| From | Kamal Mostafa <> | Subject | [PATCH 3.19.y-ckt 058/160] IB/srp: Fix possible send queue overflow | Date | Tue, 19 Jan 2016 17:05:36 -0800 |
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3.19.8-ckt13 -stable review patch. If anyone has any objections, please let me know.
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From: Sagi Grimberg <sagig@mellanox.com>
commit 09c0c0bea500a9ad362589990ee316c9b2482f44 upstream.
When using work request based memory registration (fast_reg) we must reserve SQ entries for registration and invalidation in addition to send operations. Each IO consumes 3 SQ entries (registration, send, invalidation) so we need to allocate 3x larger send-queue instead of 2x.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Doug Ledford <dledford@redhat.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/infiniband/ulp/srp/ib_srp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 3dace1d..2bfa995 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -496,7 +496,7 @@ static int srp_create_ch_ib(struct srp_rdma_ch *ch) struct ib_qp *qp; struct ib_fmr_pool *fmr_pool = NULL; struct srp_fr_pool *fr_pool = NULL; - const int m = 1 + dev->use_fast_reg; + const int m = dev->use_fast_reg ? 3 : 1; int ret; init_attr = kzalloc(sizeof *init_attr, GFP_KERNEL); -- 1.9.1
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