I would like to be able to print the stack trace of a thread in the Linux kernel.
In details: I want to add code to specific functions (e.g. swap_writepage()
) that will print the complete stack trace of the thread where this function is being called. Something like this:
int swap_writepage(struct page *page, struct writeback_control *wbc)
{
/* code goes here to print stack trace */
int ret = 0;
if (try_to_free_swap(page)) {
unlock_page(page);
goto out;
}
if (frontswap_store(page) == 0) {
set_page_writeback(page);
unlock_page(page);
end_page_writeback(page);
goto out;
}
ret = __swap_writepage(page, wbc, end_swap_bio_write);
out:
return ret;
}
Linux kernel has very well known function called dump_stack()
here, which prints the content of the stack. Place it in your function according to see stack info.