From 2ffc871a574daa760ef4f7750e0a36187a45754a Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Wed, 29 Jun 2016 13:54:08 -0400 Subject: [PATCH] xprtrdma: Release orphaned MRs immediately Instead of leaving orphaned MRs to be released when the transport is destroyed, release them immediately. The MR free list can now be replenished if it becomes exhausted. Signed-off-by: Chuck Lever Tested-by: Steve Wise Signed-off-by: Anna Schumaker --- net/sunrpc/xprtrdma/fmr_ops.c | 19 +++++++++++++------ net/sunrpc/xprtrdma/frwr_ops.c | 19 +++++++++++++------ 2 files changed, 26 insertions(+), 12 deletions(-) diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c index 758cd1a02249..6521dceff638 100644 --- a/net/sunrpc/xprtrdma/fmr_ops.c +++ b/net/sunrpc/xprtrdma/fmr_ops.c @@ -134,15 +134,22 @@ fmr_op_recover_mr(struct rpcrdma_mw *mw) /* ORDER: then DMA unmap */ ib_dma_unmap_sg(r_xprt->rx_ia.ri_device, mw->mw_sg, mw->mw_nents, mw->mw_dir); - if (rc) { - pr_err("rpcrdma: FMR reset status %d, %p orphaned\n", - rc, mw); - r_xprt->rx_stats.mrs_orphaned++; - return; - } + if (rc) + goto out_release; rpcrdma_put_mw(r_xprt, mw); r_xprt->rx_stats.mrs_recovered++; + return; + +out_release: + pr_err("rpcrdma: FMR reset failed (%d), %p released\n", rc, mw); + r_xprt->rx_stats.mrs_orphaned++; + + spin_lock(&r_xprt->rx_buf.rb_mwlock); + list_del(&mw->mw_all); + spin_unlock(&r_xprt->rx_buf.rb_mwlock); + + fmr_op_release_mr(mw); } static int diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index e77776bc5d59..f4c06c8ba622 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -177,15 +177,22 @@ frwr_op_recover_mr(struct rpcrdma_mw *mw) rc = __frwr_reset_mr(ia, mw); ib_dma_unmap_sg(ia->ri_device, mw->mw_sg, mw->mw_nents, mw->mw_dir); - if (rc) { - pr_err("rpcrdma: FRMR reset status %d, %p orphaned\n", - rc, mw); - r_xprt->rx_stats.mrs_orphaned++; - return; - } + if (rc) + goto out_release; rpcrdma_put_mw(r_xprt, mw); r_xprt->rx_stats.mrs_recovered++; + return; + +out_release: + pr_err("rpcrdma: FRMR reset failed %d, %p release\n", rc, mw); + r_xprt->rx_stats.mrs_orphaned++; + + spin_lock(&r_xprt->rx_buf.rb_mwlock); + list_del(&mw->mw_all); + spin_unlock(&r_xprt->rx_buf.rb_mwlock); + + frwr_op_release_mr(mw); } static int -- 2.20.1