBApJdh7i2s 76Ybv5AupogpAMMpcBy2AZmtS1JIQGvwgSRg7rL6BK7yH7UP1Dmq05uN8Bl6U+R7gRar 7GFvuK8GEYWa9CmJoBzGwv/+c/BRLLpuEOClLhubcKHOEN1b6R9jRQCllz93NVuOzYRH 3yIZV1/zpNDTiAhTGZClW51qlxmbj9ZZ8TsksFbSAY0DVHgpnCVi1VfNT9qnA63Amfu8 YIhRAGaJR50zyB+hZLnG+HA+zQTwTtK/YZm5jaN+0+hB4r8lN988PF4+qiRn2XH+ChRA u3JA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc:content-transfer-encoding; bh=i9IpxsUGeM7Q75rjs5UTeNO1P8wenXAUBp6BQqPE3ck=; b=fz6LfP0HqzNnFrp4ahtb8zhtGVhQ4WSbPi0JCscnDRnwC48fz0Vumi7ko9B4W9itv6 CJBXqbKVFIySu6W1jQpRlD2pmuj3YlTt9noR0qjzw6rK2RQE5izCHl8Wxg83ENOMG4Ep J/ix32jHmneLFL5UwEow1CxguMLfxrNIMaAmcKVgdlkC47NLkD59PipP5WcEMUkbkpwE AZBljO/ZyAnOppIFAmHM0rwrset6hrqbsW3ztZQ4JAfdIDTGVbYQf/RVP0DPjcsHQP+a 3R2CaRA5fMS4qEWBm3q0C0n2YK/S6lznalsinG0gIjFvvNUFy/Q4AyZ9YmJ4xvggx6Mo RF6g== X-Gm-Message-State: AKwxytfEksE/FgTvDIPJ79OVJVuGG+7PXwAgU2uRaZz709ovDLsJpoE5 vRta0mVjuzGMgsnAQB6g5eQQb8mGGDe4sYfpmfo= X-Google-Smtp-Source: ACJfBovxii7vZEQ1t95SFmuDvaAQpJ6D7wbXHsLv2MWxuWz5kBsYYIvbYjeRc40YICVG2L9QwuDAps/89/XTwOf7qjw= X-Received: by 10.36.204.85 with SMTP id x82mr23076055itf.21.1516232531360; Wed, 17 Jan 2018 15:42:11 -0800 (PST) MIME-Version: 1.0 Received: by 10.107.6.147 with HTTP; Wed, 17 Jan 2018 15:42:10 -0800 (PST) In-Reply-To: <87efmohy8s.fsf@evledraar.gmail.com> References: <20180117184828.31816-1-hch@lst.de> <87h8rki2iu.fsf@evledraar.gmail.com> <87efmohy8s.fsf@evledraar.gmail.com> From: Linus Torvalds Date: Wed, 17 Jan 2018 15:42:10 -0800 X-Google-Sender-Auth: pvipeEzlO12E2hpbfDoC7CW9YYw Message-ID: Subject: Re: [PATCH] enable core.fsyncObjectFiles by default To: =?UTF-8?B?w4Z2YXIgQXJuZmrDtnLDsCBCamFybWFzb24=?= Cc: Junio C Hamano , Christoph Hellwig , Git Mailing List , linux-fsdevel , Roberto Tyley Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org On Wed, Jan 17, 2018 at 3:16 PM, =C3=86var Arnfj=C3=B6r=C3=B0 Bjarmason wrote: > > Or does overall FS activity and raw throughput (e.g. with an ISO copy) > matter more than general FS contention? Traditionally, yes. Also note that none of this is about "throughput". It's about waiting for a second or two when you do a simple "git commit" or similar. Also, hardware has changed. I haven't used a rotational disk in about 10 years now, and I don't worry about latencies so much more. The fact that you get ~100k iops indicates that you probably aren't using those stupid platters of rust either. So I doubt you can even trigger the bad cases. Linus