Understand I/O path in linux kernel

jitendra kumar khasdev jkhasdev at gmail.com
Sat May 27 02:10:41 EDT 2017

Hi All,

I am looking to understand I/O path in linux kernel. Here is following
things I have tried to understand it,

   1. try to understand vfs_write
   2. then move into fs specific write call
   3. I thought then after the call goes to I/O scheduler.
   4. then low-level device driver eg. SCSI, ide
   5. these drivers read/write sectors.

These are above I/O path I understood at a very high level. Please correct
me if somewhere I misunderstood.

I want to get an understanding of how blocks get read and write from a
disk. Please suggest me something that will help me to understand and
visualize data path in linux kernel.

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