> On Sep 24, 2024, at 14:10, Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx> wrote: > > In copy_pte_range(), we may modify the src_pte entry after holding the > src_ptl, so convert it to using pte_offset_map_rw_nolock(). Since we > already hold the exclusive mmap_lock, and the copy_pte_range() and > retract_page_tables() are using vma->anon_vma to be exclusive, so the PTE > page is stable, there is no need to get pmdval and do pmd_same() check. > > Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx> Reviewed-by: Muchun Song <muchun.song@xxxxxxxxx>
