diff options
| author |   Bart Van Assche <bart.vanassche@sandisk.com> | 2016-07-21 13:03:47 -0700 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2016-08-02 12:02:41 -0400 |
| commit | 30c6d8773de06878f920666d8c945f81cb2081b3 (patch) | |
| tree | 335bf8bf0f37814934ed3fa60e8d9ba01e8a35d5 /drivers/infiniband/ulp/srpt/ib_srpt.h | |
| parent | IB/core, RDMA RW API: Do not exceed QP SGE send limit (diff) | |
| download | linux-dev-30c6d8773de06878f920666d8c945f81cb2081b3.tar.xz linux-dev-30c6d8773de06878f920666d8c945f81cb2081b3.zip | |
IB/srpt: Limit the number of SG elements per work request
Limit the number of SG elements per work request to what the HCA
and the queue pair support.
Fixes: 34693573fde0 ("IB/srpt: Reduce QP buffer size")
Reported-by: Parav Pandit <pandit.parav@gmail.com>
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Steve Wise <swise@opengridcomputing.com>
Cc: Parav Pandit <pandit.parav@gmail.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: <stable@vger.kernel.org> #v4.7+
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/ulp/srpt/ib_srpt.h')
| -rw-r--r-- | drivers/infiniband/ulp/srpt/ib_srpt.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.h b/drivers/infiniband/ulp/srpt/ib_srpt.h index 389030487da7..581878782854 100644 --- a/drivers/infiniband/ulp/srpt/ib_srpt.h +++ b/drivers/infiniband/ulp/srpt/ib_srpt.h @@ -106,7 +106,11 @@ enum { SRP_LOGIN_RSP_MULTICHAN_MAINTAINED = 0x2, SRPT_DEF_SG_TABLESIZE = 128, - SRPT_DEF_SG_PER_WQE = 16, + /* + * An experimentally determined value that avoids that QP creation + * fails due to "swiotlb buffer is full" on systems using the swiotlb. + */ + SRPT_MAX_SG_PER_WQE = 16, MIN_SRPT_SQ_SIZE = 16, DEF_SRPT_SQ_SIZE = 4096, |