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 D7D66C77B61 for ; Sun, 16 Apr 2023 06:04:28 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DAC446B0074; Sun, 16 Apr 2023 02:04:27 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D5AF76B0075; Sun, 16 Apr 2023 02:04:27 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C4A1F6B0078; Sun, 16 Apr 2023 02:04:27 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id B48D66B0074 for ; Sun, 16 Apr 2023 02:04:27 -0400 (EDT) Received: from smtpin22.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 79BF61A017E for ; Sun, 16 Apr 2023 06:04:27 +0000 (UTC) X-FDA: 80686214574.22.8254CDE Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf27.hostedemail.com (Postfix) with ESMTP id 835E54000E for ; Sun, 16 Apr 2023 06:04:25 +0000 (UTC) Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=pcz9RqNq; spf=none (imf27.hostedemail.com: domain of BATV+5b9cc3a13a0ac595e3b9+7175+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+5b9cc3a13a0ac595e3b9+7175+infradead.org+hch@bombadil.srs.infradead.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1681625065; 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=3S2OOnJJ8beQt9IJrgqG2y+T0Oivm/faajqfKrVbumQ=; b=4HP+9lgfPF1t9ocLIWlwvWk79zBCkolEaZaa1Xcs3Bl/d6GYgFzaiAxXsXwcsP+Fa6iSib onBx8tol5ZVaMo0b6Py5xbidu+ZbPwlkQxWgHwgCauWZpS7VlBRgDSS6qj84b9PZm3ZEJ7 twEu9g5/qgEl9fvzPQUmmA5UZzEM05A= ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=pcz9RqNq; spf=none (imf27.hostedemail.com: domain of BATV+5b9cc3a13a0ac595e3b9+7175+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+5b9cc3a13a0ac595e3b9+7175+infradead.org+hch@bombadil.srs.infradead.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1681625065; a=rsa-sha256; cv=none; b=hnt+c7xSVd9Q46WxN1Rn+vBkut14MS/nuU6VF80ROQkPmbjble0h9i0slSOo7tYAePQDT2 bmbMSMeb4akcM+7E14LkBi0tzOrTJ5kU8Li15tkv27D/xTWI0XkNV79foXZfrYhhcR+JC7 fPJk46kRRl9ql66Pf3kMWMv3Ea9WrOU= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=3S2OOnJJ8beQt9IJrgqG2y+T0Oivm/faajqfKrVbumQ=; b=pcz9RqNqYSB4GSZ2YJL1uvq4xJ ssb58CLFAEtw81Rh6EiicB3PCWTtavS/EpV50BfW+W+AMlDiPFvx+H7AraQFjl89ABDxhF/zViGTm DZOcE13/EKgMq1duxT3w6kG3kJQUv5csC7edSTBesWvWmW31ggxL2U4QXiGWFp/xtpuFZ+sORdE0z pjB/RN38m6FN+Po4gObhsSTnSg9LCaQ7Z/lUD5VcDpdQzqU4/oPot+SIwWA/E9Cn4xe6Rs/vfFTJ3 ziKiIib3dxU3GShZFtVaXhDduJ3SC96gc34eY0IoiNgDbEUaIBsMAIsDILQuAbTd76V8tpMWiLFKN pBEpmt+w==; Received: from hch by bombadil.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1pnvUi-00DCX2-2h; Sun, 16 Apr 2023 06:04:12 +0000 Date: Sat, 15 Apr 2023 23:04:12 -0700 From: Christoph Hellwig To: Luis Chamberlain Cc: david@redhat.com, patches@lists.linux.dev, linux-modules@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, pmladek@suse.com, petr.pavlu@suse.com, prarit@redhat.com, torvalds@linux-foundation.org, gregkh@linuxfoundation.org, rafael@kernel.org, christophe.leroy@csgroup.eu, tglx@linutronix.de, peterz@infradead.org, song@kernel.org, rppt@kernel.org, dave@stgolabs.net, willy@infradead.org, vbabka@suse.cz, mhocko@suse.com, dave.hansen@linux.intel.com, colin.i.king@gmail.com, jim.cromie@gmail.com, catalin.marinas@arm.com, jbaron@akamai.com, rick.p.edgecombe@intel.com Subject: Re: [RFC 2/2] kread: avoid duplicates Message-ID: References: <20230414052840.1994456-1-mcgrof@kernel.org> <20230414052840.1994456-3-mcgrof@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230414052840.1994456-3-mcgrof@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 835E54000E X-Stat-Signature: 3ywd94z4fxsw13zmkxg8zy5oipga7der X-Rspam-User: X-HE-Tag: 1681625065-377866 X-HE-Meta: U2FsdGVkX1/gH5n7rAon336VrqNh7sqhOmSQcfJtJrNw86TyaRaB9WIDWncF0jr3cvTqUV2t47t56poOkE3A4p1hjzqnQMv9CFTNzDsDXI17xo4arLGlXBB/7uAvoQl2g5oRxKGAFT0UCDtPR70sIT2hrRNk3T4yypnTp0jT8zUfGsYE5siV/bitFj/RqmSOfqOdHwB8x5V5w7pf0z8+hbwU5hQFmIuDjtVm6QMsfJn1wuiNAIf0W1Ve9Di3wg1/pyvMZwhzg1uoJnb4wu44SqQPvjMSeVNiaTo1PspfLKJb8g2D/e2oAiJiWGlV/5fMsSyG15yi0SVDFgBxql+7gqm5nI4OmzyFelB3yH0Ub+eQnFr1vmDhCNGBz2ZiKGH/nCI4Pe09jOD71kVepFgppFQlz6FANrzepIp0WnbUNBlAwGqcTc1BMaqeijWV/+nsSeKFhPyLd65avvg3FJTrR9zisxyVnbiDYG0e9jJ6qmCk2aUs87GdCy14I2PBwaB843s+smlrQR4bYQaMzfXCSJmiDRKeQf1VRN+K5tDpCJyzh5/FD6HGfZSjwGwZ5UO90XiB9kk8hMQH5GGmEox9w6Yrn/6ttgMGmtB++74uyrkviRxbJhry0ZyBi6tba9xzXeDjMSWnzNchaWscbCBWf8Y6eF6ee4PkY4tQDM03BHHQBaDL58Vfdxy12kcS8Ut+SofGbD8j9Xv4Yqp+XcrIOWENnJyHycyH0VxT58VqR5s8UJ1Cux6oZloDFDBuBcE8WHkDyZH85WzQ0easCOJNbSUCSqzhimgqwVcrKaCcE5FDVaJI7gNIl7Mwwq1XGmqnvdpc4XV0dArBBnXclZNaBd2yH/2RDk5lSTvPIjWRgSWAqjLf5oZXk6u1tERRsicmyCtlbmCuZ4cHGQaqtP5mw+H/s+CAgMG3l1iyV7Vg0598RrKEcBXzR7ovMw1Wci9NMIm/zPcWQX8Q93Iqz4D BF4/t4I5 CWL0tUBDF/1jFVVuefnfm0s32E0T7K3iPzRli1k0zJTgNbO10wA+N3g6pCnTjw2Ljr2yWNyL8gmeiIBuZL3E9kna9a39rv7fc1fLc2zSJlfzEN0limmiuoDPFgTzMRvSJFIOGWBYiF9xmH9WVdNhxUnEY18J1fO3yRhiUOQp2+Vt4vcPCghUflaEeon1vsn/wOBQDo7HCJK5eTP/vv6pg9PIGfn9nxcxXviMXqBO9rFPKcRoMOEgOfX5rPu+75eYrEH+Q3GsV7c1uPViA5mt6QFlaViSmKz9bK7v/4s6jI/aCJp6M5NTT9LUJIaO/HhQ+BAcXENe2mZnsGVGLBiUUlMPx3OBkAtcH+X64tKCqIpSVS3LWvA+CN/m0+wj1wGhKfQ7xYSIf9f9Jra7ynwQKAe3nnN42bfghL09sZ010kpwn3fuQ1wERpfAEzVDuf8OkqA6lsiJ6bVJ+FVvSxUo4Sg3Ti+mIEABDF4ya 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: On Thu, Apr 13, 2023 at 10:28:40PM -0700, Luis Chamberlain wrote: > With this we run into 0 wasted virtual memory bytes. Avoid what duplicates?