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=-1.6 required=3.0 tests=DATE_IN_PAST_24_48, DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 3012BC7618B for ; Fri, 26 Jul 2019 07:30:01 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 F10AF206BF for ; Fri, 26 Jul 2019 07:30:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="hrAunhAU" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F10AF206BF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:36998 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqufv-0001K2-F3 for qemu-devel@archiver.kernel.org; Fri, 26 Jul 2019 03:29:59 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37503) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqufZ-0000dC-4P for qemu-devel@nongnu.org; Fri, 26 Jul 2019 03:29:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hqufX-00052H-0P for qemu-devel@nongnu.org; Fri, 26 Jul 2019 03:29:36 -0400 Received: from bilbo.ozlabs.org ([2401:3900:2:1::2]:55811 helo=ozlabs.org) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hqufV-0004Yh-ME; Fri, 26 Jul 2019 03:29:34 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 45w11J357zz9sML; Fri, 26 Jul 2019 17:29:24 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1564126164; bh=T/CkzG/oEzmOdi0Gilq1YYB3wbtv+ndFQICGPFn8GGI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hrAunhAUoFuQ7vKiQSRrCkUSnU6WE11k8U6591+OcA1naPk/u1UtO+wrGzCCp890k uO4tTxB4qXppziSLcFP9HvG2YN2jDKdYejZYbElmvjeKPR6V4B2FwdNAhFb33+lN3F fC8nZDj/PxQizCfG78PrvqGC2UFa+nxbrviyGlGc= Date: Thu, 25 Jul 2019 13:38:53 +1000 From: David Gibson To: Greg Kurz Message-ID: <20190725033853.GE28601@umbus> References: <156398742921.546975.8822387598242513827.stgit@bahia.lan> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="3O1VwFp74L81IIeR" Content-Disposition: inline In-Reply-To: <156398742921.546975.8822387598242513827.stgit@bahia.lan> User-Agent: Mutt/1.12.0 (2019-05-25) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2401:3900:2:1::2 Subject: Re: [Qemu-devel] [PATCH for-4.1 0/2] spapr/xics: Last minute fixes X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-ppc@nongnu.org, =?iso-8859-1?Q?C=E9dric?= Le Goater , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --3O1VwFp74L81IIeR Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jul 24, 2019 at 06:57:09PM +0200, Greg Kurz wrote: > KVM on POWER9 doesn't use the XIVE VP space optimally. This currently > limits the number of VMs we can start to 127. Starting with the 128th > one, KVM fails to create the XIVE or the XICS-on-XIVE device and we > go through the fallback paths in QEMU. >=20 > The XICS error path still has an issue that prevents the guest to do > interrupts, even after QEMU fell back on XICS emulation. This is > fixed with patch 2. >=20 > Patch 1 is just a _trivial_ improvement of the warning that gets > emited when falling back to emulated IC. Feel free to apply it to > 4.2 or even to drop it if you don't want it in 4.1. Applied to ppc-for-4.1. Finding a time to do a PR will be interesting, but I'll see what I can do --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. 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