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authorIngo Molnar <mingo@kernel.org>2013-08-14 17:58:56 +0200
committerIngo Molnar <mingo@kernel.org>2013-08-14 17:58:56 +0200
commit6f1d657668ac3041b65265d3653d7e9172a0d603 (patch)
tree6e837c683783708637cc4caf9de759166c7469b7 /arch/s390
parentd4e4ab86bcba5a72779c43dc1459f71fea3d89c8 (diff)
parentd13508f9440e46dccac6a2dd48d51a73b2207482 (diff)
downloadlinux-6f1d657668ac3041b65265d3653d7e9172a0d603.tar.bz2
Merge branch 'timers/nohz-v3' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/nohz
Pull nohz improvements from Frederic Weisbecker: " It mostly contains fixes and full dynticks off-case optimizations. I believe that distros want to enable this feature so it seems important to optimize the case where the "nohz_full=" parameter is empty. ie: I'm trying to remove any performance regression that comes with NO_HZ_FULL=y when the feature is not used. This patchset improves the current situation a lot (off-case appears to be around 11% faster with hackbench, although I guess it may vary depending on the configuration but it should be significantly faster in any case) now there is still some work to do: I can still observe a remaining loss of 1.6% throughput seen with hackbench compared to CONFIG_NO_HZ_FULL=n. " Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/include/asm/cputime.h3
-rw-r--r--arch/s390/include/asm/vtime.h7
-rw-r--r--arch/s390/kernel/vtime.c1
3 files changed, 8 insertions, 3 deletions
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h
index d2ff41370c0c..f65bd3634519 100644
--- a/arch/s390/include/asm/cputime.h
+++ b/arch/s390/include/asm/cputime.h
@@ -13,9 +13,6 @@
#include <asm/div64.h>
-#define __ARCH_HAS_VTIME_ACCOUNT
-#define __ARCH_HAS_VTIME_TASK_SWITCH
-
/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
typedef unsigned long long __nocast cputime_t;
diff --git a/arch/s390/include/asm/vtime.h b/arch/s390/include/asm/vtime.h
new file mode 100644
index 000000000000..af9896c53eb3
--- /dev/null
+++ b/arch/s390/include/asm/vtime.h
@@ -0,0 +1,7 @@
+#ifndef _S390_VTIME_H
+#define _S390_VTIME_H
+
+#define __ARCH_HAS_VTIME_ACCOUNT
+#define __ARCH_HAS_VTIME_TASK_SWITCH
+
+#endif /* _S390_VTIME_H */
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 9b9c1b78ec67..abcfab55f99b 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -19,6 +19,7 @@
#include <asm/irq_regs.h>
#include <asm/cputime.h>
#include <asm/vtimer.h>
+#include <asm/vtime.h>
#include <asm/irq.h>
#include "entry.h"