Messages in this thread | | | Date | Tue, 28 Mar 2017 11:00:49 +0200 (CEST) | From | Miroslav Benes <> | Subject | Re: [PATCH] reduce the time of finding symbols for module |
| |
Hi,
On Tue, 28 Mar 2017, Zhou Chengming wrote:
> It's reported that the time of insmoding a klp.ko for one of our > out-tree modules is too long. > > ~ time sudo insmod klp.ko > real 0m23.799s > user 0m0.036s > sys 0m21.256s
Is this stable through several (>=10) runs? 23 seconds are really suspicious. Yes, there is a linear search through all the kallsyms in kallsyms_on_each_symbol(), but there are something like 70k symbols on my machine (that is, way less than 1M). 23 seconds are somewhat unexpected.
If it is a problem, can we fix kallsyms_on_each_symbol() and replace the linear search with something better? All users would benefit...
Thanks, Miroslav
| |