From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f69.google.com (mail-pg0-f69.google.com [74.125.83.69]) by kanga.kvack.org (Postfix) with ESMTP id A681D6B0033 for ; Tue, 26 Dec 2017 22:05:40 -0500 (EST) Received: by mail-pg0-f69.google.com with SMTP id f8so21912598pgs.9 for ; Tue, 26 Dec 2017 19:05:40 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org. [65.50.211.133]) by mx.google.com with ESMTPS id y15si23875675pfe.78.2017.12.26.19.05.39 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 26 Dec 2017 19:05:39 -0800 (PST) Date: Tue, 26 Dec 2017 19:05:34 -0800 From: Matthew Wilcox Subject: Re: [PATCH v5 05/78] xarray: Replace exceptional entries Message-ID: <20171227030534.GA24828@bombadil.infradead.org> References: <20171215220450.7899-1-willy@infradead.org> <20171215220450.7899-6-willy@infradead.org> <20171226171542.v25xieedd46y5peu@node.shutemov.name> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171226171542.v25xieedd46y5peu@node.shutemov.name> Sender: owner-linux-mm@kvack.org List-ID: To: "Kirill A. Shutemov" Cc: linux-kernel@vger.kernel.org, Matthew Wilcox , Ross Zwisler , David Howells , Shaohua Li , Jens Axboe , Rehas Sachdeva , Marc Zyngier , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-usb@vger.kernel.org, linux-raid@vger.kernel.org On Tue, Dec 26, 2017 at 08:15:42PM +0300, Kirill A. Shutemov wrote: > > 28 files changed, 249 insertions(+), 240 deletions(-) > > Everything looks fine to me after quick scan, but hat's a lot of changes for > one patch... Yeah. It's pretty mechanical though. > > - if (radix_tree_exceptional_entry(page)) { > > + if (xa_is_value(page)) { > > if (!invalidate_exceptional_entry2(mapping, > > index, page)) > > ret = -EBUSY; > > invalidate_exceptional_entry? Are we going to leave the terminology here as is? That is a great question. If the page cache wants to call its value entries exceptional entries, it can continue to do that. I think there's a better name for them, but I'm not sure what it is. Right now, the page cache uses value entries to store: 1. Shadow entries (for workingset) 2. Swap entries (for shmem) 3. DAX entries I can't come up with a good name for these three things. 'nonpage' is the only thing which hasn't immediately fallen off my ideas list. But I think renaming exceptional entries in the page cache is a great idea, and I don't want to do it as part of this patch set ;-) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org