On Tue 10-09-19 07:53:17, Dan Williams wrote: > On Tue, Sep 10, 2019 at 7:01 AM Michal Hocko <mhocko@xxxxxxxxxx> wrote: > > > > On Fri 06-09-19 08:09:52, Toshiki Fukasawa wrote: > > [...] > > > @@ -5856,8 +5855,6 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone, > > > if (!altmap) > > > return; > > > > > > - if (start_pfn == altmap->base_pfn) > > > - start_pfn += altmap->reserve; > > > end_pfn = altmap->base_pfn + vmem_altmap_offset(altmap); > > > > Who is actually setting reserve? This is is something really impossible > > to grep for in the kernle and git grep on altmap->reserve doesn't show > > anything AFAICS. > > Yes, it's difficult to grep, here is the use in the nvdimm case: > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/nvdimm/pfn_devs.c#n600 Thanks! I am still not sure what the proper fix is but this is a useful pointer. -- Michal Hocko SUSE Labs
