On 21 May 2019, Coly Li uttered the following: > Also I try to analyze the assemble code of bcache, just find out the > generated assembly code between gcc9 and gcc7 is quite different. For > gcc9 there is a XXXX.cold part. So far I can not tell where the problem > is from yet. This is hot/cold partitioning. You can turn it off with -fno-reorder-blocks-and-partition and see if that helps things (and if it doesn't, it should at least make stuff easier to compare).
