The patch titled Subject: IB/core: disable memory registration of fileystem-dax vmas has been added to the -mm tree. Its filename is ib-core-disable-memory-registration-of-fileystem-dax-vmas.patch
This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/ib-core-disable-memory-registration... and later at http://ozlabs.org/~akpm/mmotm/broken-out/ib-core-disable-memory-registration...
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------------------------------------------------------ From: Dan Williams dan.j.williams@intel.com Subject: IB/core: disable memory registration of fileystem-dax vmas
Until there is a solution to the dma-to-dax vs truncate problem it is not safe to allow RDMA to create long standing memory registrations against filesytem-dax vmas.
Link: http://lkml.kernel.org/r/151068941011.7446.7766030590347262502.stgit@dwillia... Fixes: 3565fce3a659 ("mm, x86: get_user_pages() for dax mappings") Signed-off-by: Dan Williams dan.j.williams@intel.com Reported-by: Christoph Hellwig hch@lst.de Reviewed-by: Christoph Hellwig hch@lst.de Cc: Sean Hefty sean.hefty@intel.com Cc: Doug Ledford dledford@redhat.com Cc: Hal Rosenstock hal.rosenstock@gmail.com Cc: Jeff Moyer jmoyer@redhat.com Cc: Ross Zwisler ross.zwisler@linux.intel.com Cc: Jason Gunthorpe jgunthorpe@obsidianresearch.com Cc: Inki Dae inki.dae@samsung.com Cc: Jan Kara jack@suse.cz Cc: Joonyoung Shim jy0922.shim@samsung.com Cc: Kyungmin Park kyungmin.park@samsung.com Cc: Mauro Carvalho Chehab mchehab@kernel.org Cc: Mel Gorman mgorman@suse.de Cc: Seung-Woo Kim sw0312.kim@samsung.com Cc: Vlastimil Babka vbabka@suse.cz Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---
drivers/infiniband/core/umem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN drivers/infiniband/core/umem.c~ib-core-disable-memory-registration-of-fileystem-dax-vmas drivers/infiniband/core/umem.c --- a/drivers/infiniband/core/umem.c~ib-core-disable-memory-registration-of-fileystem-dax-vmas +++ a/drivers/infiniband/core/umem.c @@ -191,7 +191,7 @@ struct ib_umem *ib_umem_get(struct ib_uc sg_list_start = umem->sg_head.sgl;
while (npages) { - ret = get_user_pages(cur_base, + ret = get_user_pages_longterm(cur_base, min_t(unsigned long, npages, PAGE_SIZE / sizeof (struct page *)), gup_flags, page_list, vma_list); _
Patches currently in -mm which might be from dan.j.williams@intel.com are
mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages.patch mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3.patch mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write.patch mm-replace-pud_write-with-pud_access_permitted-in-fault-gup-paths.patch mm-replace-pud_write-with-pud_access_permitted-in-fault-gup-paths-v3.patch mm-replace-pmd_write-with-pmd_access_permitted-in-fault-gup-paths.patch mm-replace-pte_write-with-pte_access_permitted-in-fault-gup-paths.patch mm-hugetlbfs-introduce-split-to-vm_operations_struct.patch device-dax-implement-split-to-catch-invalid-munmap-attempts.patch mm-introduce-get_user_pages_longterm.patch mm-fail-get_vaddr_frames-for-filesystem-dax-mappings.patch v4l2-disable-filesystem-dax-mapping-support.patch ib-core-disable-memory-registration-of-fileystem-dax-vmas.patch