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| author |   Hans Westgaard Ry <hans.westgaard.ry@oracle.com> | 2020-01-15 14:43:38 +0200 |
|---|---|---|
| committer |   Leon Romanovsky <leonro@mellanox.com> | 2020-01-16 16:15:25 +0200 |
| commit | c4c86abb3f9fb3d5bc113fb996298a30ec63e07b (patch) | |
| tree | 0ddcab9dcd5cca8eb1cc6656e353b8dc6c3efbe6 /net | |
| parent | RDMA/mlx5: Fix handling of IOVA != user_va in ODP paths (diff) | |
| download | linux-dev-c4c86abb3f9fb3d5bc113fb996298a30ec63e07b.tar.xz linux-dev-c4c86abb3f9fb3d5bc113fb996298a30ec63e07b.zip | |
net/rds: Detect need of On-Demand-Paging memory registration
Add code to check if memory intended for RDMA is FS-DAX-memory. RDS
will fail with error code EOPNOTSUPP if FS-DAX-memory is detected.
Signed-off-by: Hans Westgaard Ry <hans.westgaard.ry@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/rds/rdma.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/rds/rdma.c b/net/rds/rdma.c index 916f5ec373d8..eb23c38ce2b3 100644 --- a/net/rds/rdma.c +++ b/net/rds/rdma.c @@ -156,11 +156,13 @@ void rds_rdma_drop_keys(struct rds_sock *rs) static int rds_pin_pages(unsigned long user_addr, unsigned int nr_pages, struct page **pages, int write) { + unsigned int gup_flags = FOLL_LONGTERM; int ret; - ret = get_user_pages_fast(user_addr, nr_pages, write ? FOLL_WRITE : 0, - pages); + if (write) + gup_flags |= FOLL_WRITE; + ret = get_user_pages_fast(user_addr, nr_pages, gup_flags, pages); if (ret >= 0 && ret < nr_pages) { while (ret--) put_page(pages[ret]); |