From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Graf Subject: Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks Date: Thu, 12 Jul 2012 00:35:56 +0200 Message-ID: References: <1340627195-11544-1-git-send-email-mihai.caraman@freescale.com> <1340627195-11544-13-git-send-email-mihai.caraman@freescale.com> <1B2CBB56-7180-4A73-8E51-6538A725F710@suse.de> <1341440735.16808.42.camel@pasglop> <300B73AA675FCE4A93EB4FC1D42459FF15CDE6@039-SN2MPN1-013.039d.mgd.msft.net> , <7305F50A-8E77-4E88-8EB8-4046A7E94DF9@suse.de> <300B73AA675FCE4A93EB4FC1D42459FF15CF83@039-SN2MPN1-013.039d.mgd.msft.net> <1342045680.18850.39.camel@pasglop> Mime-Version: 1.0 (Apple Message framework v1278) Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: "qemu-ppc@nongnu.org List" , Caraman Mihai Claudiu-B02008 , linuxppc-dev , KVM list , "" To: Benjamin Herrenschmidt Return-path: In-Reply-To: <1342045680.18850.39.camel@pasglop> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+glppe-linuxppc-embedded-2=m.gmane.org@lists.ozlabs.org Sender: "Linuxppc-dev" List-Id: kvm.vger.kernel.org On 12.07.2012, at 00:28, Benjamin Herrenschmidt wrote: > On Thu, 2012-07-12 at 00:25 +0200, Alexander Graf wrote: >> Or just free up another register early on, like here. > > If you're going to do that, you want to measure the impact on null > syscall performance though. That should hold true for any change in that code, no? Alex From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Graf Date: Wed, 11 Jul 2012 22:35:56 +0000 Subject: Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks Message-Id: List-Id: References: <1340627195-11544-1-git-send-email-mihai.caraman@freescale.com> <1340627195-11544-13-git-send-email-mihai.caraman@freescale.com> <1B2CBB56-7180-4A73-8E51-6538A725F710@suse.de> <1341440735.16808.42.camel@pasglop> <300B73AA675FCE4A93EB4FC1D42459FF15CDE6@039-SN2MPN1-013.039d.mgd.msft.net> , <7305F50A-8E77-4E88-8EB8-4046A7E94DF9@suse.de> <300B73AA675FCE4A93EB4FC1D42459FF15CF83@039-SN2MPN1-013.039d.mgd.msft.net> <1342045680.18850.39.camel@pasglop> In-Reply-To: <1342045680.18850.39.camel@pasglop> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Benjamin Herrenschmidt Cc: "qemu-ppc@nongnu.org List" , Caraman Mihai Claudiu-B02008 , linuxppc-dev , KVM list , "" On 12.07.2012, at 00:28, Benjamin Herrenschmidt wrote: > On Thu, 2012-07-12 at 00:25 +0200, Alexander Graf wrote: >> Or just free up another register early on, like here. > > If you're going to do that, you want to measure the impact on null > syscall performance though. That should hold true for any change in that code, no? Alex