searcing for the function calls submit_bio

Question

I am trying to intercept the submission of io requests in the submit_bio for a project I do in Linux.

I want to find the main function that calls submit_bio, to submit blocks.

I believe that there is a function that takes a page and submits the blocks in it.

I am searching for such a function in Linux kernel that takes a page to submit and submits the blocks in it using submit_bio.

Can anyone help me?

Thanks

Answer 1

You could either look at https://elixir.bootlin.com/linux/latest/A/ident/submit_bio and read the code around the references to submit_bio or use a tool like perf ( $(KERNEL_SRC_DIR)/tools/perf ) to get statistics on stacktraces. A simple tutorial to perf can be found here: https://perf.wiki.kernel.org/index.php/Tutorial