On 08/12/2013 02:06 PM, Yinghai Lu wrote: > > should use BRK for safe if the buffer is not too big. need bootloader > will have kernel run-time size range in same node ram. > The bootloader typically won't know. >> >> Again, how much memory are we talking about here? > > page tables, buffer for slit table, buffer for double > memblock.reserved, override acpi tables. > > looks like it is needing several mega bytes, esp someone using 4k page > mapping for debug purpose. > We need to set a careful limit, then. "Several megabytes" could be a problem causing a boot failure on a small memory machine if we extend the BRK too much... obviously, a too-small BRK can fail on large systems. -hpa -- 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>