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net/rds: Use prefetch for On-Demand-Paging MR 

Try prefetching pages when using On-Demand-Paging MR using
ib_advise_mr.

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>
This commit is contained in:
Hans Westgaard Ry 2020-01-15 14:43:40 +02:00 committed by Leon Romanovsky
parent 2eafa1746f
commit b2dfc6765e
1 changed files with 9 additions and 0 deletions
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9
net/rds/ib_rdma.c
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@ -575,6 +575,7 @@ void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents,
(IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_READ |
IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_ATOMIC |
IB_ACCESS_ON_DEMAND);
struct ib_sge sge = {};
struct ib_mr *ib_mr;
if (!rds_ibdev->odp_capable) {
@ -602,6 +603,14 @@ void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents,
}
ibmr->u.mr = ib_mr;
ibmr->odp = 1;
sge.addr = virt_addr;
sge.length = length;
sge.lkey = ib_mr->lkey;
ib_advise_mr(rds_ibdev->pd,
IB_UVERBS_ADVISE_MR_ADVICE_PREFETCH_WRITE,
IB_UVERBS_ADVISE_MR_FLAG_FLUSH, &sge, 1);
return ibmr;
}