2019-2020-1 20199309 "Linux kernel principle and Analysis" in the third week of work

Complete a simple round-robin multi-channel kernel code

mykernel to build

• Set up this platform:

Since this step:

wget https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.9.4.tar.xz

Download too slow, I downloaded directly in the Windows environment and copy and paste into a virtual machine

among them:

wget https://raw.github.com/mengning/mykernel/master/mykernel_for_linux3.9.4sc.patch

Into this:

wget https://github.com/mengning/mykernel/blob/master/mykernel_for_linux3.9.4sc.patch

You can be downloaded to patch file

problem appear:

Compressed file to decompress the end of tar.xz, as follows:

$xz -d ***.tar.xz  
$tar -xvf ***.tar

In this way will result in the original * .tar.xz archive does not exist, you can see that this archive is then compressed package, is outside xz compression, the inner layer is packaged tar way.

A command can be used directly decompress:

tar xvJf ***.tar.xz  

To extract

- quote from the wind to the sand to

Decompression results:

Ubuntu installed to make:

Phrase began to have problems:

Try adding patch:

diff -Naur linux-3.9.4 linux-3.9.4.new/ > mykernel_for_linux3.9.4sc.patch

Or there should be a problem from extracting, re-extract delete unzip the file:

The results still have this question:

Is it because:
1. The file in question
2. Extract command error

Some people say, identify problems and access to information, is the time to download the installation package, download the installation package is not complete, once again re-download the installation package, unpack it again successful.

Download again, because the middle speed interrupted several times, use the following command can continue interrupted download from:

wget -c https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.9.4.tar.xz

Finally, the decompression process with no errors! Here decompression command is:

$xz -d ***.tar.xz  
$tar -xvf ***.tar

But the problem still exists

Later found

wget https://github.com/mengning/mykernel/blob/master/mykernel_for_linux3.9.4sc.patch

It is down to the file, but not the content, so I copy and paste the code directly under the patch in a virtual machine environment. If this is the truth, copy and paste can be achieved by sharing files.

try again:

This should be no problem.

make allnoconfig very smoothly

make this problem has emerged

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Downstairs experimental implementation process: