Re: [PATCH] mm/cma: get nid from physical address

["Yajun Deng" <yajun.deng@linux.dev>]

May 16, 2024 at 6:03 PM, "Kefeng Wang" <wangkefeng.wang@huawei.com> wrote:



> 
> On 2024/5/16 17:17, Yajun Deng wrote:
> 
> > 
> > The nid passed to cma_declare_contiguous_nid() may be NUMA_NO_NODE,
> > 
> >  which is not the actual nid. To get the correct nid, we can get the nid
> > 
> >  from physical address.
> > 
> 
> Please check
> 
> https://lore.kernel.org/linux-riscv/47437c2b-5946-41c6-ad1b-cc03329eb230@huawei.com/
> 

Okay, thanks!
> > 
> > Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
> > 
> >  ---
> > 
> >  mm/cma.c | 1 +
> > 
> >  1 file changed, 1 insertion(+)
> > 
> >  diff --git a/mm/cma.c b/mm/cma.c
> > 
> >  index 3e9724716bad..be6cdde32944 100644
> > 
> >  --- a/mm/cma.c
> > 
> >  +++ b/mm/cma.c
> > 
> >  @@ -361,6 +361,7 @@ int __init cma_declare_contiguous_nid(phys_addr_t base,
> > 
> >  kmemleak_ignore_phys(addr);
> > 
> >  base = addr;
> > 
> >  }
> > 
> >  + nid = early_pfn_to_nid(PHYS_PFN(base));
> > 
> >  > ret = cma_init_reserved_mem(base, size, order_per_bit, name, res_cma);
> > 
> >  if (ret)
> >
>