[PATCH 1/2] mm/hmm: support automatic NUMA balancing

Kuehling, Felix Felix.Kuehling at amd.com
Tue May 14 21:14:42 UTC 2019

On 2019-05-13 5:27 p.m., Andrew Morton wrote:
> [CAUTION: External Email]
> On Fri, 10 May 2019 19:53:23 +0000 "Kuehling, Felix" <Felix.Kuehling at amd.com> wrote:
>> From: Philip Yang <Philip.Yang at amd.com>
>> While the page is migrating by NUMA balancing, HMM failed to detect this
>> condition and still return the old page. Application will use the new
>> page migrated, but driver pass the old page physical address to GPU,
>> this crash the application later.
>> Use pte_protnone(pte) to return this condition and then hmm_vma_do_fault
>> will allocate new page.
>> Signed-off-by: Philip Yang <Philip.Yang at amd.com>
> This should have included your signed-off-by:, since you were on the
> patch delivery path.  I'll make that change to my copy of the patch,
> OK?
Yes. Thanks!

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