diff options
| author | Ingo Molnar <mingo@kernel.org> | 2012-10-30 08:33:01 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-10-30 08:33:01 +0100 |
| commit | 38ca9c927c7d3db61f57e3d3a9334958c3af6e9a (patch) | |
| tree | 58be18cf3dce7a407c84ab2532e92bdb8b7ee067 /include/linux/kvm_host.h | |
| parent | e9c84cb8d5f1b1ea6fcbe6190d51dc84b6975938 (diff) | |
| parent | 3e1df4f506836e6bea1ab61cf88c75c8b1840643 (diff) | |
Merge tag 'cputime-cleanups-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into sched/core
Pull cputime cleanups and optimizations from Frederic Weisbecker:
* Gather vtime headers that were a bit scattered around
* Separate irqtime and vtime namespaces that were
colliding, resulting in useless calls to irqtime accounting.
* Slightly optimize irq and guest vtime accounting.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/kvm_host.h')
| -rw-r--r-- | include/linux/kvm_host.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 93bfc9f9815c..0e2212fe4784 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -737,7 +737,11 @@ static inline int kvm_deassign_device(struct kvm *kvm, static inline void kvm_guest_enter(void) { BUG_ON(preemptible()); - vtime_account(current); + /* + * This is running in ioctl context so we can avoid + * the call to vtime_account() with its unnecessary idle check. + */ + vtime_account_system(current); current->flags |= PF_VCPU; /* KVM does not hold any references to rcu protected data when it * switches CPU into a guest mode. In fact switching to a guest mode @@ -751,7 +755,11 @@ static inline void kvm_guest_enter(void) static inline void kvm_guest_exit(void) { - vtime_account(current); + /* + * This is running in ioctl context so we can avoid + * the call to vtime_account() with its unnecessary idle check. + */ + vtime_account_system(current); current->flags &= ~PF_VCPU; } |