On Mon, Nov 04, 2019 at 07:29:40PM +0800, Shaokun Zhang wrote: > From: Yang Guo <guoyang2@xxxxxxxxxx> > > percpu_counter_compare will be called by xfs_mod_icount/ifree to check > whether the counter less than 0 and it is a expensive function. > let's check it only when delta < 0, it will be good for xfs's performance. How much overhead do you see? In the end the compare is just a debug check, so if it actually shows up we should remove it entirely.
