On Thu, May 5, 2016 at 4:24 PM, Oliver O'Halloran <ooh...@gmail.com> wrote: > The mm zone mechanism was traditionally used by arch specific code to > partition memory into allocation zones. However there are several zones > that are managed by the mm subsystem rather than the architecture. Most > architectures set the max PFN of these special zones to zero, however on > powerpc we set them to ~0ul. This, in conjunction with a bug in > free_area_init_nodes() results in all of system memory being placed > being placed in ZONE_DEVICE when enabled. Device memory cannot be used > for regular kernel memory allocations so this will cause a kernel panic at > boot. > > Given the planned addition of more mm managed zones (ZONE_CMA) we should > aim to be consistent with every other architecture and set the max PFN > for these zones to zero > > Signed-off-by: Oliver O'Halloran <ooh...@gmail.com> > --- >
Reviewed-by: Balbir Singh <bsinghar...@gmail.com> _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
