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kvm: do not account temporary allocations to kmem

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Some allocations done by KVM are temporary, they are created as result
of program actions, but can't exists for arbitrary long times.

They should have been GFP_TEMPORARY (rip!).

OTOH, kvm-nx-lpage-recovery and kvm-pit kernel threads exist for as long
as VM exists but their task_struct memory is not accounted.
This is story for another day.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Message-ID: <c0122f66-f428-417e-a360-b25fc0f154a0@p183>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Alexey Dobriyan 2024-06-10 13:31:21 +03:00 committed by Paolo Bonzini
parent b018589013
commit f474092c6f
1 changed files with 5 additions and 6 deletions
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11
virt/kvm/kvm_main.c
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@ -4427,7 +4427,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
struct kvm_regs *kvm_regs;
r = -ENOMEM;
kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL_ACCOUNT);
kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL);
if (!kvm_regs)
goto out;
r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs);
@ -4454,8 +4454,7 @@ out_free1:
break;
}
case KVM_GET_SREGS: {
kvm_sregs = kzalloc(sizeof(struct kvm_sregs),
GFP_KERNEL_ACCOUNT);
kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL);
r = -ENOMEM;
if (!kvm_sregs)
goto out;
@ -4547,7 +4546,7 @@ out_free1:
break;
}
case KVM_GET_FPU: {
fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL_ACCOUNT);
fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL);
r = -ENOMEM;
if (!fpu)
goto out;
@ -6210,7 +6209,7 @@ static void kvm_uevent_notify_change(unsigned int type, struct kvm *kvm)
active = kvm_active_vms;
mutex_unlock(&kvm_lock);
env = kzalloc(sizeof(*env), GFP_KERNEL_ACCOUNT);
env = kzalloc(sizeof(*env), GFP_KERNEL);
if (!env)
return;
@ -6226,7 +6225,7 @@ static void kvm_uevent_notify_change(unsigned int type, struct kvm *kvm)
add_uevent_var(env, "PID=%d", kvm->userspace_pid);
if (!IS_ERR(kvm->debugfs_dentry)) {
char *tmp, *p = kmalloc(PATH_MAX, GFP_KERNEL_ACCOUNT);
char *tmp, *p = kmalloc(PATH_MAX, GFP_KERNEL);
if (p) {
tmp = dentry_path_raw(kvm->debugfs_dentry, p, PATH_MAX);