fix meminfo output on consecutive calls

process/process_linux.go

@@ -188,11 +188,11 @@ func (p *Process) CPUAffinity() ([]int32, error) {
 	return nil, common.NotImplementedError
 }
 func (p *Process) MemoryInfo() (*MemoryInfoStat, error) {
-	_, _, err := p.fillFromStatm()
+	meminfo, _, err := p.fillFromStatm()
 	if err != nil {
 		return nil, err
 	}
-	return p.memInfo, nil
+	return meminfo, nil
 }
 func (p *Process) MemoryInfoEx() (*MemoryInfoExStat, error) {
 	_, memInfoEx, err := p.fillFromStatm()