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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A3F4DC001B0 for ; Thu, 29 Jun 2023 13:10:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=iibmThHDbDE3iFrM/tba8xvzBJgGsn1tC0EOba0w+no=; b=sYNPj9h1DiQ6mW 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(Postfix) with ESMTPSA id 15EA33F73F; Thu, 29 Jun 2023 06:09:54 -0700 (PDT) Message-ID: <6e6ff430-2c97-5c6f-26a4-e4b809375033@arm.com> Date: Thu, 29 Jun 2023 14:09:47 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 Subject: Re: Slowdown copying data between kernel versions 4.19 and 5.15 Content-Language: en-GB To: "Havens, Austin" , "catalin.marinas@arm.com" , "will@kernel.org" , "michal.simek@amd.com" Cc: "Suresh, Siddarth" , "Lui, Vincent" , "linux-arm-kernel@lists.infradead.org" References: From: Robin Murphy In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230629_061001_114650_565F5398 X-CRM114-Status: GOOD ( 31.49 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; 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