diff options
author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2011-01-05 06:48:18 -0500 |
---|---|---|
committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2011-01-05 06:47:32 -0500 |
commit | 8e1023016cf17152972b98bce6c144834a4916d5 (patch) | |
tree | b53d3e5a089fa96d837c6004262c2c24f9580523 | |
parent | 19726cec63aeadad127f9e72ee69240336e37f15 (diff) |
[S390] prevent unneccesary loops_per_jiffy recalculation
When the seqfile /proc/cpuinfo gets accesses for each possible cpu
loops_per_jiffy gets recalculated. However its value is only needed
on first access.
In addition loops_per_jiffy should be recalculated when the machine
reports a capability change.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r-- | arch/s390/kernel/processor.c | 2 | ||||
-rw-r--r-- | drivers/s390/char/sclp_config.c | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c index 753623bde8ec..311e9d712888 100644 --- a/arch/s390/kernel/processor.c +++ b/arch/s390/kernel/processor.c | |||
@@ -46,8 +46,8 @@ static int show_cpuinfo(struct seq_file *m, void *v) | |||
46 | unsigned long n = (unsigned long) v - 1; | 46 | unsigned long n = (unsigned long) v - 1; |
47 | int i; | 47 | int i; |
48 | 48 | ||
49 | s390_adjust_jiffies(); | ||
50 | if (!n) { | 49 | if (!n) { |
50 | s390_adjust_jiffies(); | ||
51 | seq_printf(m, "vendor_id : IBM/S390\n" | 51 | seq_printf(m, "vendor_id : IBM/S390\n" |
52 | "# processors : %i\n" | 52 | "# processors : %i\n" |
53 | "bogomips per cpu: %lu.%02lu\n", | 53 | "bogomips per cpu: %lu.%02lu\n", |
diff --git a/drivers/s390/char/sclp_config.c b/drivers/s390/char/sclp_config.c index b497afe061cc..16e232a99fb7 100644 --- a/drivers/s390/char/sclp_config.c +++ b/drivers/s390/char/sclp_config.c | |||
@@ -33,6 +33,7 @@ static void sclp_cpu_capability_notify(struct work_struct *work) | |||
33 | int cpu; | 33 | int cpu; |
34 | struct sys_device *sysdev; | 34 | struct sys_device *sysdev; |
35 | 35 | ||
36 | s390_adjust_jiffies(); | ||
36 | pr_warning("cpu capability changed.\n"); | 37 | pr_warning("cpu capability changed.\n"); |
37 | get_online_cpus(); | 38 | get_online_cpus(); |
38 | for_each_online_cpu(cpu) { | 39 | for_each_online_cpu(cpu) { |