On 11/16, Piotr Kwapulinski wrote: > > @@ -1551,7 +1552,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr, > * MAP_FIXED may remove pages of mappings that intersects with > * requested mapping. Account for the pages it would unmap. > */ > - if (!(vm_flags & MAP_FIXED)) > + if (!(flags & MAP_FIXED)) > return -ENOMEM; Agree, "vm_flags & MAP_FIXED" makes no sense and just wrong... Can't we simply remove this check? Afaics it only helps to avoid count_vma_pages_range() in the unlikely case when may_expand_vm() fails. And without MAP_FIXED count_vma_pages_range() should be cheap, find_vma_intersection() should fail. And afaics arch/tile/mm/elf.c can use do_mmap(MAP_FIXED ...) rather than mmap_region(), it can be changed by a separate patch. In this case we can unexport mmap_region(). OTOH, I won't insist, this patch looks fine to me. Oleg. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>