On Fri 11-08-17 11:24:55, Pasha Tatashin wrote: [...] > >>In this patchset we will stop zeroing struct page memory during allocation. > >>Therefore, this bug must be fixed in order to avoid random assert failures > >>caused by CONFIG_DEBUG_VM_PGFLAGS triggers. > >> > >>The fix is to reserve memory from the first existing PFN. > > > >Hmm, I assume this is a result of some assert triggering, right? Which > >one? Why don't we need the same treatment for other than x86 arch? > > Correct, the pgflags asserts were triggered when we were setting reserved > flags to struct page for PFN 0 in which was never initialized through > __init_single_page(). The reason they were triggered is because we set all > uninitialized memory to ones in one of the debug patches.
And why don't we need the same treatment for other architectures? -- Michal Hocko SUSE Labs
