Merge pull request #1769 from zmyzheng/zmyzheng/support-process-page-faults-windows

feat(process_windows): Support collecting PageFault count in Windows

README.md

@@ -260,7 +260,7 @@ Some code is ported from Ohai. Many thanks.
 |children            |x      |x        |x        |x      |x        |
 |connections         |x      |         |x        |x      |         |
 |is\_running         |       |         |         |       |         |
-|page\_faults        |x      |         |         |       |         |
+|page\_faults        |x      |         |         |       |x        |
 
 ### gopsutil Original Metrics
 

process/process_windows.go

@@ -652,7 +652,17 @@ func (p *Process) MemoryInfoExWithContext(ctx context.Context) (*MemoryInfoExSta
 }
 
 func (p *Process) PageFaultsWithContext(ctx context.Context) (*PageFaultsStat, error) {
-	return nil, common.ErrNotImplementedError
+	mem, err := getMemoryInfo(p.Pid)
+	if err != nil {
+		return nil, err
+	}
+
+	ret := &PageFaultsStat{
+		// Since Windows does not distinguish between Major and Minor faults, all faults are treated as Major
+		MajorFaults: uint64(mem.PageFaultCount),
+	}
+
+	return ret, nil
 }
 
 func (p *Process) ChildrenWithContext(ctx context.Context) ([]*Process, error) {