Pull virt-cpu-accounting into release branch

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 8fa3faf5ef1b..eef457fda08f 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -283,6 +283,17 @@ config FORCE_MAX_ZONEORDER
         default "17" if HUGETLB_PAGE
         default "11"
 
+config VIRT_CPU_ACCOUNTING
+        bool "Deterministic task and CPU time accounting"
+        default n
+        help
+          Select this option to enable more accurate task and CPU time
+          accounting.  This is done by reading a CPU counter on each
+          kernel entry and exit and on transitions within the kernel
+          between system, softirq and hardirq state, so there is a
+          small performance impact.
+          If in doubt, say N here.
+
 config SMP
         bool "Symmetric multi-processing support"
         help