Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752964AbaACPux (ORCPT ); Fri, 3 Jan 2014 10:50:53 -0500 Received: from smtp.citrix.com ([66.165.176.89]:37804 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752436AbaACPuv (ORCPT ); Fri, 3 Jan 2014 10:50:51 -0500 X-IronPort-AV: E=Sophos;i="4.95,598,1384300800"; d="scan'208";a="89571484" Date: Fri, 3 Jan 2014 15:50:02 +0000 From: Stefano Stabellini X-X-Sender: sstabellini@kaball.uk.xensource.com To: David Vrabel CC: Konrad Rzeszutek Wilk , , , , , Subject: Re: [PATCH v12 06/18] xen/pvh: MMU changes for PVH (v2) In-Reply-To: <52C54C82.5010802@citrix.com> Message-ID: References: <1388550945-25499-1-git-send-email-konrad.wilk@oracle.com> <1388550945-25499-7-git-send-email-konrad.wilk@oracle.com> <52C54C82.5010802@citrix.com> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" X-DLP: MIA1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 999 Lines: 25 On Thu, 2 Jan 2014, David Vrabel wrote: > On 01/01/14 04:35, Konrad Rzeszutek Wilk wrote: > > From: Mukesh Rathor > > > > .. which are surprinsingly small compared to the amount for PV code. > > > > PVH uses mostly native mmu ops, we leave the generic (native_*) for > > the majority and just overwrite the baremetal with the ones we need. > > > > We also optimize one - the TLB flush. The native operation would > > needlessly IPI offline VCPUs causing extra wakeups. Using the > > Xen one avoids that and lets the hypervisor determine which > > VCPU needs the TLB flush. > > This TLB flush optimization should be a separate patch. Right. Aside from this: Acked-by: Stefano Stabellini -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/