Add a field to count how many remote faults one vCPU has taken. So far
it's still not used, but will be soon.
Signed-off-by: Peter Xu <pet...@redhat.com>
---
migration/postcopy-ram.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
index 5cbc7aa77e..46a8fdb6c2 100644
--- a/migration/postcopy-ram.c
+++ b/migration/postcopy-ram.c
@@ -116,6 +116,8 @@ typedef struct PostcopyBlocktimeContext {
uint64_t *vcpu_blocktime_start;
/* blocktime per vCPU */
uint64_t *vcpu_blocktime_total;
+ /* count of faults per vCPU */
+ uint64_t *vcpu_faults_count;
/* page address per vCPU */
uintptr_t *vcpu_addr;
/* total blocktime when all vCPUs are stopped */
@@ -136,6 +138,7 @@ static void destroy_blocktime_context(struct
PostcopyBlocktimeContext *ctx)
{
g_free(ctx->vcpu_blocktime_start);
g_free(ctx->vcpu_blocktime_total);
+ g_free(ctx->vcpu_faults_count);
g_free(ctx->vcpu_addr);
g_free(ctx);
}
@@ -155,6 +158,7 @@ static struct PostcopyBlocktimeContext
*blocktime_context_new(void)
ctx->vcpu_blocktime_start = g_new0(uint64_t, smp_cpus);
ctx->vcpu_blocktime_total = g_new0(uint64_t, smp_cpus);
+ ctx->vcpu_faults_count = g_new0(uint64_t, smp_cpus);
ctx->vcpu_addr = g_new0(uintptr_t, smp_cpus);
ctx->exit_notifier.notify = migration_exit_cb;
qemu_add_exit_notifier(&ctx->exit_notifier);
@@ -855,6 +859,7 @@ void mark_postcopy_blocktime_begin(uintptr_t addr, uint32_t
ptid,
dc->last_begin = current_us;
dc->vcpu_blocktime_start[cpu] = current_us;
dc->vcpu_addr[cpu] = addr;
+ dc->vcpu_faults_count[cpu]++;
/*
* The caller should only inject a blocktime entry when the page is
--
2.49.0
