diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2049-mm-hmm.c-support-automatic-NUMA-balancing.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2049-mm-hmm.c-support-automatic-NUMA-balancing.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2049-mm-hmm.c-support-automatic-NUMA-balancing.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2049-mm-hmm.c-support-automatic-NUMA-balancing.patch new file mode 100644 index 00000000..089a333f --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2049-mm-hmm.c-support-automatic-NUMA-balancing.patch @@ -0,0 +1,43 @@ +From 56af71944396f0376a44b8ea94c896cba63efc7d Mon Sep 17 00:00:00 2001 +From: Philip Yang <Philip.Yang@amd.com> +Date: Tue, 28 May 2019 15:28:58 -0400 +Subject: [PATCH 2049/2940] mm/hmm.c: support automatic NUMA balancing +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +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. + +Link: http://lkml.kernel.org/r/20190510195258.9930-2-Felix.Kuehling@amd.com +Signed-off-by: Philip Yang <Philip.Yang@amd.com> +Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> +Reviewed-by: Jérôme Glisse <jglisse@redhat.com> +Cc: Alex Deucher <alex.deucher@amd.com> +Cc: Dave Airlie <airlied@gmail.com> +Signed-off-by: Andrew Morton <akpm@linux-foundation.org> +--- + mm/hmm.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/mm/hmm.c b/mm/hmm.c +index c5cb352f5276..4609bde6997e 100644 +--- a/mm/hmm.c ++++ b/mm/hmm.c +@@ -512,7 +512,7 @@ static int hmm_vma_handle_pmd(struct mm_walk *walk, + + static inline uint64_t pte_to_hmm_pfn_flags(struct hmm_range *range, pte_t pte) + { +- if (pte_none(pte) || !pte_present(pte)) ++ if (pte_none(pte) || !pte_present(pte) || pte_protnone(pte)) + return 0; + return pte_write(pte) ? range->flags[HMM_PFN_VALID] | + range->flags[HMM_PFN_WRITE] : +-- +2.17.1 + |