提交 8e102301 编写于 作者: H Heiko Carstens 提交者: Martin Schwidefsky

[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: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
上级 19726cec
......@@ -46,8 +46,8 @@ static int show_cpuinfo(struct seq_file *m, void *v)
unsigned long n = (unsigned long) v - 1;
int i;
s390_adjust_jiffies();
if (!n) {
s390_adjust_jiffies();
seq_printf(m, "vendor_id : IBM/S390\n"
"# processors : %i\n"
"bogomips per cpu: %lu.%02lu\n",
......
......@@ -33,6 +33,7 @@ static void sclp_cpu_capability_notify(struct work_struct *work)
int cpu;
struct sys_device *sysdev;
s390_adjust_jiffies();
pr_warning("cpu capability changed.\n");
get_online_cpus();
for_each_online_cpu(cpu) {
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册