linux-kernel - Re: Understanding IO architecture

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Message-ID: <CAO6TR8VdO-s9nu42cyPd5jiCzUOm7v+vsah+jR9_cn6eCUtCCA@mail.gmail.com>
Date:	Fri, 15 Jan 2016 09:35:36 -0700
From:	Jeff Merkey <linux.mdb@...il.com>
To:	Mahmood Naderan <mahmood.nt@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Understanding IO architecture

On 1/15/16, Jeff Merkey <linux.mdb@...il.com> wrote:
> On 1/15/16, Mahmood Naderan <mahmood.nt@...il.com> wrote:
>> What is the good starting point to understand linux kernel? I know you
>> are going to say Understanding the Linux Kernel, but that is for 2005!
>> and kernel 2.6.
>>
>> We know that currently, the latest version is 4.4 and the version
>> number updates quickly. So, where can I find the core of IO
>> architecture, page cache, block layer and ... for the most stable
>> architecture and not the version number?
>>
>>
>> Regards,
>> Mahmood
>>
>
> Man, it's huge and linux has evolved into a giant jump table these
> days.  I started programming on it in the 2.2 days and it was fairly
> sophisticated them.  You could start
> with reviewing what's in the /kernel directory.  For I/O study the bio
> architecture.  FOr block layer start in drivers/block.
>
> Your best bet is to clone it, get yourself a good kernel debugger to
> step through code and explore how things work.
>
> start by cloning it so you have your own copy.  Download and install
> git then clone Linus' tree.
>
> git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>
> Then you can also get the linux-stable tree which has all the stable
> versions of Linux
>
> git clone
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
>
> if you need a good kernel debugger, try this one
>
> http://jeffmerkey.github.io

thats http://jeffmerkey.github.io/linux



>
> Jeff
>