search for: pvclock

If the guest domain has been suspend/resumed or migrated, then the system clock backing the pvclock clocksource may revert to a smaller value (ie, can be non-monotonic across the migration/save-restore). Make sure we zero last_value in that case so that the domain continues to see clock updates. [ I don't know if kvm needs an analogous fix or not. ] Signed-off-by: Jeremy Fitzhardinge <je...

If the guest domain has been suspend/resumed or migrated, then the system clock backing the pvclock clocksource may revert to a smaller value (ie, can be non-monotonic across the migration/save-restore). Make sure we zero last_value in that case so that the domain continues to see clock updates. [ I don't know if kvm needs an analogous fix or not. ] Signed-off-by: Jeremy Fitzhardinge <je...

If the guest domain has been suspend/resumed or migrated, then the system clock backing the pvclock clocksource may revert to a smaller value (ie, can be non-monotonic across the migration/save-restore). Make sure we zero last_value in that case so that the domain continues to see clock updates. [ I don't know if kvm needs an analogous fix or not. ] Signed-off-by: Jeremy Fitzhardinge <je...

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 <yamah...

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 <yamah...

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 <yamah...

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 for kvm that makes use of it. Turns out that only implementing a pv get_tsc_khz is not...

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 for kvm that makes use of it. Turns out that only implementing a pv get_tsc_khz is not...

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-a...

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-a...

Create include/asm-ia64/pvclock-abi.h to compile which includes include/asm-x86/pvclock-abi.h because ia64/xen uses same struture. Hopefully include/asm-x86/pvclock-abi.h would be moved to somewhere more generic. Signed-off-by: Isaku Yamahata <yamahata at valinux.co.jp> --- include/asm-ia64/pvclock-abi.h | 5 +++++ 1 f...

Create include/asm-ia64/pvclock-abi.h to compile which includes 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. Signed-off-by: Isaku Yamahata <yamahata at valinux.co.jp> --- include/asm-ia64/pvclock-abi.h | 5 +++++ 1...

Create include/asm-ia64/pvclock-abi.h to compile which includes include/asm-x86/pvclock-abi.h because ia64/xen uses same struture. Hopefully include/asm-x86/pvclock-abi.h would be moved to somewhere more generic. Signed-off-by: Isaku Yamahata <yamahata at valinux.co.jp> --- include/asm-ia64/pvclock-abi.h | 5 +++++ 1 f...

Create include/asm-ia64/pvclock-abi.h to compile which includes 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. Signed-off-by: Isaku Yamahata <yamahata at valinux.co.jp> --- include/asm-ia64/pvclock-abi.h | 5 +++++ 1...

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

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...

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...

...he 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 thing is done. > > tglx IMO Hyper-V TSC page clocksource here seems pretty similar to KVM's pvclock, So I would guess "the structure is only updated just before reentering the guest after some VM event" (https://rwmj.wordpress.com/2010/10/15/kvm-pvclock/), that is, the update should happen on the same CPU, I guess. Thanks, -- Dexuan

...he 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 thing is done. > > tglx IMO Hyper-V TSC page clocksource here seems pretty similar to KVM's pvclock, So I would guess "the structure is only updated just before reentering the guest after some VM event" (https://rwmj.wordpress.com/2010/10/15/kvm-pvclock/), that is, the update should happen on the same CPU, I guess. Thanks, -- Dexuan