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 7E217E7716B for ; Wed, 4 Dec 2024 05:52:47 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 913BF6B007B; Wed, 4 Dec 2024 00:52:46 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 8C48E6B0082; Wed, 4 Dec 2024 00:52:46 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 78BD66B0083; Wed, 4 Dec 2024 00:52:46 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 4E7F66B007B for ; Wed, 4 Dec 2024 00:52:46 -0500 (EST) Received: from smtpin23.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id BCB22A0D8E for ; Wed, 4 Dec 2024 05:52:45 +0000 (UTC) X-FDA: 82856207070.23.5A2DA97 Received: from nyc.source.kernel.org (nyc.source.kernel.org [147.75.193.91]) by imf26.hostedemail.com (Postfix) with ESMTP id 7A2B7140004 for ; Wed, 4 Dec 2024 05:52:33 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=vR9rT1kO; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf26.hostedemail.com: domain of djwong@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=djwong@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1733291551; a=rsa-sha256; cv=none; b=HEc0+80rmc9KkxNOMDn0ddGhcBPmLicJ2QDbimHg+vh/NxfQI2jN/gi6Oj9PF2w5Lt9GK/ TbE9yuX5UpZqMVUlhN+gPKS43lBBu21Cjeazv2avtB2InXE+0uBtQ7LwKtvgtYfv3FUNdl 7Glps3JAF5Q/0jZqMcYhJglJCy0cWJ4= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=vR9rT1kO; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf26.hostedemail.com: domain of djwong@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=djwong@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1733291551; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=nyD4m8Rx+QOalfDAHNNU31uqvzVXWBiFfXlqOXeL9nE=; b=PjW95uZK/yB02IxYi0hc0MGOgAxvx/Wr3qAZ3VGb/s7iiDpuY5Zko2yk2ReBdV0S0nWPwh te9LqhCT6usaLimZ2Po3RTzMshUigXrFfH4b8ggILt0kWkT9wt/BfoNW7DO0bhjZNE2r6d zNi3kMXZRnv5fqK6CqQEaH61CD3XKew= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id EC6E5A40F03; Wed, 4 Dec 2024 05:50:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6EAA1C4CED1; Wed, 4 Dec 2024 05:52:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733291562; bh=6PH4CBuizRBwQhle5LobHoTfnjtbvPyw5NCKz/3TYD4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=vR9rT1kOjE0K0HJVhuntdO9rLvhDl4El72OFHK2KZrcXjKiVQkw3IZ8ebT26t/qjo hvBbw9lKOKXzvz6m2vrG7q5nmnRCq3g7wSGlU18VmvN6jlGZo3Va+6XBJOoYqg+7Gr 9be/SMlV5+sgkXmwqt0uiuzGQZtMHIGCCOI8S9EDS0Wl/3eoCo84cfmcff9XrZ4oRy VtCqvpPMCObkL+yeSRKXKXOFzUHdwEGg3Kz+xnbHe3/8pbAyiBKPmkMCdHS6jTDXhx ZR0o+vhl9909R9IK5489QgjldCAMcoetjFe20D7eAXNVHlabBLgdcGHTHmPH7b6zz+ 7f5nxVwi7kqcQ== Date: Tue, 3 Dec 2024 21:52:41 -0800 From: "Darrick J. Wong" To: Jens Axboe Cc: "Christoph Lameter (Ampere)" , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, hannes@cmpxchg.org, clm@meta.com, linux-kernel@vger.kernel.org, willy@infradead.org, kirill@shutemov.name, bfoster@redhat.com Subject: Re: [PATCHSET v6 0/12] Uncached buffered IO Message-ID: <20241204055241.GA7820@frogsfrogsfrogs> References: <20241203153232.92224-2-axboe@kernel.dk> <668f271f-dc44-49e1-b8dc-08e65e1fec23@kernel.dk> <36599cce-42ba-ddfb-656f-162548fdb300@gentwo.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 7A2B7140004 X-Stat-Signature: ccyamsrhrynt18yx9x9z6uejmizajp5r X-Rspam-User: X-HE-Tag: 1733291553-19195 X-HE-Meta: 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 KomXgDfR F2x9b7mDCJubqzjB6xDUwnVmCe/gUmqfTfTO8pXp3K0ClyXfbsVaYrD/T7y3wDPB1hWDNEG1uPRot63HrMA/nMZyk50uFHCMRVxmDHrvL1Nng6H+cAZJt7u9MsmGgZuueezPZ1s+vwhOc3CEkMcipboq32tPfftdrRx+T/JU8ZaxmK6fyyGiJhvttl0sCZDUl990Y76qgoqxEbSFnZ7knb+Q7/FmRpmriWcSB7lY3/FF7teXk1FZL8RlqxtVV4WS5Zu15 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000002, 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 Tue, Dec 03, 2024 at 03:41:53PM -0700, Jens Axboe wrote: > On 12/3/24 3:16 PM, Christoph Lameter (Ampere) wrote: > > On Tue, 3 Dec 2024, Jens Axboe wrote: > > > >> I actually did consider using some form of temporal, as it's the only > >> other name I liked. But I do think cached_uncached becomes pretty > >> unwieldy. Which is why I just stuck with uncached. Yes I know it means > >> different things in different circles, but probably mostly an overlap > >> with deeper technical things like that. An honestly almost impossible to > >> avoid overlap these days, everything has been used already :-) > >> > >> IOW, I think uncached is probably still the most descriptive thing out > >> there, even if I'm certainly open to entertaining other names. Just not > >> anything yet that has really resonated with me. > > > > How about calling this a "transitory" page? It means fleeting, not > > persistent and I think we have not used that term with a page/folio yet. > > I also hit the thesaurus ;-) > > I'm honestly not too worried about the internal name, as developers can > figure that out. It's more about presenting an external name that sys > developers will not need a lot of explaining to know what it's about. > And something that isn't too long. BRIEFLY_CACHED? TRANSIENT_CACHE? > > Dunno, I keep going back to uncached as it's pretty easy to grok! RWF_DONTCACHE, to match {I,DCACHE}_DONTCACHE ? ;) They sound pretty similar ("load this so I can do something with it, evict it immediately if possible") though I wouldn't rely on people outside the kernel being familiar with the existing dontcaches. --D > -- > Jens Axboe > >