On Fri, Jul 22, 2022 at 03:56:32PM -0700, Ralph Campbell wrote:
> If hmm_range_fault() is called with the HMM_PFN_REQ_FAULT flag and a
> device private PTE is found, the hmm_range::dev_private_owner page is
> used to determine if the device private page should not be faulted in.
> However, if the device private page is not owned by the caller,
> hmm_range_fault() returns an error instead of calling migrate_to_ram()
> to fault in the page.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 76612d6ce4cc ("mm/hmm: reorganize how !pte_present is handled in hmm_vma_handle_pte()")
> Signed-off-by: Ralph Campbell <rcampbell@xxxxxxxxxx>
> Reported-by: Felix Kuehling <felix.kuehling@xxxxxxx>
> ---
> mm/hmm.c | 3 +++
> 1 file changed, 3 insertions(+)
Should we have a test for this ?
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Jason
