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| author | Jeremy Fitzhardinge <jeremy@xensource.com> | 2007-10-16 20:51:30 +0200 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-10-16 20:51:30 +0200 |
| commit | f0d733942750c1ee6358c3a4a1a5d7ba73b7122f (patch) | |
| tree | 32d0802b60078b6a2f43ce19d9019033ada6485d /arch/x86/xen/time.c | |
| parent | Clean up duplicate includes in arch/i386/xen/ (diff) | |
| download | linux-f0d733942750c1ee6358c3a4a1a5d7ba73b7122f.tar.xz linux-f0d733942750c1ee6358c3a4a1a5d7ba73b7122f.zip | |
xen: yield to IPI target if necessary
When sending a call-function IPI to a vcpu, yield if the vcpu isn't
running.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Diffstat (limited to 'arch/x86/xen/time.c')
| -rw-r--r-- | arch/x86/xen/time.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c index dfd6db69ead5..d083ff5ef088 100644 --- a/arch/x86/xen/time.c +++ b/arch/x86/xen/time.c @@ -105,6 +105,12 @@ static void get_runstate_snapshot(struct vcpu_runstate_info *res) } while (get64(&state->state_entry_time) != state_time); } +/* return true when a vcpu could run but has no real cpu to run on */ +bool xen_vcpu_stolen(int vcpu) +{ + return per_cpu(runstate, vcpu).state == RUNSTATE_runnable; +} + static void setup_runstate_info(int cpu) { struct vcpu_register_runstate_memory_area area; |