On Mon, Jan 28, 2013 at 10:51 PM, Sedat Dilek <[email protected]> wrote: > On Mon, Jan 28, 2013 at 8:04 PM, Frederic Weisbecker <[email protected]> > wrote: >> While remotely reading the cputime of a task running in a >> full dynticks CPU, the values stored in utime/stime fields >> of struct task_struct may be stale. Its values may be those >> of the last kernel <-> user transition time snapshot and >> we need to add the tickless time spent since this snapshot. >> >> To fix this, flush the cputime of the dynticks CPUs on >> kernel <-> user transition and record the time / context >> where we did this. Then on top of this snapshot and the current >> time, perform the fixup on the reader side from task_times() >> accessors. >> >> Signed-off-by: Frederic Weisbecker <[email protected]> >> Cc: Andrew Morton <[email protected]> >> Cc: Ingo Molnar <[email protected]> >> Cc: Li Zhong <[email protected]> >> Cc: Namhyung Kim <[email protected]> >> Cc: Paul E. McKenney <[email protected]> >> Cc: Paul Gortmaker <[email protected]> >> Cc: Peter Zijlstra <[email protected]> >> Cc: Steven Rostedt <[email protected]> >> Cc: Thomas Gleixner <[email protected]> >> [fixed kvm module related build errors] >> Signed-off-by: Sedat Dilek <[email protected]> >> > > Can you explain a bit what is the difference between "3.8-rc4-nohz3" > and "full-dynticks-cputime-for-mingo" patchsets? > > Does the latter need no more EXPORT_SYMBOL_GPL for vtime_guest_enter() > and vtime_guest_exit() when CONFIG_KVM=m (see [1])? > > - Sedat - > > [1] https://lkml.org/lkml/2013/1/23/473
To answer my question by myself... $ grep 'CONFIG_KVM=' linux/.config CONFIG_KVM=m $ grep kvm deb-pkg.log CC arch/x86/kernel/kvm.o CC arch/x86/kernel/kvmclock.o LD arch/x86/kvm/built-in.o CC [M] arch/x86/kvm/vmx.o CC [M] arch/x86/kvm/../../../virt/kvm/kvm_main.o CC [M] arch/x86/kvm/../../../virt/kvm/ioapic.o CC [M] arch/x86/kvm/../../../virt/kvm/coalesced_mmio.o CC [M] arch/x86/kvm/../../../virt/kvm/irq_comm.o CC [M] arch/x86/kvm/../../../virt/kvm/eventfd.o CC [M] arch/x86/kvm/../../../virt/kvm/assigned-dev.o CC [M] arch/x86/kvm/../../../virt/kvm/iommu.o CC [M] arch/x86/kvm/../../../virt/kvm/async_pf.o CC [M] arch/x86/kvm/x86.o CC [M] arch/x86/kvm/mmu.o CC [M] arch/x86/kvm/emulate.o CC [M] arch/x86/kvm/i8259.o CC [M] arch/x86/kvm/irq.o CC [M] arch/x86/kvm/lapic.o CC [M] arch/x86/kvm/i8254.o CC [M] arch/x86/kvm/cpuid.o CC [M] arch/x86/kvm/pmu.o LD [M] arch/x86/kvm/kvm.o LD [M] arch/x86/kvm/kvm-intel.o CC arch/x86/kvm/kvm-intel.mod.o CC arch/x86/kvm/kvm.mod.o LD [M] arch/x86/kvm/kvm-intel.ko LD [M] arch/x86/kvm/kvm.ko INSTALL arch/x86/kvm/kvm-intel.ko INSTALL arch/x86/kvm/kvm.ko ...both EXPORT_SYMBOL_GPLs are no more needed! - Sedat . -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
