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Code Issues Releases Activity

Detect hypervisors early. We used to set lower hz on hypervisors by default

Browse Source 
but it was broken since r273800 (and r278522, its MFC to stable/10) because
identify_cpu() is called too late, i.e., after init_param1().

MFC after:	3 days
This commit is contained in:
Jung-uk Kim 2017-08-05 06:56:46 +00:00
parent 11b5e0cd9c
commit 0105034487
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=322076
4 changed files with 6 additions and 2 deletions
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2
sys/amd64/amd64/machdep.c
View File

@ -1537,6 +1537,8 @@ hammer_time(u_int64_t modulep, u_int64_t physfree)
kmdp = init_ops.parse_preload_data(modulep);
identify_hypervisor();
/* Init basic tunables, hz etc */
init_param1();

2
sys/i386/i386/machdep.c
View File

@ -2185,6 +2185,8 @@ init386(int first)
else
init_static_kenv(NULL, 0);
identify_hypervisor();
/* Init basic tunables, hz etc */
init_param1();

1
sys/x86/include/x86_var.h
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@ -116,6 +116,7 @@ void cpu_setregs(void);
void dump_add_page(vm_paddr_t);
void dump_drop_page(vm_paddr_t);
void identify_cpu(void);
void identify_hypervisor(void);
void initializecpu(void);
void initializecpucache(void);
bool fix_cpuid(void);

3
sys/x86/x86/identcpu.c
View File

@ -1252,7 +1252,7 @@ static const char *const vm_pnames[] = {
NULL
};
static void
void
identify_hypervisor(void)
{
u_int regs[4];
@ -1403,7 +1403,6 @@ identify_cpu(void)
cpu_feature2 = regs[2];
#endif
identify_hypervisor();
cpu_vendor_id = find_cpu_vendor_id();
if (fix_cpuid()) {