On Mon, 16 Jan 2023, Jiri Olsa wrote: > From: Zhen Lei <thunder.leizhen@xxxxxxxxxx> > > Currently we traverse all symbols of all modules to find the specified > function for the specified module. But in reality, we just need to find > the given module and then traverse all the symbols in it. > > Let's add a new parameter 'const char *modname' to function > module_kallsyms_on_each_symbol(), then we can compare the module names > directly in this function and call hook 'fn' after matching. If 'modname' > is NULL, the symbols of all modules are still traversed for compatibility > with other usage cases. > > Phase1: mod1-->mod2..(subsequent modules do not need to be compared) > | > Phase2: -->f1-->f2-->f3 > > Assuming that there are m modules, each module has n symbols on average, > then the time complexity is reduced from O(m * n) to O(m) + O(n). > > Reviewed-by: Petr Mladek <pmladek@xxxxxxxx> > Acked-by: Song Liu <song@xxxxxxxxxx> > Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx> > Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx> Acked-by: Miroslav Benes <mbenes@xxxxxxx> M
