From 00a6e639b58d23c0b6e36bb44b117afd2e245f52 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Fri, 23 Feb 2018 14:06:00 -0800 Subject: IB/core: disable memory registration of filesystem-dax vmas commit 5f1d43de54164dcfb9bfa542fcc92c1e1a1b6c1d upstream. 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@dwillia2-desk3.amr.corp.intel.com Fixes: 3565fce3a659 ("mm, x86: get_user_pages() for dax mappings") Signed-off-by: Dan Williams Reported-by: Christoph Hellwig Reviewed-by: Christoph Hellwig Acked-by: Jason Gunthorpe Acked-by: Doug Ledford Cc: Sean Hefty Cc: Hal Rosenstock Cc: Jeff Moyer Cc: Ross Zwisler Cc: Inki Dae Cc: Jan Kara Cc: Joonyoung Shim Cc: Kyungmin Park Cc: Mauro Carvalho Chehab Cc: Mel Gorman Cc: Seung-Woo Kim Cc: Vlastimil Babka Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/core/umem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index c22fde6207d1..8e973a2993a6 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -193,7 +193,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, 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); -- cgit v1.2.3