Samuel Thibault <samuel.thiba...@gnu.org> writes: > Hello, > > I applied it except. > >> I added an image to the microkernel page. > > It could be much better by introducing the glibc layer and writing > "POSIX call" and "RPC calls". On monolithic systems, the application > calls a glibc function which just makes a system call. On the Hurd, the > application calls a glibc function which makes an RPC to a file server.
I added the inkscape patch, but I not certain that you have paragraph. So I'm attaching the paragraph. I'll try to rebase against master soon, so that you don't have to manually edit my patches. To learn about microkernels, it can be helpful to compare microkernels with monolithic kernels, which the following image does. You can see that the monolithic kernels (linux), have more things running inside the kernel mode, but microkernels generally only have IPC, virtual memory, and scheduling inside the kernel. Some microkernels can actually have the scheduler in userspace! Also notice from the image the "POSIX call" and "RPC calls" layer. On the Hurd, this is glibc. Thanks, Joshua
>From 9856f46cedb32e03802730280e69898fec3f55d2 Mon Sep 17 00:00:00 2001 From: Joshua Branson <jbra...@fastmail.com> Date: Sat, 10 Nov 2018 11:09:02 -0500 Subject: [PATCH] An image explaining microkernels. --- microkernel.mdwn | 12 +- microkernel/OS-structure.svg | 557 +++++++++++++++++++++++++++++++---- 2 files changed, 502 insertions(+), 67 deletions(-) diff --git a/microkernel.mdwn b/microkernel.mdwn index 46a2ca38..a9e2cd1e 100644 --- a/microkernel.mdwn +++ b/microkernel.mdwn @@ -20,16 +20,20 @@ maximize the flexibility of implementation (by imposing minimal [[policy]]) while allowing the efficient implementation of the remainder of the system. -<!-- -The following file is in the public domain -https://en.wikipedia.org/wiki/Microkernel#/media/File:OS-structure.svg --> - To learn about microkernels, it can be helpful to compare microkernels with monolithic kernels, which the following image does. You can see that the monolithic kernels (linux), have more things running inside the kernel mode, but microkernels generally only have IPC, virtual memory, and scheduling inside the kernel. Some microkernels can actually have the scheduler in userspace! +Also notice from the image the "POSIX call" and "RPC calls" layer. 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> > Samuel
