On 11/17, Chris Metcalf wrote: > > On 11/17/2015 11:19 AM, Oleg Nesterov wrote: >> 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; >> 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(). > > The problem is that we are mapping a region of virtual address space that > the chip provides for setting up interrupt handlers (at 0xfc000000) but that > is above the TASK_SIZE cutoff, Ah, I didn't bother to read the comment in arch_setup_additional_pages(). Thanks for your explanation. 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>