similar to: [PATCH] x86/pvclock-xen: zero last_value on resume

Hey, Over the last weeks, there has been some discussion regarding paravirt lpj calculation for kvm. Here's my shot at that. KVM hypervisor already put the right value in our pvclock structures, as part of the xen compatibility efforts. So the first patch moves the respective xen code to pvclock.c (since we'll be doing the same calculation anyway), while the second, implements functions

Hey, Over the last weeks, there has been some discussion regarding paravirt lpj calculation for kvm. Here's my shot at that. KVM hypervisor already put the right value in our pvclock structures, as part of the xen compatibility efforts. So the first patch moves the respective xen code to pvclock.c (since we'll be doing the same calculation anyway), while the second, implements functions

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. Some minor tweaks after super-fast review by Jeremy. The queue is on top of the kvm git tree. The first two patches should have no kvm dependencies and should apply to linus tree just fine. cheers, Gerd

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. Some minor tweaks after super-fast review by Jeremy. The queue is on top of the kvm git tree. The first two patches should have no kvm dependencies and should apply to linus tree just fine. cheers, Gerd

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. cheers, Gerd

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. cheers, Gerd

Create include/asm-ia64/pvclock-abi.h to compile which contains the same definitions of include/asm-x86/pvclock-abi.h because ia64/xen uses same structure. Hopefully include/asm-x86/pvclock-abi.h would be moved to somewhere more generic. Another approach is to include include/asm-x86/pvclock-abi.h from include/asm-ia64/pvclock-abi.h. But this would break if x86 header files are moved under

Create include/asm-ia64/pvclock-abi.h to compile which contains the same definitions of include/asm-x86/pvclock-abi.h because ia64/xen uses same structure. Hopefully include/asm-x86/pvclock-abi.h would be moved to somewhere more generic. Another approach is to include include/asm-x86/pvclock-abi.h from include/asm-ia64/pvclock-abi.h. But this would break if x86 header files are moved under

don't include asm/pvclock-abi.h directly, but asm/xen/pvclock-abi.h At this moment linux ia64 won't accept asm/pvclock-abi.h because there's no user of it. Instead make it include asm/xen/pvclock-abi.h and create asm-x86/xen/pvclock-abi.h which includes asm-x86/pvclock-abi.h. Signed-off-by: Isaku Yamahata <yamahata at valinux.co.jp> --- include/asm-x86/xen/pvclock-abi.h | 6

don't include asm/pvclock-abi.h directly, but asm/xen/pvclock-abi.h At this moment linux ia64 won't accept asm/pvclock-abi.h because there's no user of it. Instead make it include asm/xen/pvclock-abi.h and create asm-x86/xen/pvclock-abi.h which includes asm-x86/pvclock-abi.h. Signed-off-by: Isaku Yamahata <yamahata at valinux.co.jp> --- include/asm-x86/xen/pvclock-abi.h | 6

don't include asm/pvclock-abi.h directly, but asm/xen/pvclock-abi.h At this moment linux ia64 won't accept asm/pvclock-abi.h because there's no user of it. Instead make it include asm/xen/pvclock-abi.h and create asm-x86/xen/pvclock-abi.h which includes asm-x86/pvclock-abi.h. Signed-off-by: Isaku Yamahata <yamahata at valinux.co.jp> --- include/asm-x86/xen/pvclock-abi.h | 6

Dereferencing gtod->cycle_last all over the place and foing the cycles < last comparison in the vclock read functions generates horrible code. Doing it at the call site is much better and gains a few cycles both for TSC and pvclock. Caveat: This adds the comparison to the hyperv vclock as well, but I have no way to test that. Signed-off-by: Thomas Gleixner <tglx at linutronix.de> ---

> From: Thomas Gleixner [mailto:tglx at linutronix.de] > Sent: Saturday, February 11, 2017 02:02 > ... > That's important if the stuff happens cross CPU. If the update happens on > the same CPU then this is a different story and as there are VMexits > involved they might provide the required ordering already. But I can't tell > as I have no idea how that host side

> From: Thomas Gleixner [mailto:tglx at linutronix.de] > Sent: Saturday, February 11, 2017 02:02 > ... > That's important if the stuff happens cross CPU. If the update happens on > the same CPU then this is a different story and as there are VMexits > involved they might provide the required ordering already. But I can't tell > as I have no idea how that host side

On Tue, Oct 09, 2018 at 01:09:42PM -0700, Andy Lutomirski wrote: > On Tue, Oct 9, 2018 at 8:28 AM Marcelo Tosatti <mtosatti at redhat.com> wrote: > > > > On Mon, Oct 08, 2018 at 10:38:22AM -0700, Andy Lutomirski wrote: > > > On Mon, Oct 8, 2018 at 8:27 AM Marcelo Tosatti <mtosatti at redhat.com> wrote: > > > > I read the comment three more times and

On Tue, Oct 09, 2018 at 01:09:42PM -0700, Andy Lutomirski wrote: > On Tue, Oct 9, 2018 at 8:28 AM Marcelo Tosatti <mtosatti at redhat.com> wrote: > > > > On Mon, Oct 08, 2018 at 10:38:22AM -0700, Andy Lutomirski wrote: > > > On Mon, Oct 8, 2018 at 8:27 AM Marcelo Tosatti <mtosatti at redhat.com> wrote: > > > > I read the comment three more times and

Respin of the paravirt clock patch series. On the host side the kvm paravirt clock is made compatible with the xen clock. On the guest side some xen code has been factored out into a separate source file shared by both kvm and xen clock implementations. This time it should work ok for kvm smp guests ;) cheers, Gerd

Respin of the paravirt clock patch series. On the host side the kvm paravirt clock is made compatible with the xen clock. On the guest side some xen code has been factored out into a separate source file shared by both kvm and xen clock implementations. This time it should work ok for kvm smp guests ;) cheers, Gerd

paravirt clock source patches, next round, with a bunch of changes in the host code according to Avi's review comments and some minor code tweaks. cheers, Gerd

paravirt clock source patches, next round, with a bunch of changes in the host code according to Avi's review comments and some minor code tweaks. cheers, Gerd