On Tue, Dec 18, 2018 at 02:35:57PM -0800, Mike Kravetz wrote: > Instead of writing the required complicated code for this rare > occurrence, just eliminate the race. i_mmap_rwsem is now held in read > mode for the duration of page fault processing. Hold i_mmap_rwsem > longer in truncation and hold punch code to cover the call to > remove_inode_hugepages.
One of remove_inode_hugepages() callers is noticeably missing -- hugetlbfs_evict_inode(). Why? It at least deserves a comment on why the lock rule doesn't apply to it. -- Kirill A. Shutemov
