Thanks for your suggestion, I think I will be able to complete the modification and test soon. Matthew Wilcox <willy@xxxxxxxxxxxxx> 于2023年12月4日周一 21:36写道： > > On Mon, Dec 04, 2023 at 10:22:58AM +0800, John Sanpe wrote: > > Replace the internal table lookup algorithm with the hweight > > library, which has instruction set acceleration. > > This is undeniably better, but why stop here? Instead of working one > byte at a time, you could work an entire word at a time and use > hweight_long(). > > Also, if you're in the mood for a second patch, free_bit[] is clearly > an open-coding of ffz().
