On Mon, 21 May 2018, Song Liu wrote: > khugepaged_enter_vma_merge() is using a different approach to check > whether a vma is valid for khugepaged_enter(): > > if (!vma->anon_vma) > /* > * Not yet faulted in so we will register later in the > * page fault if needed. > */ > return 0; > if (vma->vm_ops || (vm_flags & VM_NO_KHUGEPAGED)) > /* khugepaged not yet working on file or special mappings */ > return 0; > > This check has some problems. One of the obvious problems is that > it doesn't check shmem_file(), so that vma backed with shmem files > will not call khugepaged_enter(). > > This patch fixes these problems by reusing hugepage_vma_check() in > khugepaged_enter_vma_merge(). > > Signed-off-by: Song Liu <songliubraving@xxxxxx> Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
