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>
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@ -575,6 +575,7 @@ void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents,
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(IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_READ |
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IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_ATOMIC |
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IB_ACCESS_ON_DEMAND);
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struct ib_sge sge = {};
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struct ib_mr *ib_mr;
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if (!rds_ibdev->odp_capable) {
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@ -602,6 +603,14 @@ void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents,
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}
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ibmr->u.mr = ib_mr;
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ibmr->odp = 1;
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sge.addr = virt_addr;
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sge.length = length;
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sge.lkey = ib_mr->lkey;
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ib_advise_mr(rds_ibdev->pd,
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IB_UVERBS_ADVISE_MR_ADVICE_PREFETCH_WRITE,
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IB_UVERBS_ADVISE_MR_FLAG_FLUSH, &sge, 1);
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return ibmr;
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}
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