net/rds: Use prefetch for On-Demand-Paging MR (b2dfc676) · Commits · 戴 / test

Try prefetching pages when using On-Demand-Paging MR using ib_advise_mr. Signed-off-by:

net/rds/ib_rdma.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}