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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4E40CF395D for ; Thu, 19 Sep 2024 16:53:21 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 495126B0092; Thu, 19 Sep 2024 12:53:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 444B06B0093; Thu, 19 Sep 2024 12:53:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2BE296B0095; Thu, 19 Sep 2024 12:53:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 0DE526B0092 for ; Thu, 19 Sep 2024 12:53:21 -0400 (EDT) Received: from smtpin30.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id A783D80E93 for ; Thu, 19 Sep 2024 16:53:20 +0000 (UTC) X-FDA: 82582083360.30.3E0ECB0 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf14.hostedemail.com (Postfix) with ESMTP id DDE3A10000A for ; Thu, 19 Sep 2024 16:53:18 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=sCf15Y6D; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf14.hostedemail.com: domain of jlayton@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=jlayton@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1726764715; a=rsa-sha256; cv=none; b=h1xjAmkdcYIeR8dvYS7eNFy9NBmm7oZ8a9mbYKhPpb95YxcdE+hLVu7Wajs0WAlZ/H0Ol0 PPVZ05G4DKi4mRFvcddX763o9CTtrP6tBVGYKLvgs5W5tIVjJqYkkVhFGWpTMeuZs5Td/X 7Lh9M7uqTwH0+oLotC680Q/nfCo65Qs= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=sCf15Y6D; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf14.hostedemail.com: domain of jlayton@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=jlayton@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1726764715; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Je6wFZQCPBSr3AfMwUUK1hMoXTyJ5WbhpknR8qleYo0=; b=LNvnED7Z6UcstQShKWbf93V9GA9vFYw2RON4CteEaD5f3ZCSvITCFMT7ttyoNtXyLqNX5C tshSN3Oxpsd9IrmSZtLERBtWaM3vuLI5mFsF1h3AW3486Zg9M+YHwZJhpFi14Gfl78NLwX bB2WvbcZHJ8CdS8E8YFnnCw7cTFsuJs= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 3009F5C5946; Thu, 19 Sep 2024 16:53:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2EAD2C4CEC4; Thu, 19 Sep 2024 16:53:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1726764797; bh=Je6wFZQCPBSr3AfMwUUK1hMoXTyJ5WbhpknR8qleYo0=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=sCf15Y6D/7qLmt1xcsgp5oTgn1LEKq4le6ePb9p9YwzGRjGr+qLAxw75M8+pDVGbT dK15XZfncqIHLYA5wv5JQkEHFjZ4CXbMBeCXH7V2xjSNfcSjOJ41k+GQXYMyUPPzuK h0Dp5PJ+i6kDSWwDnrkBUjlQ/T/TJatoTrQqwILsXx0bzQzBMbQ6czqCwynhWk1haq eUTSbgXSYMMuw27mt9XyZpEM3mo3URy7tZhnx8ZcdIYUfBPScOPOuoOmidUzRcGuTA Gzf3z9RldS/pC6TnxC7qzGMygheQV64sIrnqfAQckyEqZDuPYhtJo1TOKjYRUqdCa3 RKFw8TYK2280Q== Message-ID: <135fb33cc23ba1ff07045637916e44f6d6614851.camel@kernel.org> Subject: Re: [PATCH v8 07/11] Documentation: add a new file documenting multigrain timestamps From: Jeff Layton To: Bagas Sanjaya , John Stultz , Thomas Gleixner , Stephen Boyd , Alexander Viro , Christian Brauner , Jan Kara , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , Chandan Babu R , "Darrick J. Wong" , Theodore Ts'o , Andreas Dilger , Chris Mason , Josef Bacik , David Sterba , Hugh Dickins , Andrew Morton , Chuck Lever , Vadim Fedorenko Cc: Randy Dunlap , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-mm@kvack.org Date: Thu, 19 Sep 2024 18:53:08 +0200 In-Reply-To: References: <20240914-mgtime-v8-0-5bd872330bed@kernel.org> <20240914-mgtime-v8-7-5bd872330bed@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 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 gf50yCop bhFYIy98s9fG1vjvzVYRXhHQc8MO3EwBOII7mUQj8YNgJhJGn6o8ATxn2KRHQqmcSTW+G55FYKO+ToHf16lBkgaGAj9Z7CsbzPG4tsi7RXzjY/wXKPd35JLsl3K8liPxdvwYY0peTaddwrmvN2YQgQcIBz+Kp0/cRwBEsCpAOZNLthmb4sud3IAHijGA7jnUa4pvXx8ZbfdVBDb9uvtbBqBbUVEhPsuHB8eGuu9UH+JD+f0VEIOhGsskv/KYdytV6iRMd6tmT6nzOZsw= 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: List-Subscribe: List-Unsubscribe: On Mon, 2024-09-16 at 08:01 +0700, Bagas Sanjaya wrote: > On Sat, Sep 14, 2024 at 01:07:20PM -0400, Jeff Layton wrote: > > +Multigrain timestamps aim to remedy this by selectively using fine-gra= ined > > +timestamps when a file has had its timestamps queried recently, and th= e current > > +coarse-grained time does not cause a change. >=20 > Do you mean using fine-grained timestamps when timestamps of a file has b= een > recently queried/modified BUT its coarse-grained timestamps aren't change= d? >=20 > Confused... >=20 Yes, I'll do an s/and/but/ there in the Documentation. Basically, we want to avoid updating the floor whenever we can (since it's a global variable), so we only get a fine-grained time if there is no other way to effect a change to the timestamps. Thanks! --=20 Jeff Layton