Return-Path: Received: from mail-lb0-f177.google.com ([209.85.217.177]:33405 "EHLO mail-lb0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751603AbbEHPbV (ORCPT ); Fri, 8 May 2015 11:31:21 -0400 Received: by lbbzk7 with SMTP id zk7so55759690lbb.0 for ; Fri, 08 May 2015 08:31:20 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <554B3FFA.5020101@dev.mellanox.co.il> References: <20150504174626.3483.97639.stgit@manet.1015granger.net> <20150504175808.3483.57643.stgit@manet.1015granger.net> <554B3FFA.5020101@dev.mellanox.co.il> Date: Fri, 8 May 2015 21:01:20 +0530 Message-ID: Subject: Re: [PATCH v1 09/14] xprtrdma: Remove unused LOCAL_INV recovery logic From: Devesh Sharma To: Sagi Grimberg Cc: Chuck Lever , linux-rdma@vger.kernel.org, Linux NFS Mailing List Content-Type: text/plain; charset=UTF-8 Sender: linux-nfs-owner@vger.kernel.org List-ID: Reviewed-bt: Devesh Sharma On Thu, May 7, 2015 at 4:05 PM, Sagi Grimberg wrote: > On 5/4/2015 8:58 PM, Chuck Lever wrote: >> >> Clean up: Remove functions no longer used to recover broken FRMRs. >> >> Signed-off-by: Chuck Lever >> --- >> net/sunrpc/xprtrdma/verbs.c | 109 >> ------------------------------------------- >> 1 file changed, 109 deletions(-) >> >> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c >> index 5226161..5120a8e 100644 >> --- a/net/sunrpc/xprtrdma/verbs.c >> +++ b/net/sunrpc/xprtrdma/verbs.c >> @@ -1210,33 +1210,6 @@ rpcrdma_put_mw(struct rpcrdma_xprt *r_xprt, struct >> rpcrdma_mw *mw) >> spin_unlock_irqrestore(&buf->rb_lock, flags); >> } >> >> -/* "*mw" can be NULL when rpcrdma_buffer_get_mrs() fails, leaving >> - * some req segments uninitialized. >> - */ >> -static void >> -rpcrdma_buffer_put_mr(struct rpcrdma_mw **mw, struct rpcrdma_buffer *buf) >> -{ >> - if (*mw) { >> - list_add_tail(&(*mw)->mw_list, &buf->rb_mws); >> - *mw = NULL; >> - } >> -} >> - >> -/* Cycle mw's back in reverse order, and "spin" them. >> - * This delays and scrambles reuse as much as possible. >> - */ >> -static void >> -rpcrdma_buffer_put_mrs(struct rpcrdma_req *req, struct rpcrdma_buffer >> *buf) >> -{ >> - struct rpcrdma_mr_seg *seg = req->rl_segments; >> - struct rpcrdma_mr_seg *seg1 = seg; >> - int i; >> - >> - for (i = 1, seg++; i < RPCRDMA_MAX_SEGS; seg++, i++) >> - rpcrdma_buffer_put_mr(&seg->rl_mw, buf); >> - rpcrdma_buffer_put_mr(&seg1->rl_mw, buf); >> -} >> - >> static void >> rpcrdma_buffer_put_sendbuf(struct rpcrdma_req *req, struct >> rpcrdma_buffer *buf) >> { >> @@ -1249,88 +1222,6 @@ rpcrdma_buffer_put_sendbuf(struct rpcrdma_req *req, >> struct rpcrdma_buffer *buf) >> } >> } >> >> -/* rpcrdma_unmap_one() was already done during deregistration. >> - * Redo only the ib_post_send(). >> - */ >> -static void >> -rpcrdma_retry_local_inv(struct rpcrdma_mw *r, struct rpcrdma_ia *ia) >> -{ >> - struct rpcrdma_xprt *r_xprt = >> - container_of(ia, struct rpcrdma_xprt, >> rx_ia); >> - struct ib_send_wr invalidate_wr, *bad_wr; >> - int rc; >> - >> - dprintk("RPC: %s: FRMR %p is stale\n", __func__, r); >> - >> - /* When this FRMR is re-inserted into rb_mws, it is no longer >> stale */ >> - r->r.frmr.fr_state = FRMR_IS_INVALID; >> - >> - memset(&invalidate_wr, 0, sizeof(invalidate_wr)); >> - invalidate_wr.wr_id = (unsigned long)(void *)r; >> - invalidate_wr.opcode = IB_WR_LOCAL_INV; >> - invalidate_wr.ex.invalidate_rkey = r->r.frmr.fr_mr->rkey; >> - DECR_CQCOUNT(&r_xprt->rx_ep); >> - >> - dprintk("RPC: %s: frmr %p invalidating rkey %08x\n", >> - __func__, r, r->r.frmr.fr_mr->rkey); >> - >> - read_lock(&ia->ri_qplock); >> - rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr); >> - read_unlock(&ia->ri_qplock); >> - if (rc) { >> - /* Force rpcrdma_buffer_get() to retry */ >> - r->r.frmr.fr_state = FRMR_IS_STALE; >> - dprintk("RPC: %s: ib_post_send failed, %i\n", >> - __func__, rc); >> - } >> -} >> - >> -static void >> -rpcrdma_retry_flushed_linv(struct list_head *stale, >> - struct rpcrdma_buffer *buf) >> -{ >> - struct rpcrdma_ia *ia = rdmab_to_ia(buf); >> - struct list_head *pos; >> - struct rpcrdma_mw *r; >> - unsigned long flags; >> - >> - list_for_each(pos, stale) { >> - r = list_entry(pos, struct rpcrdma_mw, mw_list); >> - rpcrdma_retry_local_inv(r, ia); >> - } >> - >> - spin_lock_irqsave(&buf->rb_lock, flags); >> - list_splice_tail(stale, &buf->rb_mws); >> - spin_unlock_irqrestore(&buf->rb_lock, flags); >> -} >> - >> -static struct rpcrdma_req * >> -rpcrdma_buffer_get_frmrs(struct rpcrdma_req *req, struct rpcrdma_buffer >> *buf, >> - struct list_head *stale) >> -{ >> - struct rpcrdma_mw *r; >> - int i; >> - >> - i = RPCRDMA_MAX_SEGS - 1; >> - while (!list_empty(&buf->rb_mws)) { >> - r = list_entry(buf->rb_mws.next, >> - struct rpcrdma_mw, mw_list); >> - list_del(&r->mw_list); >> - if (r->r.frmr.fr_state == FRMR_IS_STALE) { >> - list_add(&r->mw_list, stale); >> - continue; >> - } >> - req->rl_segments[i].rl_mw = r; >> - if (unlikely(i-- == 0)) >> - return req; /* Success */ >> - } >> - >> - /* Not enough entries on rb_mws for this req */ >> - rpcrdma_buffer_put_sendbuf(req, buf); >> - rpcrdma_buffer_put_mrs(req, buf); >> - return NULL; >> -} >> - >> /* >> * Get a set of request/reply buffers. >> * >> > > Looks good, > > Reviewed-by: Sagi Grimberg > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- -Regards Devesh