Commit 5f1d43de authored by Dan Williams's avatar Dan Williams Committed by Linus Torvalds

IB/core: disable memory registration of filesystem-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@dwillia2-desk3.amr.corp.intel.com
Fixes: 3565fce3 ("mm, x86: get_user_pages() for dax mappings")
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
Reported-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Acked-by: default avatarJason Gunthorpe <jgg@mellanox.com>
Acked-by: default avatarDoug Ledford <dledford@redhat.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b70131de
...@@ -191,7 +191,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, ...@@ -191,7 +191,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
sg_list_start = umem->sg_head.sgl; sg_list_start = umem->sg_head.sgl;
while (npages) { while (npages) {
ret = get_user_pages(cur_base, ret = get_user_pages_longterm(cur_base,
min_t(unsigned long, npages, min_t(unsigned long, npages,
PAGE_SIZE / sizeof (struct page *)), PAGE_SIZE / sizeof (struct page *)),
gup_flags, page_list, vma_list); gup_flags, page_list, vma_list);
......
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