allows setting volatile overlay mount option

given that buildkit is generally very IO intensive, some preliminary tests have shown that adding the volatile option could yield up to a 15% performance improvements in some cases. ref: https://docs.kernel.org/filesystems/overlayfs.html#volatile-mount Signed-off-by: Marcos Lilljedahl <[email protected]>
moby · Sep 29, 2024 · 3ab3ae4 · 3ab3ae4
1 parent 185751b
commit 3ab3ae4
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/util/overlay/overlay_linux.go b/util/overlay/overlay_linux.go
@@ -95,7 +95,7 @@ func GetOverlayLayers(m mount.Mount) ([]string, error) {
 			for i, j := 0, len(l)-1; i < j; i, j = i+1, j-1 {
 				l[i], l[j] = l[j], l[i] // make l[0] = bottommost
 			}
-		} else if strings.HasPrefix(o, "workdir=") || o == "index=off" || o == "userxattr" || strings.HasPrefix(o, "redirect_dir=") {
+		} else if strings.HasPrefix(o, "workdir=") || o == "index=off" || o == "userxattr" || strings.HasPrefix(o, "redirect_dir=") || o == "volatile" {
 			// these options are possible to specfied by the snapshotter but not indicate dir locations.
 			continue
 		} else {