From 06be450d8c5c4c91342f9d930b3b085868533043 Mon Sep 17 00:00:00 2001
From: Costa Shulyupin <costa@MakeLinux.net>
Date: Thu, 21 Nov 2019 18:32:36 +0200
Subject: [PATCH] gvpr

---
 Linux_kernel_diagram.dot | 826 ++++++++++++++++++---------------------
 1 file changed, 385 insertions(+), 441 deletions(-)

diff --git a/Linux_kernel_diagram.dot b/Linux_kernel_diagram.dot
index 047fe77..bd05d1e 100644
--- a/Linux_kernel_diagram.dot
+++ b/Linux_kernel_diagram.dot
@@ -1,75 +1,51 @@
 digraph matrix {
 	graph [newrank=true,
-	      nodesep=0.1,
-	      overlap=true,
-	      ranksep=0.1,
-	      splines=false
+		nodesep=0.1,
+		overlap=true,
+		ranksep=0.1,
+		splines=false
+	];
+	node [fixedsize=false,
+		height=0.5,
+		shape=box,
+		style="filled,setlinewidth(3)",
+		width=1.1
 	];
 	edge [arrowhead=none,
-	     arrowsize=0.5,
-	     style=invis,
-	     weight=1
-	];
-	node [fixedsize=true,
-	     style=invis,
-	     width=0,
-	     height=0,
+		arrowsize=0.5,
+		style=invis,
+		weight=10
 	];
 	{
-		usr_	
-			functions_
-			D0
-			E0
-			F0
-			G0
-			H0
-	}
-	{
-		system_;
-		networking_;
-		storage_;
-		memory_;
-		processing_;
-		HI_;
-	}
-	node [height=0.3,
-	     width=1.1,
-	     shape=box,
-	     height=0.5,
-	     style="filled,setlinewidth(3)",
-	     fixedsize=false
-	];
-	edge [style="filled,setlinewidth(3)",
-	     weight=10
-	];
-	{
-		node [color="#e27dd6ff",
-		];
-		system	[color="#e27dd6ff",
+		node [color="#e27dd6ff"];
+		system_		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
+		system		 [color="#e27dd6ff",
 			fillcolor=white,
 			fixedsize=true,
 			height=0.3,
 			row=func,
 			tooltip=TODO,
 			width=1];
-		system_;
-		SCI	[color="#e27dd6ff",
+		system -> system_		 [arrowhead="",
+			color="#e27dd6ff",
+			row=func,
+			style="filled,setlinewidth(3)"];
+		SCI		 [color="#e27dd6ff",
 			fillcolor="#d9e7ee",
 			fixedsize=true,
 			label="System calls",
 			row=usr,
-			shape=ellipse,
-		];
-		system -> system_	[arrowhead="",
-		       color="#e27dd6ff",
-		       row=func];
-		sysfs	[color="#e27dd6ff",
+			shape=ellipse];
+		sysfs		 [color="#e27dd6ff",
 			fillcolor="#b2d3e4",
-			label="proc, sysfs,\nfile systems",
-		];
-		SCI -> sysfs	[color="#e27dd6ff",
-		    weight=10];
-		DM	[color="#e27dd6ff",
+			label="proc, sysfs,\nfile systems"];
+		SCI -> sysfs		 [color="#e27dd6ff",
+			style="filled,setlinewidth(3)"];
+		DM		 [color="#e27dd6ff",
 			fillcolor="#91b5c9",
 			fixedsize=true,
 			fontsize=10,
@@ -77,588 +53,556 @@ digraph matrix {
 			label="Device\nModel",
 			shape=octagon,
 			width=1];
-		sysfs -> DM	[color="#e27dd6ff",
-		      weight=10];
-		log_sys	[color="#e27dd6ff",
+		sysfs -> DM		 [color="#e27dd6ff",
+			style="filled,setlinewidth(3)"];
+		log_sys		 [color="#e27dd6ff",
 			fillcolor="#6a9ab1",
 			fontsize=10,
-			label="system run,\nmodules,\ngeneric\nHW access ",
-		];
-		DM -> log_sys	[color="#e27dd6ff",
-		   weight=10];
-		bus_drv	[color="#e27dd6ff",
+			label="system run,\nmodules,\ngeneric\nHW access "];
+		DM -> log_sys		 [color="#e27dd6ff",
+			style="filled,setlinewidth(3)"];
+		bus_drv		 [color="#e27dd6ff",
 			fillcolor="#71809b",
-			label="bus drivers",
-		];
-		log_sys -> bus_drv	[color="#e27dd6ff",
-			weight=10];
-		H2	[color="#e27dd6ff",
+			label="bus drivers"];
+		log_sys -> bus_drv		 [color="#e27dd6ff",
+			style="filled,setlinewidth(3)"];
+		H2		 [color="#e27dd6ff",
 			fillcolor="#777777",
 			fontcolor=white,
 			fontsize=10,
 			label="busess:\nPCI, USB ...",
-			row=chip,
-		];
-		bus_drv -> H2	[color="#e27dd6ff",
-			weight=10];
+			row=chip];
+		bus_drv -> H2		 [color="#e27dd6ff",
+			style="filled,setlinewidth(3)"];
 	}
 	{
-		node [color="#61c2c5",
-		];
+		node [color="#61c2c5"];
 		edge [color="#61c2c5"];
-		networking	[color="#61c2c5",
-				fillcolor=white,
-				fixedsize=true,
-				row=func,
-				style="filled,setlinewidth(3)",
-				width=1];
-		sock	[color="#61c2c5",
+		networking_		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
+		networking		 [color="#61c2c5",
+			fillcolor=white,
+			fixedsize=true,
+			row=func,
+			width=1];
+		networking -> networking_		 [arrowhead="",
+			color="#61c2c5",
+			row=func,
+			style="filled,setlinewidth(3)"];
+		sock		 [color="#61c2c5",
 			fillcolor="#d9e7ee",
 			fixedsize=true,
 			label=Sockets,
 			row=usr,
-			shape=ellipse,
+			shape=ellipse];
+		prot_fam		 [color="#61c2c5",
+			fillcolor="#b2d3e4",
+			label="protocol\nfamilies"];
+		sock -> prot_fam		 [color="#61c2c5",
 			style="filled,setlinewidth(3)"];
-		networking -> networking_	[arrowhead="",
-			   color="#61c2c5",
-			   row=func,
-			   style="filled,setlinewidth(3)",
-			   weight=10];
-		prot_fam	[color="#61c2c5",
-				fillcolor="#b2d3e4",
-				label="protocol\nfamilies",
-				style="filled,setlinewidth(3)"];
-		sock -> prot_fam	[color="#61c2c5",
-		     style="filled,setlinewidth(3)",
-		     weight=10];
-		log_prot	[color="#61c2c5",
-				fillcolor="#6a9ab1",
-				label="protocols:\nTCP, UDP, IP",
-				style="filled,setlinewidth(3)"];
-		prot_fam -> log_prot	[color="#61c2c5",
-			 style="filled,setlinewidth(3)",
-			 weight=10];
-		netif	[color="#61c2c5",
+		log_prot		 [color="#61c2c5",
+			fillcolor="#6a9ab1",
+			label="protocols:\nTCP, UDP, IP"];
+		prot_fam -> log_prot		 [color="#61c2c5",
+			style="filled,setlinewidth(3)"];
+		netif		 [color="#61c2c5",
 			fillcolor="#71809b",
 			fontsize=10,
-			label="network\ninterfaces\nand drivers",
+			label="network\ninterfaces\nand drivers"];
+		log_prot -> netif		 [color="#61c2c5",
 			style="filled,setlinewidth(3)"];
-		log_prot -> netif	[color="#61c2c5",
-			 style="filled,setlinewidth(3)",
-			 weight=10];
-		net_hw	[color="#61c2c5",
+		net_hw		 [color="#61c2c5",
 			fillcolor="#777777",
 			fontcolor=white,
 			fontsize=10,
 			label="network:\nEthernet, WiFi ...",
-			row=chip,
+			row=chip];
+		netif -> net_hw		 [color="#61c2c5",
 			style="filled,setlinewidth(3)"];
-		netif -> net_hw	[color="#61c2c5",
-		      style="filled,setlinewidth(3)",
-		      weight=10];
-		NFS	[color="#8383cc",
+		NFS		 [color="#8383cc",
 			fillcolor="#91b5c9",
 			fixedsize=true,
 			height=0.4,
 			label=NFS,
 			shape=octagon,
-			style="filled,setlinewidth(3)",
 			width=0.6];
-		NFS -> log_prot	[color="#61c2c5",
-		    style="filled,setlinewidth(3)",
-		    weight=0];
+		NFS -> log_prot		 [color="#61c2c5",
+			style="filled,setlinewidth(3)",
+			weight=0];
 	}
 	{
-		node [color="#8383cc",
-		];
+		node [color="#8383cc"];
 		edge [color="#8383cc"];
+		storage_		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
 		NFS;
-		storage	[color="#8383cc",
+		storage		 [color="#8383cc",
 			fillcolor=white,
 			fixedsize=true,
 			row=func,
-			style="filled,setlinewidth(3)",
 			width=1];
-		FS	[color="#8383cc",
+		storage -> storage_		 [arrowhead="",
+			color="#8383cc",
+			row=func,
+			style="filled,setlinewidth(3)"];
+		FS		 [color="#8383cc",
 			fillcolor="#d9e7ee",
 			fixedsize=true,
 			label="files and\ndirectories",
 			row=usr,
-			shape=ellipse,
-			style="filled,setlinewidth(3)"];
-		storage -> storage_	[arrowhead="",
-			color="#8383cc",
-			row=func,
-			style="filled,setlinewidth(3)",
-			weight=10];
-		VFS	[color="#8383cc",
+			shape=ellipse];
+		VFS		 [color="#8383cc",
 			fillcolor="#b2d3e4",
-			label="Virtual\nFile System",
+			label="Virtual\nFile System"];
+		FS -> VFS		 [color="#8383cc",
 			style="filled,setlinewidth(3)"];
-		FS -> VFS	[color="#8383cc",
-		   style="filled,setlinewidth(3)",
-		   weight=10];
-		VFS -> NFS	[color="#8383cc",
-		    style="filled,setlinewidth(3)",
-		    weight=0];
-		logFS	[color="#8383cc",
+		VFS -> NFS		 [color="#8383cc",
+			style="filled,setlinewidth(3)",
+			weight=0];
+		logFS		 [color="#8383cc",
 			fillcolor="#6a9ab1",
 			fontsize=10,
-			label="logical\nfilesystems:\next3, xfs ...",
+			label="logical\nfilesystems:\next3, xfs ..."];
+		VFS -> logFS		 [color="#8383cc",
 			style="filled,setlinewidth(3)"];
-		VFS -> logFS	[color="#8383cc",
-		    style="filled,setlinewidth(3)",
-		    weight=10];
-		PC	[color="#51bf5b",
+		PC		 [color="#51bf5b",
 			fillcolor="#91b5c9",
 			fixedsize=true,
 			fontsize=10,
 			height=0.4,
 			label="page\ncache",
 			shape=octagon,
-			style="filled,setlinewidth(3)",
 			width=0.6];
-		VFS -> PC	[color="#8383cc",
-		    style="filled,setlinewidth(3)",
-		    weight=0];
-		mmap	[color="#51bf5b",
+		VFS -> PC		 [color="#8383cc",
+			style="filled,setlinewidth(3)",
+			weight=0];
+		mmap		 [color="#51bf5b",
 			fillcolor="#91b5c9",
 			fixedsize=true,
 			fontsize=10,
 			height=0.4,
 			label="memory\nmapping",
 			shape=octagon,
-			style="filled,setlinewidth(3)",
 			width=1];
-		VFS -> mmap	[color="#8383cc",
-		    style="filled,setlinewidth(3)",
-		    weight=0];
-		block	[color="#8383cc",
+		VFS -> mmap		 [color="#8383cc",
+			style="filled,setlinewidth(3)",
+			weight=0];
+		block		 [color="#8383cc",
 			fillcolor="#71809b",
 			fontsize=10,
-			label="Block\ndevices\nand drivers",
+			label="Block\ndevices\nand drivers"];
+		logFS -> block		 [color="#8383cc",
 			style="filled,setlinewidth(3)"];
-		logFS -> block	[color="#8383cc",
-		      style="filled,setlinewidth(3)",
-		      weight=10];
-		PA	[color="#51bf5b",
+		PA		 [color="#51bf5b",
 			fillcolor="#71809b",
-			label="Page\nAllocator",
-			style="filled,setlinewidth(3)"];
-		PC -> PA	[color="#51bf5b",
-		   style="filled,setlinewidth(3)",
-		   weight=0];
-		H4	[color="#8383cc",
+			label="Page\nAllocator"];
+		PC -> PA		 [color="#51bf5b",
+			style="filled,setlinewidth(3)",
+			weight=0];
+		H4		 [color="#8383cc",
 			fillcolor="#777777",
 			fontcolor=white,
 			fontsize=10,
 			label="storage devices:\nSCSI, NVMe ...",
-			row=chip,
+			row=chip];
+		block -> H4		 [color="#8383cc",
 			style="filled,setlinewidth(3)"];
-		block -> H4	[color="#8383cc",
-		      style="filled,setlinewidth(3)",
-		      weight=10];
-		SW	[color="#8383cc",
+		SW		 [color="#8383cc",
 			fillcolor="#91b5c9",
 			fixedsize=true,
 			label=Swap,
 			shape=octagon,
-			style="filled,setlinewidth(3)",
 			width=0.6];
-		SW -> block	[color="#8383cc",
-		   style="filled,setlinewidth(3)",
-		   weight=0];
+		SW -> block		 [color="#8383cc",
+			style="filled,setlinewidth(3)",
+			weight=0];
 	}
 	{
 		node [color="#c46747",
-			     style="filled,setlinewidth(3)",
+			style="filled,setlinewidth(3)"
 		];
 		edge [color="#c46747"];
-		processing	[color="#c46747",
-				fillcolor=white,
-				fixedsize=true,
-				row=func,
-				width=1];
-		proc	[color="#c46747",
+		processing_		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
+		processing		 [color="#c46747",
+			fillcolor=white,
+			fixedsize=true,
+			row=func,
+			width=1];
+		processing -> processing_		 [arrowhead="",
+			color="#c46747",
+			row=func,
+			style="filled,setlinewidth(3)"];
+		proc		 [color="#c46747",
 			fillcolor="#d9e7ee",
 			fixedsize=true,
 			label=Processes,
 			row=usr,
-			shape=ellipse,
+			shape=ellipse];
+		Tasks		 [color="#c46747",
+			fillcolor="#b2d3e4"];
+		proc -> Tasks		 [color="#c46747",
 			style="filled,setlinewidth(3)"];
-		processing -> processing_	[arrowhead="",
-			   color="#c46747",
-			   row=func,
-			   style="filled,setlinewidth(3)",
-			   weight=10];
-		Tasks	[color="#c46747",
-			fillcolor="#b2d3e4",
-			style="filled,setlinewidth(3)"];
-		proc -> Tasks	[color="#c46747",
-		     style="filled,setlinewidth(3)",
-		     weight=10];
-		sync	[color="#c46747",
+		sync		 [color="#c46747",
 			fillcolor="#91b5c9",
 			fixedsize=true,
 			fontsize=10,
 			label=synchronization,
-			shape=octagon,
+			shape=octagon];
+		Tasks -> sync		 [color="#c46747",
 			style="filled,setlinewidth(3)"];
-		Tasks -> sync	[color="#c46747",
-		      style="filled,setlinewidth(3)",
-		      weight=10];
-		sched	[color="#c46747",
+		sched		 [color="#c46747",
 			fillcolor="#6a9ab1",
-			label=Scheduler,
+			label=Scheduler];
+		sync -> sched		 [color="#c46747",
 			style="filled,setlinewidth(3)"];
-		sync -> sched	[color="#c46747",
-		     style="filled,setlinewidth(3)",
-		     weight=10];
-		IRQ	[color="#c46747",
+		IRQ		 [color="#c46747",
 			fillcolor="#71809b",
 			fontsize=10,
-			label="interrupts\ncore,\nCPU arch",
+			label="interrupts\ncore,\nCPU arch"];
+		sched -> IRQ		 [color="#c46747",
 			style="filled,setlinewidth(3)"];
-		sched -> IRQ	[color="#c46747",
-		      style="filled,setlinewidth(3)",
-		      weight=10];
-		CPU	[color="#c46747",
+		CPU		 [color="#c46747",
 			fillcolor="#777777",
 			fontcolor=white,
 			fontsize=10,
-			row=chip,
+			row=chip];
+		IRQ -> CPU		 [color="#c46747",
 			style="filled,setlinewidth(3)"];
-		IRQ -> CPU	[color="#c46747",
-		    style="filled,setlinewidth(3)",
-		    weight=10];
 	}
 	{
 		node [color="#cfbf57ff",
-			     style="filled,setlinewidth(3)",
+			style="filled,setlinewidth(3)"
 		];
 		edge [color="#cfbf57ff"];
-		HI	[color="#cfbf57ff",
+		HI_		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
+		HI		 [color="#cfbf57ff",
 			fillcolor=white,
 			fixedsize=true,
 			label="human\ninterface",
 			row=func,
 			width=1];
-		char	[color="#cfbf57ff",
+		HI -> HI_		 [arrowhead="",
+			color="#cfbf57ff",
+			row=func,
+			style="filled,setlinewidth(3)"];
+		char		 [color="#cfbf57ff",
 			fillcolor="#d9e7ee",
 			fixedsize=true,
 			label="char\ndevices",
 			row=usr,
-			shape=ellipse,
-			style="filled,setlinewidth(3)"];
-		HI -> HI_	[arrowhead="",
-		   color="#cfbf57ff",
-		   row=func,
-		   style="filled,setlinewidth(3)",
-		   weight=10];
-		input	[color="#cfbf57ff",
+			shape=ellipse];
+		input		 [color="#cfbf57ff",
 			fillcolor="#b2d3e4",
-			label="input\nsubsystem",
+			label="input\nsubsystem"];
+		char -> input		 [color="#cfbf57ff",
 			style="filled,setlinewidth(3)"];
-		char -> input	[color="#cfbf57ff",
-		     style="filled,setlinewidth(3)",
-		     weight=10];
-		F7	[color="#cfbf57ff",
+		F7		 [color="#cfbf57ff",
 			fillcolor="#6a9ab1",
-			label="HI class\ndrivers",
+			label="HI class\ndrivers"];
+		input -> F7		 [color="#cfbf57ff",
 			style="filled,setlinewidth(3)"];
-		input -> F7	[color="#cfbf57ff",
-		      style="filled,setlinewidth(3)",
-		      weight=10];
-		G7	[color="#cfbf57ff",
+		G7		 [color="#cfbf57ff",
 			fillcolor="#71809b",
 			fontsize=10,
-			label="HI\nperipherals\ndrivers",
+			label="HI\nperipherals\ndrivers"];
+		F7 -> G7		 [color="#cfbf57ff",
 			style="filled,setlinewidth(3)"];
-		F7 -> G7	[color="#cfbf57ff",
-		   style="filled,setlinewidth(3)",
-		   weight=10];
-		H7	[color="#cfbf57ff",
+		H7		 [color="#cfbf57ff",
 			fillcolor="#777777",
 			fontcolor=white,
 			fontsize=10,
 			label="display, keyboard,\nmouse, audio",
-			row=chip,
+			row=chip];
+		G7 -> H7		 [color="#cfbf57ff",
 			style="filled,setlinewidth(3)"];
-		G7 -> H7	[color="#cfbf57ff",
-		   style="filled,setlinewidth(3)",
-		   weight=10];
-	}
-	{
-		usr_;
-		D0;
-		E0;
-		F0;
-		G0;
-		H0;
-		functions	[color=gray,
-				fillcolor=gray,
-				fixedsize=true,
-				height=0.5,
-				row=func,
-				style=dashed,
-				width=0.8];
-		layers	[fillcolor=lightgray,
-			height=0.1,
-			style="filled,setlinewidth(0)",
-			width=0.5];
-		functions -> layers	[style=invis,
-			  weight=10];
-		usr	[fillcolor="#d9e7eeff",
-			fixedsize=true,
-			height=0.5,
-			label="user space\ninterfaces",
-			row=usr,
-			shape=ellipse,
-			style="filled,setlinewidth(0)"];
-		layers -> usr	[arrowhead="",
-		       color=gray,
-		       style="filled,setlinewidth(1)",
-		       weight=10];
-		usr -> usr_	[arrowhead="",
-		    color="#d9e7eeff",
-		    minlen=2,
-		    style="filled,setlinewidth(3)",
-		    weight=10];
-		virt	[fillcolor="#b2d3e4",
-			height=0.5,
-			label="virtual\nsubsystems",
-			style="filled,setlinewidth(0)"];
-		usr -> virt	[color="#d9e7eeff",
-		    style="filled,setlinewidth(3)",
-		    weight=10];
-		virt -> D0	[arrowhead="",
-		     color="#b2d3e4",
-		     minlen=2,
-		     style="filled,setlinewidth(3)",
-		     weight=10];
-		bridges	[fillcolor="#91b5c9",
-			height=0.5,
-			shape=octagon,
-			style="filled,setlinewidth(0)"];
-		virt -> bridges	[color="#b2d3e4",
-		     style="filled,setlinewidth(3)",
-		     weight=10];
-		bridges -> E0	[arrowhead="",
-			color="#91b5c9",
-			minlen=2,
-			style="filled,setlinewidth(3)",
-			weight=""];
-		logical	[fillcolor="#6a9ab1",
-			height=0.5,
-			style="filled,setlinewidth(0)"];
-		bridges -> logical	[color="#91b5c9",
-			style="filled,setlinewidth(3)",
-			weight=10];
-		logical -> F0	[arrowhead="",
-			color="#6a9ab1",
-			minlen=2,
-			row=logical,
-			style="filled,setlinewidth(3)",
-			weight=""];
-		HWI	[fillcolor="#71809b",
-			height=0.5,
-			label="hardware\ninterfaces",
-			style="filled,setlinewidth(0)"];
-		logical -> HWI	[color="#6a9ab1",
-			row=logical,
-			style="filled,setlinewidth(3)",
-			weight=10];
-		HWI -> G0	[arrowhead="",
-		    color="#71809b",
-		    minlen=2,
-		    row=HWI,
-		    style="filled,setlinewidth(3)",
-		    weight=""];
-		HW	[fillcolor="#777777",
-			fontcolor=white,
-			height=0.5,
-			label="electronics,\nhardware",
-			row=chip,
-			style="filled,setlinewidth(0)"];
-		HWI -> HW	[color="#71809b",
-		    row=HWI,
-		    style="filled,setlinewidth(3)",
-		    weight=10];
-		HW -> H0	[arrowhead="",
-		   color="#777777",
-		   minlen=2,
-		   row=chip,
-		   style="filled,setlinewidth(3)",
-		   weight=""];
-	}
-	subgraph mem {
-		node [color="#51bf5b",
-		     height=0.5
-		];
-		edge [color="#51bf5b"];
-		PC;
-		mmap;
-		SW;
-		mmap -> SW	[color="#51bf5b",
-		     style="filled,setlinewidth(3)",
-		     weight=0];
-		log_mem	[color="#51bf5b",
-			fillcolor="#6a9ab1",
-			height=0.5,
-			label="logical\nmemory",
-			style="filled,setlinewidth(3)"];
-		mmap -> log_mem	[color="#51bf5b",
-		     style="filled,setlinewidth(3)",
-		     weight=10];
-		PA;
-		H5	[color="#51bf5b",
-			fillcolor="#777777",
-			fontcolor=white,
-			fontsize=10,
-			height=0.5,
-			label="MMU, RAM",
-			row=chip,
-			style="filled,setlinewidth(3)"];
-		PA -> H5	[color="#51bf5b",
-		   style="filled,setlinewidth(3)",
-		   weight=10];
-		log_mem -> PA	[color="#51bf5b",
-			style="filled,setlinewidth(3)",
-			weight=10];
-		memory	[color="#51bf5b",
-			fillcolor=white,
-			fixedsize=true,
-			height=0.5,
-			row=func,
-			style="filled,setlinewidth(3)",
-			width=1];
-		MA	[color="#51bf5b",
-			fillcolor="#d9e7ee",
-			fixedsize=true,
-			height=0.5,
-			label="memory\naccess",
-			row=usr,
-			shape=ellipse,
-			style="filled,setlinewidth(3)"];
-		memory -> memory_	[arrowhead="",
-		       color="#51bf5b",
-		       row=func,
-		       style="filled,setlinewidth(3)",
-		       weight=10];
-		VM	[color="#51bf5b",
-			fillcolor="#b2d3e4",
-			height=0.5,
-			label="Virtual\nmemory",
-			style="filled,setlinewidth(3)"];
-		MA -> VM	[color="#51bf5b",
-		   style="filled,setlinewidth(3)",
-		   weight=10];
-		VM -> mmap	[color="#51bf5b",
-		   style="filled,setlinewidth(3)",
-		   weight=10];
 	}
 	{
 		graph [rank=same];
-		edge [weight=10 style=invis];
-		functions_;
+		edge [style=invis,
+			weight=10
+		];
+		functions_		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
 		system;
 		functions_ -> system;
 		networking;
 		system -> networking;
 		storage;
 		networking -> storage;
-		memory;
+		memory		 [color="#51bf5b",
+			fillcolor=white,
+			fixedsize=true,
+			row=func,
+			width=1];
 		storage -> memory;
 		processing;
 		HI;
 		processing -> HI;
-		functions;
-		functions -> functions_	[arrowhead="",
-			  color=gray,
-			  style="",
-			  weight=""];
+		functions		 [color=gray,
+			fillcolor=gray,
+			fixedsize=true,
+			row=func,
+			style=dashed,
+			width=0.8];
+		functions -> functions_		 [arrowhead="",
+			color=gray,
+			style="",
+			weight=""];
 		memory -> processing;
 	}
 	{
 		graph [rank=same];
-		usr_;
+		usr_		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
 		SCI;
 		sock;
 		FS;
 		proc;
 		char;
-		usr;
-		MA;
+		usr		 [fillcolor="#d9e7eeff",
+			fixedsize=true,
+			label="user space\ninterfaces",
+			row=usr,
+			shape=ellipse,
+			style="filled,setlinewidth(0)"];
+		MA		 [color="#51bf5b",
+			fillcolor="#d9e7ee",
+			fixedsize=true,
+			label="memory\naccess",
+			row=usr,
+			shape=ellipse];
 	}
 	{
-		edge [weight=10 style=invis];
-		system_ -> SCI
-			networking_ -> sock;
+		edge [style=invis,
+			weight=10
+		];
+		system_;
+		SCI;
+		system_ -> SCI;
+		networking_;
+		sock;
+		networking_ -> sock;
+		storage_;
+		FS;
 		storage_ -> FS;
+		memory_		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
+		MA;
 		memory_ -> MA;
+		processing_;
+		proc;
 		processing_ -> proc;
+		HI_;
+		char;
 		HI_ -> char;
 	}
 	{
 		graph [rank=same];
-		D0;
+		D0		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
 		sysfs;
 		prot_fam;
 		VFS;
 		Tasks;
 		input;
-		virt;
-		VM;
+		virt		 [fillcolor="#b2d3e4",
+			label="virtual\nsubsystems",
+			style="filled,setlinewidth(0)"];
+		VM		 [color="#51bf5b",
+			fillcolor="#b2d3e4",
+			label="Virtual\nmemory"];
 	}
 	{
 		graph [rank=same];
 		node [fontcolor=white];
-		E0;
+		E0		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
 		DM;
 		NFS;
 		mmap;
 		sync;
-		bridges;
+		bridges		 [fillcolor="#91b5c9",
+			shape=octagon,
+			style="filled,setlinewidth(0)"];
 	}
 	{
 		graph [rank=same];
-		F0;
+		F0		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
 		log_sys;
 		log_prot;
 		logFS;
 		sched;
 		F7;
-		logical;
-		log_mem;
+		logical		 [fillcolor="#6a9ab1",
+			style="filled,setlinewidth(0)"];
+		log_mem		 [color="#51bf5b",
+			fillcolor="#6a9ab1",
+			label="logical\nmemory"];
 	}
 	{
 		graph [rank=same];
-		G0;
+		G0		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
 		bus_drv;
 		netif;
 		block;
 		PA;
 		IRQ;
 		G7;
-		HWI;
+		HWI		 [fillcolor="#71809b",
+			label="hardware\ninterfaces",
+			style="filled,setlinewidth(0)"];
 	}
 	{
 		graph [rank=same];
-		H0;
+		H0		 [fixedsize=true,
+			height=0,
+			shape="",
+			style=invis,
+			width=0];
 		H2;
 		net_hw;
 		H4;
 		CPU;
 		H7;
-		HW;
-		H5;
+		HW		 [fillcolor="#777777",
+			fontcolor=white,
+			label="electronics,\nhardware",
+			row=chip,
+			style="filled,setlinewidth(0)"];
+		H5		 [color="#51bf5b",
+			fillcolor="#777777",
+			fontcolor=white,
+			fontsize=10,
+			label="MMU, RAM",
+			row=chip];
 	}
-	bottom	[label="© 2007-2019 Constantine Shulyupin http://www.MakeLinux.net/kernel/diagram",
+	subgraph mem {
+		node [color="#51bf5b",
+			height=0.5
+		];
+		edge [color="#51bf5b"];
+		memory_;
+		PC;
+		mmap;
+		SW;
+		mmap -> SW		 [color="#51bf5b",
+			style="filled,setlinewidth(3)",
+			weight=0];
+		log_mem;
+		mmap -> log_mem		 [color="#51bf5b",
+			style="filled,setlinewidth(3)"];
+		PA;
+		H5;
+		PA -> H5		 [color="#51bf5b",
+			style="filled,setlinewidth(3)"];
+		log_mem -> PA		 [color="#51bf5b",
+			style="filled,setlinewidth(3)"];
+		memory;
+		memory -> memory_		 [arrowhead="",
+			color="#51bf5b",
+			row=func,
+			style="filled,setlinewidth(3)"];
+		MA;
+		VM;
+		MA -> VM		 [color="#51bf5b",
+			style="filled,setlinewidth(3)"];
+		VM -> mmap		 [color="#51bf5b",
+			style="filled,setlinewidth(3)"];
+	}
+	bottom	 [label="© 2007-2019 Constantine Shulyupin http://www.MakeLinux.net/kernel/diagram",
 		shape=plaintext];
-	H4 -> bottom	[weight=""];
-	LKD	[fontsize=20,
+	H4 -> bottom	 [style="filled,setlinewidth(3)",
+		weight=""];
+	layers	 [fillcolor=lightgray,
+		height=0.1,
+		style="filled,setlinewidth(0)",
+		width=0.5];
+	functions -> layers;
+	layers -> usr	 [arrowhead="",
+		color=gray,
+		style="filled,setlinewidth(1)"];
+	usr -> usr_	 [arrowhead="",
+		color="#d9e7eeff",
+		minlen=2,
+		style="filled,setlinewidth(3)"];
+	usr -> virt	 [color="#d9e7eeff",
+		style="filled,setlinewidth(3)"];
+	virt -> D0	 [arrowhead="",
+		color="#b2d3e4",
+		minlen=2,
+		style="filled,setlinewidth(3)"];
+	virt -> bridges	 [color="#b2d3e4",
+		style="filled,setlinewidth(3)"];
+	bridges -> E0	 [arrowhead="",
+		color="#91b5c9",
+		minlen=2,
+		style="filled,setlinewidth(3)",
+		weight=""];
+	bridges -> logical	 [color="#91b5c9",
+		style="filled,setlinewidth(3)"];
+	logical -> F0	 [arrowhead="",
+		color="#6a9ab1",
+		minlen=2,
+		row=logical,
+		style="filled,setlinewidth(3)",
+		weight=""];
+	logical -> HWI	 [color="#6a9ab1",
+		row=logical,
+		style="filled,setlinewidth(3)"];
+	HWI -> G0	 [arrowhead="",
+		color="#71809b",
+		minlen=2,
+		row=HWI,
+		style="filled,setlinewidth(3)",
+		weight=""];
+	HWI -> HW	 [color="#71809b",
+		row=HWI,
+		style="filled,setlinewidth(3)"];
+	HW -> H0	 [arrowhead="",
+		color="#777777",
+		minlen=2,
+		row=chip,
+		style="filled,setlinewidth(3)",
+		weight=""];
+	LKD	 [fontsize=20,
 		label="Linux kernel diagram",
 		shape=plain];
-	edge [weight=10 style=invis];
 	LKD -> storage;
 }