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sysctl: mark more nodes as MPSAFE

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vm.kvm_size and vm.kvm_free are read only and marked as MPSAFE on i386
already. Mark them as that on amd64 and arm64 too to avoid locking Giant.

Reviewed by:	kib (mentor)
Approved by:	kib (mentor)
Differential Revision:	https://reviews.freebsd.org/D23039
This commit is contained in:
Pawel Biernacki 2020-01-06 10:52:13 +00:00
parent 6c110e8611
commit a1d7296784
2 changed files with 12 additions and 8 deletions
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10
sys/amd64/amd64/pmap.c
View File

@ -4072,8 +4072,9 @@ kvm_size(SYSCTL_HANDLER_ARGS)
return sysctl_handle_long(oidp, &ksize, 0, req);
}
SYSCTL_PROC(_vm, OID_AUTO, kvm_size, CTLTYPE_LONG|CTLFLAG_RD,
0, 0, kvm_size, "LU", "Size of KVM");
SYSCTL_PROC(_vm, OID_AUTO, kvm_size, CTLTYPE_LONG | CTLFLAG_RD | CTLFLAG_MPSAFE,
0, 0, kvm_size, "LU",
"Size of KVM");
static int
kvm_free(SYSCTL_HANDLER_ARGS)
@ -4082,8 +4083,9 @@ kvm_free(SYSCTL_HANDLER_ARGS)
return sysctl_handle_long(oidp, &kfree, 0, req);
}
SYSCTL_PROC(_vm, OID_AUTO, kvm_free, CTLTYPE_LONG|CTLFLAG_RD,
0, 0, kvm_free, "LU", "Amount of KVM free");
SYSCTL_PROC(_vm, OID_AUTO, kvm_free, CTLTYPE_LONG | CTLFLAG_RD | CTLFLAG_MPSAFE,
0, 0, kvm_free, "LU",
"Amount of KVM free");
/*
* Allocate physical memory for the vm_page array and map it into KVA,

10
sys/arm64/arm64/pmap.c
View File

@ -1845,8 +1845,9 @@ kvm_size(SYSCTL_HANDLER_ARGS)
return sysctl_handle_long(oidp, &ksize, 0, req);
}
SYSCTL_PROC(_vm, OID_AUTO, kvm_size, CTLTYPE_LONG|CTLFLAG_RD,
0, 0, kvm_size, "LU", "Size of KVM");
SYSCTL_PROC(_vm, OID_AUTO, kvm_size, CTLTYPE_LONG | CTLFLAG_RD | CTLFLAG_MPSAFE,
0, 0, kvm_size, "LU",
"Size of KVM");
static int
kvm_free(SYSCTL_HANDLER_ARGS)
@ -1855,8 +1856,9 @@ kvm_free(SYSCTL_HANDLER_ARGS)
return sysctl_handle_long(oidp, &kfree, 0, req);
}
SYSCTL_PROC(_vm, OID_AUTO, kvm_free, CTLTYPE_LONG|CTLFLAG_RD,
0, 0, kvm_free, "LU", "Amount of KVM free");
SYSCTL_PROC(_vm, OID_AUTO, kvm_free, CTLTYPE_LONG | CTLFLAG_RD | CTLFLAG_MPSAFE,
0, 0, kvm_free, "LU",
"Amount of KVM free");
/*
* grow the number of kernel page table entries, if needed