4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Dan Williams <[email protected]> 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.st...@dwillia2-desk3.amr.corp.intel.com Fixes: 3565fce3a659 ("mm, x86: get_user_pages() for dax mappings") Signed-off-by: Dan Williams <[email protected]> Reported-by: Christoph Hellwig <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> Acked-by: Jason Gunthorpe <[email protected]> Acked-by: Doug Ledford <[email protected]> Cc: Sean Hefty <[email protected]> Cc: Hal Rosenstock <[email protected]> Cc: Jeff Moyer <[email protected]> Cc: Ross Zwisler <[email protected]> Cc: Inki Dae <[email protected]> Cc: Jan Kara <[email protected]> Cc: Joonyoung Shim <[email protected]> Cc: Kyungmin Park <[email protected]> Cc: Mauro Carvalho Chehab <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Seung-Woo Kim <[email protected]> Cc: Vlastimil Babka <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/infiniband/core/umem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/infiniband/core/umem.c +++ b/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);
