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--- libvirt5.xml	2021-06-30 11:33:12.796353471 +0200
+++ libvirt7.xml	2021-06-30 11:33:24.072141548 +0200
@@ -1,4 +1,4 @@
-<domain type='kvm' id='3'>
+<domain type='kvm'>
   <name>dc01</name>
   <uuid>1718d28f-00b9-4b1c-be6f-51ed3423bb8e</uuid>
   <memory unit='KiB'>6291456</memory>
@@ -53,7 +53,6 @@
       <backingStore/>

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libvirt 5:

-drive file=/vm/ata2018/dc01.raw,format=raw,if=none,id=drive-virtio-disk0,cache=none
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1,write-cache=on

-drive file=/vm/ata2018/dc01-2.raw,format=raw,if=none,id=drive-virtio-disk1,cache=none
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk1,id=virtio-disk1,write-cache=on

libvirt 7:                                                                                                                              

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libvirt 5:

-drive file=/vm/ata2018/dc01.raw,format=raw,if=none,id=drive-virtio-disk0,cache=none
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1,write-cache=on                  

-drive file=/vm/ata2018/dc01-2.raw,format=raw,if=none,id=drive-virtio-disk1,cache=none
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk1,id=virtio-disk1,write-cache=on

libvirt 7:

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libvirt 5:

-drive file=/vm/ata2018/dc01.raw,format=raw,if=none,id=drive-virtio-disk0,cache=none
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1,write-cache=on

-drive file=/vm/ata2018/dc01-2.raw,format=raw,if=none,id=drive-virtio-disk1,cache=none
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk1,id=virtio-disk1,write-cache=on

libvirt 7:

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#!/usr/bin/env python3
#
# Building a tar file chunk-by-chunk.
#
# This is a quick bit of sample code for streaming data to a tar file,
# building it piece-by-piece. The tarfile is built on-the-fly and streamed
# back out. This is useful for web applications that need to dynamically
# build a tar file without swamping the server.
import os
import sys

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Mr. Mackey booting linux 2.0 in latest southpark episode,
It seems they used the output of the example kernel
messages as provided here:

https://docstore.mik.ua/orelly/linux/run/ch05_03.htm

--
Console: 16 point font, 480 scans
Console: colour VGA+ 80x30, 1 virtual console (max 63)
pcibios_init : BIOS32 Service Directory structure at 0x000fb1d0

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fs.com type switches, model S5850 run regular linux.

Secret command "start shell" can be used to spawn regular shell on switch for debugging.
Password for this: !@#

Example:

$ show version
FSOS Software, S5850, Version 7.2.1
Copyright (C) 2020 by FS.COM.  All rights reserved.

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diff --git a/copy/main.c b/copy/main.c
index c0c9421..5da91bd 100644
--- a/copy/main.c
+++ b/copy/main.c
@@ -46,6 +46,8 @@
 
 bool allocated;                     /* --allocated flag */
 unsigned connections = 4;           /* --connections */
+char* context = "base:allocation";  /* -- context */
+bool use_bitmap = false;