Samuel Thibault <samuel.thiba...@gnu.org> writes:

> Hello,
>
> Joshua Branson, le ven. 02 nov. 2018 12:39:05 -0400, a ecrit:
>> I guess I'm a visual learner.  I hope some might find this graphic
>> helpful.  I'm making it it's own patch, because I'm not certain how
>> accurate this "image" is.
>
> It's correct, but could be improved: I'd say rather take the example of
> glibc's send(), which is an RPC handled by pfinet, which uses a
> device_write RPC to actually emit an Ethernet frame, which is handled by
> netdde, which pushes the hardware, and gets an interrupt from GNU Mach
> when that's done.

I think the new attached patch shows that, but I'm not an expert.

>From 357b34510580104c023648aab6c726cc75a1b141 Mon Sep 17 00:00:00 2001
From: Joshua Branson <jbra...@fastmail.com>
Date: Fri, 9 Nov 2018 11:53:30 -0500
Subject: [PATCH] I tweaked the image on the anantomy of a hurd system page.

---
 open_issues/anatomy_of_a_hurd_system.mdwn | 50 ++++++++++++++---------
 1 file changed, 30 insertions(+), 20 deletions(-)

diff --git a/open_issues/anatomy_of_a_hurd_system.mdwn b/open_issues/anatomy_of_a_hurd_system.mdwn
index 00720fbb..bd31bd89 100644
--- a/open_issues/anatomy_of_a_hurd_system.mdwn
+++ b/open_issues/anatomy_of_a_hurd_system.mdwn
@@ -27,28 +27,38 @@ TCP/IP stack, and others.  The GNU/Hurd system implements POSIX with glibc.  Man
 POSIX calls to glibc are re-routed to the Hurd servers.  Some of the Hurd severs
 depend on GNU Mach, while other Hurd servers depend on other Hurd servers.
 
+The graphic below demonstrates this.  In the picture glibc's send(), which is an
+RPC handled by pfinet, which uses a device_write RPC to actually emit an Ethernet
+frame, which is handled by netdde, which pushes the hardware, and gets an interrupt
+from GNU Mach when that's done.
+
+
                                   The Hurd
 
-                        ---------------------------
-                        |         glibc           |
-                        |                         |
-                        | read                    |
-                        ---------------------------
-                           \
-                            \
-                             \
-                              \
-                        ---------------------------------------
-                        |      \     Hurd Servers             |
-                        |     ext2fs   auth --- other servers |
-                        |       \                             |
-                        --------------------------------------
-                                  \
-                              libdiskfs
-                                   \    /
-                                    \  /
-                                     \/
-                                   GNU Mach
+                    ---------------------------------
+                    |         glibc functions       |
+                    |                               |
+                    | send()                        |
+                    ---------------------------------
+                        \
+                         \
+                          \
+                    ---------------------------------------
+                    |      \     Hurd Servers             |
+                    |      |                              |
+                    |      |        auth and other servers|
+                    |      |                              |
+                    |     pfinet -> device_write RPC      |
+                    |      \               |              |
+                    |       \              |              |
+                    |        \             |              |
+                    --------------------------------------
+                               \          /
+                                \     netdde
+                                 \      /
+                                  \    /
+                                   \  /
+                                  GNU Mach
 
 
 # Bootstrap
-- 
2.19.1

>
> Samuel

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