From: Chuck Lever <chuck.lever-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> To: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Subject: [PATCH v2 04/22] SUNRPC: Generalize the RPC buffer release API Date: Tue, 23 Aug 2016 13:52:36 -0400 [thread overview] Message-ID: <20160823175235.13038.20673.stgit@manet.1015granger.net> (raw) In-Reply-To: <20160823174402.13038.84561.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org> xprtrdma needs to allocate the Call and Reply buffers separately. TBH, the reliance on using a single buffer for the pair of XDR buffers is transport implementation-specific. Instead of passing just the rq_buffer into the buf_free method, pass the task structure and let buf_free take care of freeing both XDR buffers at once. There's a micro-optimization here. In the common case, both xprt_release and the transport's buf_free method were checking if rq_buffer was NULL. Now the check is done only once per RPC. Signed-off-by: Chuck Lever <chuck.lever-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> --- include/linux/sunrpc/sched.h | 2 +- include/linux/sunrpc/xprt.h | 2 +- net/sunrpc/sched.c | 10 ++++------ net/sunrpc/xprt.c | 2 +- net/sunrpc/xprtrdma/svc_rdma_backchannel.c | 2 +- net/sunrpc/xprtrdma/transport.c | 26 ++++++++++---------------- net/sunrpc/xprtrdma/xprt_rdma.h | 1 - net/sunrpc/xprtsock.c | 6 ++---- 8 files changed, 20 insertions(+), 31 deletions(-) diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h index 38d4c1b..7ba040c 100644 --- a/include/linux/sunrpc/sched.h +++ b/include/linux/sunrpc/sched.h @@ -240,7 +240,7 @@ struct rpc_task *rpc_wake_up_first(struct rpc_wait_queue *, void rpc_wake_up_status(struct rpc_wait_queue *, int); void rpc_delay(struct rpc_task *, unsigned long); int rpc_malloc(struct rpc_task *); -void rpc_free(void *); +void rpc_free(struct rpc_task *); int rpciod_up(void); void rpciod_down(void); int __rpc_wait_for_completion_task(struct rpc_task *task, wait_bit_action_f *); diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index c01f468..72c2aeb 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -128,7 +128,7 @@ struct rpc_xprt_ops { void (*set_port)(struct rpc_xprt *xprt, unsigned short port); void (*connect)(struct rpc_xprt *xprt, struct rpc_task *task); int (*buf_alloc)(struct rpc_task *task); - void (*buf_free)(void *buffer); + void (*buf_free)(struct rpc_task *task); int (*send_request)(struct rpc_task *task); void (*set_retrans_timeout)(struct rpc_task *task); void (*timer)(struct rpc_xprt *xprt, struct rpc_task *task); diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index b964d40..6690ebc 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -896,18 +896,16 @@ int rpc_malloc(struct rpc_task *task) EXPORT_SYMBOL_GPL(rpc_malloc); /** - * rpc_free - free buffer allocated via rpc_malloc - * @buffer: buffer to free + * rpc_free - free RPC buffer resources allocated via rpc_malloc + * @task: RPC task * */ -void rpc_free(void *buffer) +void rpc_free(struct rpc_task *task) { + void *buffer = task->tk_rqstp->rq_buffer; size_t size; struct rpc_buffer *buf; - if (!buffer) - return; - buf = container_of(buffer, struct rpc_buffer, data); size = buf->len; diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index ea244b2..685e6d2 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -1295,7 +1295,7 @@ void xprt_release(struct rpc_task *task) xprt_schedule_autodisconnect(xprt); spin_unlock_bh(&xprt->transport_lock); if (req->rq_buffer) - xprt->ops->buf_free(req->rq_buffer); + xprt->ops->buf_free(task); xprt_inject_disconnect(xprt); if (req->rq_cred != NULL) put_rpccred(req->rq_cred); diff --git a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c index 124688b..fa89350 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c +++ b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c @@ -186,7 +186,7 @@ xprt_rdma_bc_allocate(struct rpc_task *task) } static void -xprt_rdma_bc_free(void *buffer) +xprt_rdma_bc_free(struct rpc_task *task) { /* No-op: ctxt and page have already been freed. */ } diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index daa7d4d..ebf14ba 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -523,7 +523,6 @@ xprt_rdma_allocate(struct rpc_task *task) out: dprintk("RPC: %s: size %zd, request 0x%p\n", __func__, size, req); req->rl_connect_cookie = 0; /* our reserved value */ - req->rl_task = task; rqst->rq_buffer = req->rl_sendbuf->rg_base; return 0; @@ -571,31 +570,26 @@ out_fail: return -ENOMEM; } -/* - * This function returns all RDMA resources to the pool. +/** + * xprt_rdma_free - release resources allocated by xprt_rdma_allocate + * @task: RPC task + * + * Caller guarantees rqst->rq_buffer is non-NULL. */ static void -xprt_rdma_free(void *buffer) +xprt_rdma_free(struct rpc_task *task) { - struct rpcrdma_req *req; - struct rpcrdma_xprt *r_xprt; - struct rpcrdma_regbuf *rb; - - if (buffer == NULL) - return; + struct rpc_rqst *rqst = task->tk_rqstp; + struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt); + struct rpcrdma_req *req = rpcr_to_rdmar(rqst); - rb = container_of(buffer, struct rpcrdma_regbuf, rg_base[0]); - req = rb->rg_owner; if (req->rl_backchannel) return; - r_xprt = container_of(req->rl_buffer, struct rpcrdma_xprt, rx_buf); - dprintk("RPC: %s: called on 0x%p\n", __func__, req->rl_reply); r_xprt->rx_ia.ri_ops->ro_unmap_safe(r_xprt, req, - !RPC_IS_ASYNC(req->rl_task)); - + !RPC_IS_ASYNC(task)); rpcrdma_buffer_put(req); } diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 6d466ab..296d9ab 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -283,7 +283,6 @@ struct rpcrdma_req { struct list_head rl_free; unsigned int rl_niovs; unsigned int rl_connect_cookie; - struct rpc_task *rl_task; struct rpcrdma_buffer *rl_buffer; struct rpcrdma_rep *rl_reply;/* holder for reply buffer */ struct ib_sge rl_send_iov[RPCRDMA_MAX_IOVS]; diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 54a7b4c..41fae68 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -2560,13 +2560,11 @@ static int bc_malloc(struct rpc_task *task) /* * Free the space allocated in the bc_alloc routine */ -static void bc_free(void *buffer) +static void bc_free(struct rpc_task *task) { + void *buffer = task->tk_rqstp->rq_buffer; struct rpc_buffer *buf; - if (!buffer) - return; - buf = container_of(buffer, struct rpc_buffer, data); free_page((unsigned long)buf); } -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
WARNING: multiple messages have this Message-ID (diff)
From: Chuck Lever <chuck.lever@oracle.com> To: linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org Subject: [PATCH v2 04/22] SUNRPC: Generalize the RPC buffer release API Date: Tue, 23 Aug 2016 13:52:36 -0400 [thread overview] Message-ID: <20160823175235.13038.20673.stgit@manet.1015granger.net> (raw) In-Reply-To: <20160823174402.13038.84561.stgit@manet.1015granger.net> xprtrdma needs to allocate the Call and Reply buffers separately. TBH, the reliance on using a single buffer for the pair of XDR buffers is transport implementation-specific. Instead of passing just the rq_buffer into the buf_free method, pass the task structure and let buf_free take care of freeing both XDR buffers at once. There's a micro-optimization here. In the common case, both xprt_release and the transport's buf_free method were checking if rq_buffer was NULL. Now the check is done only once per RPC. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> --- include/linux/sunrpc/sched.h | 2 +- include/linux/sunrpc/xprt.h | 2 +- net/sunrpc/sched.c | 10 ++++------ net/sunrpc/xprt.c | 2 +- net/sunrpc/xprtrdma/svc_rdma_backchannel.c | 2 +- net/sunrpc/xprtrdma/transport.c | 26 ++++++++++---------------- net/sunrpc/xprtrdma/xprt_rdma.h | 1 - net/sunrpc/xprtsock.c | 6 ++---- 8 files changed, 20 insertions(+), 31 deletions(-) diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h index 38d4c1b..7ba040c 100644 --- a/include/linux/sunrpc/sched.h +++ b/include/linux/sunrpc/sched.h @@ -240,7 +240,7 @@ struct rpc_task *rpc_wake_up_first(struct rpc_wait_queue *, void rpc_wake_up_status(struct rpc_wait_queue *, int); void rpc_delay(struct rpc_task *, unsigned long); int rpc_malloc(struct rpc_task *); -void rpc_free(void *); +void rpc_free(struct rpc_task *); int rpciod_up(void); void rpciod_down(void); int __rpc_wait_for_completion_task(struct rpc_task *task, wait_bit_action_f *); diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index c01f468..72c2aeb 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -128,7 +128,7 @@ struct rpc_xprt_ops { void (*set_port)(struct rpc_xprt *xprt, unsigned short port); void (*connect)(struct rpc_xprt *xprt, struct rpc_task *task); int (*buf_alloc)(struct rpc_task *task); - void (*buf_free)(void *buffer); + void (*buf_free)(struct rpc_task *task); int (*send_request)(struct rpc_task *task); void (*set_retrans_timeout)(struct rpc_task *task); void (*timer)(struct rpc_xprt *xprt, struct rpc_task *task); diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index b964d40..6690ebc 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -896,18 +896,16 @@ int rpc_malloc(struct rpc_task *task) EXPORT_SYMBOL_GPL(rpc_malloc); /** - * rpc_free - free buffer allocated via rpc_malloc - * @buffer: buffer to free + * rpc_free - free RPC buffer resources allocated via rpc_malloc + * @task: RPC task * */ -void rpc_free(void *buffer) +void rpc_free(struct rpc_task *task) { + void *buffer = task->tk_rqstp->rq_buffer; size_t size; struct rpc_buffer *buf; - if (!buffer) - return; - buf = container_of(buffer, struct rpc_buffer, data); size = buf->len; diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index ea244b2..685e6d2 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -1295,7 +1295,7 @@ void xprt_release(struct rpc_task *task) xprt_schedule_autodisconnect(xprt); spin_unlock_bh(&xprt->transport_lock); if (req->rq_buffer) - xprt->ops->buf_free(req->rq_buffer); + xprt->ops->buf_free(task); xprt_inject_disconnect(xprt); if (req->rq_cred != NULL) put_rpccred(req->rq_cred); diff --git a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c index 124688b..fa89350 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c +++ b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c @@ -186,7 +186,7 @@ xprt_rdma_bc_allocate(struct rpc_task *task) } static void -xprt_rdma_bc_free(void *buffer) +xprt_rdma_bc_free(struct rpc_task *task) { /* No-op: ctxt and page have already been freed. */ } diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index daa7d4d..ebf14ba 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -523,7 +523,6 @@ xprt_rdma_allocate(struct rpc_task *task) out: dprintk("RPC: %s: size %zd, request 0x%p\n", __func__, size, req); req->rl_connect_cookie = 0; /* our reserved value */ - req->rl_task = task; rqst->rq_buffer = req->rl_sendbuf->rg_base; return 0; @@ -571,31 +570,26 @@ out_fail: return -ENOMEM; } -/* - * This function returns all RDMA resources to the pool. +/** + * xprt_rdma_free - release resources allocated by xprt_rdma_allocate + * @task: RPC task + * + * Caller guarantees rqst->rq_buffer is non-NULL. */ static void -xprt_rdma_free(void *buffer) +xprt_rdma_free(struct rpc_task *task) { - struct rpcrdma_req *req; - struct rpcrdma_xprt *r_xprt; - struct rpcrdma_regbuf *rb; - - if (buffer == NULL) - return; + struct rpc_rqst *rqst = task->tk_rqstp; + struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt); + struct rpcrdma_req *req = rpcr_to_rdmar(rqst); - rb = container_of(buffer, struct rpcrdma_regbuf, rg_base[0]); - req = rb->rg_owner; if (req->rl_backchannel) return; - r_xprt = container_of(req->rl_buffer, struct rpcrdma_xprt, rx_buf); - dprintk("RPC: %s: called on 0x%p\n", __func__, req->rl_reply); r_xprt->rx_ia.ri_ops->ro_unmap_safe(r_xprt, req, - !RPC_IS_ASYNC(req->rl_task)); - + !RPC_IS_ASYNC(task)); rpcrdma_buffer_put(req); } diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 6d466ab..296d9ab 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -283,7 +283,6 @@ struct rpcrdma_req { struct list_head rl_free; unsigned int rl_niovs; unsigned int rl_connect_cookie; - struct rpc_task *rl_task; struct rpcrdma_buffer *rl_buffer; struct rpcrdma_rep *rl_reply;/* holder for reply buffer */ struct ib_sge rl_send_iov[RPCRDMA_MAX_IOVS]; diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 54a7b4c..41fae68 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -2560,13 +2560,11 @@ static int bc_malloc(struct rpc_task *task) /* * Free the space allocated in the bc_alloc routine */ -static void bc_free(void *buffer) +static void bc_free(struct rpc_task *task) { + void *buffer = task->tk_rqstp->rq_buffer; struct rpc_buffer *buf; - if (!buffer) - return; - buf = container_of(buffer, struct rpc_buffer, data); free_page((unsigned long)buf); }
next prev parent reply other threads:[~2016-08-23 17:52 UTC|newest] Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-08-23 17:52 [PATCH v2 00/22] client-side NFS/RDMA patches proposed for v4.9 Chuck Lever 2016-08-23 17:52 ` Chuck Lever [not found] ` <20160823174402.13038.84561.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org> 2016-08-23 17:52 ` [PATCH v2 01/22] xprtrdma: Eliminate INLINE_THRESHOLD macros Chuck Lever 2016-08-23 17:52 ` Chuck Lever 2016-08-23 17:52 ` [PATCH v2 02/22] SUNRPC: Refactor rpc_xdr_buf_init() Chuck Lever 2016-08-23 17:52 ` Chuck Lever [not found] ` <20160823175219.13038.22735.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org> 2016-08-26 21:05 ` Anna Schumaker 2016-08-26 21:05 ` Anna Schumaker 2016-08-23 17:52 ` [PATCH v2 03/22] SUNRPC: Generalize the RPC buffer allocation API Chuck Lever 2016-08-23 17:52 ` Chuck Lever 2016-08-23 17:52 ` Chuck Lever [this message] 2016-08-23 17:52 ` [PATCH v2 04/22] SUNRPC: Generalize the RPC buffer release API Chuck Lever 2016-08-23 17:52 ` [PATCH v2 05/22] SUNRPC: Separate buffer pointers for RPC Call and Reply messages Chuck Lever 2016-08-23 17:52 ` Chuck Lever [not found] ` <20160823175244.13038.39619.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org> 2016-08-29 14:23 ` Anna Schumaker 2016-08-29 14:23 ` Anna Schumaker [not found] ` <1e9440d8-111a-4252-c706-2e3c26f7b09a-ZwjVKphTwtPQT0dZR+AlfA@public.gmane.org> 2016-08-29 15:33 ` Chuck Lever 2016-08-29 15:33 ` Chuck Lever [not found] ` <10EFE631-06F6-4E4E-9EBC-F7ABFDF2C742-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2016-08-29 15:44 ` Anna Schumaker 2016-08-29 15:44 ` Anna Schumaker 2016-08-23 17:52 ` [PATCH v2 06/22] SUNRPC: Add a transport-specific private field in rpc_rqst Chuck Lever 2016-08-23 17:52 ` Chuck Lever 2016-08-23 17:53 ` [PATCH v2 07/22] xprtrdma: Initialize separate RPC call and reply buffers Chuck Lever 2016-08-23 17:53 ` Chuck Lever 2016-08-23 17:53 ` [PATCH v2 08/22] xprtrdma: Use smaller buffers for RPC-over-RDMA headers Chuck Lever 2016-08-23 17:53 ` Chuck Lever 2016-08-23 17:53 ` [PATCH v2 09/22] xprtrdma: Replace DMA_BIDIRECTIONAL Chuck Lever 2016-08-23 17:53 ` Chuck Lever 2016-08-23 17:53 ` [PATCH v2 10/22] xprtrdma: Delay DMA mapping Send and Receive buffers Chuck Lever 2016-08-23 17:53 ` Chuck Lever 2016-08-23 17:53 ` [PATCH v2 11/22] xprtrdma: Eliminate "ia" argument in rpcrdma_{alloc, free}_regbuf Chuck Lever 2016-08-23 17:53 ` Chuck Lever 2016-08-23 17:53 ` [PATCH v2 12/22] xprtrdma: Simplify rpcrdma_ep_post_recv() Chuck Lever 2016-08-23 17:53 ` Chuck Lever 2016-08-23 17:53 ` [PATCH v2 13/22] xprtrdma: Move send_wr to struct rpcrdma_req Chuck Lever 2016-08-23 17:53 ` Chuck Lever 2016-08-23 17:53 ` [PATCH v2 14/22] xprtrdma: Move recv_wr to struct rpcrdma_rep Chuck Lever 2016-08-23 17:53 ` Chuck Lever 2016-08-23 17:54 ` [PATCH v2 15/22] rpcrdma: RDMA/CM private message data structure Chuck Lever 2016-08-23 17:54 ` Chuck Lever 2016-08-23 17:54 ` [PATCH v2 16/22] xprtrdma: Client-side support for rpcrdma_connect_private Chuck Lever 2016-08-23 17:54 ` Chuck Lever 2016-08-23 17:54 ` [PATCH v2 17/22] xprtrdma: Basic support for Remote Invalidation Chuck Lever 2016-08-23 17:54 ` Chuck Lever 2016-08-23 17:54 ` [PATCH v2 18/22] xprtrdma: Use gathered Send for large inline messages Chuck Lever 2016-08-23 17:54 ` Chuck Lever 2016-08-23 17:54 ` [PATCH v2 19/22] xprtrdma: Support larger inline thresholds Chuck Lever 2016-08-23 17:54 ` Chuck Lever [not found] ` <20160823175438.13038.1624.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org> 2016-08-29 19:52 ` Anna Schumaker 2016-08-29 19:52 ` Anna Schumaker [not found] ` <c922120b-35f3-65bf-e778-3cef645cee48-ZwjVKphTwtPQT0dZR+AlfA@public.gmane.org> 2016-08-29 20:02 ` Chuck Lever 2016-08-29 20:02 ` Chuck Lever 2016-08-23 17:54 ` [PATCH v2 20/22] xprtrmda: Report address of frmr, not mw Chuck Lever 2016-08-23 17:54 ` Chuck Lever [not found] ` <20160823175446.13038.58792.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org> 2016-08-29 19:54 ` Anna Schumaker 2016-08-29 19:54 ` Anna Schumaker [not found] ` <7f92664a-a16c-6c44-b8f8-391e4fec0a89-ZwjVKphTwtPQT0dZR+AlfA@public.gmane.org> 2016-08-29 20:13 ` Chuck Lever 2016-08-29 20:13 ` Chuck Lever 2016-08-23 17:54 ` [PATCH v2 21/22] xprtrdma: Rename rpcrdma_receive_wc() Chuck Lever 2016-08-23 17:54 ` Chuck Lever 2016-08-23 17:55 ` [PATCH v2 22/22] xprtrdma: Eliminate rpcrdma_receive_worker() Chuck Lever 2016-08-23 17:55 ` Chuck Lever
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