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| author |   Bart Van Assche <bvanassche@acm.org> | 2019-01-22 10:25:20 -0800 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2019-01-30 15:04:16 -0700 |
| commit | 0b5cb3300ae59ed7e93b465dfa2384a6a4df8eb4 (patch) | |
| tree | ba66ceac2b52f23fd3e9665d165dd31af9220a68 /drivers/infiniband/ulp/srp/ib_srp.c | |
| parent | IB/{hfi1, qib, rvt} Cleanup open coded sge usage (diff) | |
| download | linux-dev-0b5cb3300ae59ed7e93b465dfa2384a6a4df8eb4.tar.xz linux-dev-0b5cb3300ae59ed7e93b465dfa2384a6a4df8eb4.zip | |
RDMA/srp: Increase max_segment_size
The default behavior of the SCSI core is to set the block layer request
queue parameter max_segment_size to 64 KB. That means that elements of
scatterlists are limited to 64 KB. Since RDMA adapters support larger
sizes, increase max_segment_size for the SRP initiator.
Notes:
- The SCSI max_segment_size parameter was introduced in kernel v5.0. See
also commit 50c2e9107f17 ("scsi: introduce a max_segment_size
host_template parameters").
- Some other block drivers already set max_segment_size to UINT_MAX,
e.g. nbd and rbd.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/ulp/srp/ib_srp.c')
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 0f855294ff3f..29fe46dbdbf1 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -3823,6 +3823,7 @@ static ssize_t srp_create_target(struct device *dev, target_host->max_id = 1; target_host->max_lun = -1LL; target_host->max_cmd_len = sizeof ((struct srp_cmd *) (void *) 0L)->cdb; + target_host->max_segment_size = ib_dma_max_seg_size(ibdev); target = host_to_target(target_host); |