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Old 05-07-2018, 09:12 AM   #1
Registered: Dec 2017
Location: Regensburg, DE
Distribution: Slackware -current
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A good advice on how to analyse code in the kernel


Currently I have to analyse/understand how the deadline scheduler works.
I have read the documentation, and it is good and intereting, but unfortunatelly I need to have an understanding at a more technical level.
I began checking out the code and I have spotted two problems that at the moment are preventing me from making progress (fast) in understanding it:
  1. 1. There are some structures which I am not familiar with --> This is ok, but then I find out these structures might contain also structures which also contain structures which I don't know. This becomes time consuming only in understanding the structures and the relationships between them.
  2. 2. For some functions it is not difficult to understand what they do (what they do with the structures). But then the problem is in general I haven't been able to get an understanding of what the scheduler is doing (or how) with all this bunch of functions - The big picture.

So, I was wondering if somebody else already went through a similar situation and if so, is there any advice you could give me?

Old 05-07-2018, 09:27 AM   #2
Registered: Mar 2011
Location: MA, USA
Distribution: MINT Debian, Angstrom, SUSE, Ubuntu, Debian
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Ask more specific questions about code clips and references to files which you are reading, and show the code clips and reference links.

Ask them in the Linux Kernel forum.

Share your impressions as well as your questions.

Review the documentation, if any, in advance of asking your question.

This is absolutely a very detailed topic. Reading the code is difficult, but also something which will help you to learn enough to ask some intelligent questions about it.

All I can say for myself is that I typically find that as I prepare enough organized thoughts to frame my questions about a large body of code, I discover answers for my questions.
Old 05-11-2018, 04:52 AM   #3
Registered: Dec 2017
Location: Regensburg, DE
Distribution: Slackware -current
Posts: 31

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Thanks for your answer!


kernel, modules, scheduler

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