Hi Jiri, I believe this bug is fixed with this change: d39f8fb4b7776dcb09ec3bf7a321547083078ee3 mm: make DEFERRED_STRUCT_PAGE_INIT explicitly depend on SPARSEMEM I am not able to reproduce this problem on x86-32. Pavel On 8/30/18 10:35 AM, Pavel Tatashin wrote: > Thank you Jiri, I am studying it. > > Pavel > > On 8/24/18 3:44 AM, Jiri Slaby wrote: >> pasha.tatashin@xxxxxxxxxx -> pavel.tatashin@xxxxxxxxxxxxx >> >> due to >> 550 5.1.1 Unknown recipient address. >> >> >> On 08/24/2018, 09:32 AM, Jiri Slaby wrote: >>> On 06/19/2018, 09:56 PM, Pavel Tatashin wrote: >>>> On Tue, Jun 19, 2018 at 9:50 AM Pavel Tatashin >>>> <pasha.tatashin@xxxxxxxxxx> wrote: >>>>> >>>>> On Sat, Jun 16, 2018 at 4:04 AM Jiri Slaby <jslaby@xxxxxxx> wrote: >>>>>> >>>>>> On 11/21/2017, 08:24 AM, Michal Hocko wrote: >>>>>>> On Thu 16-11-17 20:46:01, Pavel Tatashin wrote: >>>>>>>> There is no need to have ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT, >>>>>>>> as all the page initialization code is in common code. >>>>>>>> >>>>>>>> Also, there is no need to depend on MEMORY_HOTPLUG, as initialization code >>>>>>>> does not really use hotplug memory functionality. So, we can remove this >>>>>>>> requirement as well. >>>>>>>> >>>>>>>> This patch allows to use deferred struct page initialization on all >>>>>>>> platforms with memblock allocator. >>>>>>>> >>>>>>>> Tested on x86, arm64, and sparc. Also, verified that code compiles on >>>>>>>> PPC with CONFIG_MEMORY_HOTPLUG disabled. >>>>>>> >>>>>>> There is slight risk that we will encounter corner cases on some >>>>>>> architectures with weird memory layout/topology >>>>>> >>>>>> Which x86_32-pae seems to be. Many bad page state errors are emitted >>>>>> during boot when this patch is applied: >>>>> >>>>> Hi Jiri, >>>>> >>>>> Thank you for reporting this bug. >>>>> >>>>> Because 32-bit systems are limited in the maximum amount of physical >>>>> memory, they don't need deferred struct pages. So, we can add depends >>>>> on 64BIT to DEFERRED_STRUCT_PAGE_INIT in mm/Kconfig. >>>>> >>>>> However, before we do this, I want to try reproducing this problem and >>>>> root cause it, as it might expose a general problem that is not 32-bit >>>>> specific. >>>> >>>> Hi Jiri, >>>> >>>> Could you please attach your config and full qemu arguments that you >>>> used to reproduce this bug. >>> >>> Hi, >>> >>> I seem I never replied. Attaching .config and the qemu cmdline: >>> $ qemu-kvm -m 2000 -hda /dev/null -kernel bzImage >>> >>> "-m 2000" is important to reproduce. >>> >>> If I disable CONFIG_DEFERRED_STRUCT_PAGE_INIT (which the patch allowed >>> to enable), the error goes away, of course. >>> >>> thanks, >>> >> >>
