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 X-Spam-Level: X-Spam-Status: No, score=-5.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4210C3A5A4 for ; Tue, 27 Aug 2019 00:34:39 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 49496206BB for ; Tue, 27 Aug 2019 00:34:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=ozlabs.org header.i=@ozlabs.org header.b="tySe8v7x" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 49496206BB Authentication-Results: mail.kernel.org; dmarc=pass (p=none dis=none) header.from=ozlabs.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 46HVHx0nvjzDqWh for ; Tue, 27 Aug 2019 10:34:37 +1000 (AEST) Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 46HVFQ1VpdzDqNB for ; Tue, 27 Aug 2019 10:32:26 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=ozlabs.org header.i=@ozlabs.org header.b="tySe8v7x"; dkim-atps=neutral Received: by ozlabs.org (Postfix, from userid 1003) id 46HVFP6JL1z9sDB; Tue, 27 Aug 2019 10:32:25 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ozlabs.org; s=201707; t=1566865945; bh=n0WxmvwSK65oIhBS+QjYk4vyDjy+iy/5wXOF3pY69BE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=tySe8v7xb2A12sBylV8i+NhlV0mc10CpEDBz0n7H/JCr3kE9j08T0vStfZB5ufA7l TH/4ypJDcenroG30bKoL/y8GWQa8dt1j6LtPQB+my1R880OLAdipZCryf7aF3Ms4qE T3jVD07yBHleSv2v8cQk31filyT+jRNKK81E8o1427a71xtyoJHzO/WVNX5JJ0Ix66 nrKpJi4mX/IvmFI/Ix48hY43BIQ6aHzAhQwkxfemOKLCG9l3OeuQtHwomOZCJxTf7v TqyoFpRYKQWORL21E2Cz5r8He3OvZ7sy0dS7qk0X2zchu8UyBOFwj2T9nlHaqouE0C 0ynQ2eD0KPNvQ== Date: Tue, 27 Aug 2019 10:32:20 +1000 From: Paul Mackerras To: Alexey Kardashevskiy Subject: Re: [PATCH kernel v2 2/4] KVM: PPC: Invalidate multiple TCEs at once Message-ID: <20190827003220.GA16075@blackberry> References: <20190826061705.92048-1-aik@ozlabs.ru> <20190826061705.92048-3-aik@ozlabs.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190826061705.92048-3-aik@ozlabs.ru> User-Agent: Mutt/1.5.24 (2015-08-30) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, Alistair Popple , kvm-ppc@vger.kernel.org, Alex Williamson , linuxppc-dev@lists.ozlabs.org, David Gibson Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Mon, Aug 26, 2019 at 04:17:03PM +1000, Alexey Kardashevskiy wrote: > Invalidating a TCE cache entry for each updated TCE is quite expensive. > This makes use of the new iommu_table_ops::xchg_no_kill()/tce_kill() > callbacks to bring down the time spent in mapping a huge guest DMA window; > roughly 20s to 10s for each guest's 100GB of DMA space. > > Signed-off-by: Alexey Kardashevskiy With the addition of "Book3S" to the patch title, Acked-by: Paul Mackerras