On 04/09/2018 07:10 AM, Jia-Ju Bai wrote: > dccp_init() is never called in atomic context. > This function is only set as a parameter of module_init(). > > Despite never getting called from atomic context, > dccp_init() calls __get_free_pages() with GFP_ATOMIC, > which waits busily for allocation.
What do you mean by "waits busily" ? GFP_ATOMIC does not sleep, does not wait. > GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL, > to avoid busy waiting and improve the possibility of sucessful allocation. > > This is found by a static analysis tool named DCNS written by myself. > And I also manually check it. > > Signed-off-by: Jia-Ju Bai <baijiaju1...@gmail.com> > ---