[PATCH v2 1/6] KVM: selftests: memslot_perf_test: Use data->nslots in prepare_vm()

From: Gavin Shan
Date: Tue Oct 18 2022 - 00:05:32 EST


In prepare_vm(), 'data->nslots' is assigned with 'max_mem_slots - 1'
at the beginning, meaning they are interchangeable.

Use 'data->nslots' isntead of 'max_mem_slots - 1'. With this, it
becomes easier to move the logic of probing number of slots into
upper layer in subsequent patches.

No functional change intended.

Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
---
tools/testing/selftests/kvm/memslot_perf_test.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/kvm/memslot_perf_test.c b/tools/testing/selftests/kvm/memslot_perf_test.c
index 44995446d942..231cc8449c2e 100644
--- a/tools/testing/selftests/kvm/memslot_perf_test.c
+++ b/tools/testing/selftests/kvm/memslot_perf_test.c
@@ -280,14 +280,14 @@ static bool prepare_vm(struct vm_data *data, int nslots, uint64_t *maxslots,
ucall_init(data->vm, NULL);

pr_info_v("Adding slots 1..%i, each slot with %"PRIu64" pages + %"PRIu64" extra pages last\n",
- max_mem_slots - 1, data->pages_per_slot, rempages);
+ data->nslots, data->pages_per_slot, rempages);

clock_gettime(CLOCK_MONOTONIC, &tstart);
- for (slot = 1, guest_addr = MEM_GPA; slot < max_mem_slots; slot++) {
+ for (slot = 1, guest_addr = MEM_GPA; slot <= data->nslots; slot++) {
uint64_t npages;

npages = data->pages_per_slot;
- if (slot == max_mem_slots - 1)
+ if (slot == data->nslots)
npages += rempages;

vm_userspace_mem_region_add(data->vm, VM_MEM_SRC_ANONYMOUS,
@@ -297,12 +297,12 @@ static bool prepare_vm(struct vm_data *data, int nslots, uint64_t *maxslots,
}
*slot_runtime = timespec_elapsed(tstart);

- for (slot = 0, guest_addr = MEM_GPA; slot < max_mem_slots - 1; slot++) {
+ for (slot = 0, guest_addr = MEM_GPA; slot < data->nslots; slot++) {
uint64_t npages;
uint64_t gpa;

npages = data->pages_per_slot;
- if (slot == max_mem_slots - 2)
+ if (slot == data->nslots - 1)
npages += rempages;

gpa = vm_phy_pages_alloc(data->vm, npages, guest_addr,
--
2.23.0