From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Sagi Grimberg To: linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-rdma@vger.kernel.org, target-devel@vger.kernel.org Subject: [PATCH rfc 02/10] nvme-pci: Add budget to __nvme_process_cq Date: Thu, 9 Mar 2017 15:16:34 +0200 Message-Id: <1489065402-14757-3-git-send-email-sagi@grimberg.me> In-Reply-To: <1489065402-14757-1-git-send-email-sagi@grimberg.me> References: <1489065402-14757-1-git-send-email-sagi@grimberg.me> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+axboe=kernel.dk@lists.infradead.org List-ID: Prepare to allow passing a batch size to nvme cq processing. This patch does not change an functionality. Signed-off-by: Sagi Grimberg --- drivers/nvme/host/pci.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index d3f74fa40f26..4ed67f194cfd 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -716,14 +716,15 @@ static inline bool nvme_read_cqe(struct nvme_queue *nvmeq, return false; } -static int __nvme_process_cq(struct nvme_queue *nvmeq, int *tag) +static int __nvme_process_cq(struct nvme_queue *nvmeq, int budget, int *tag) { struct nvme_completion cqe; int consumed = 0; while (nvme_read_cqe(nvmeq, &cqe)) { nvme_handle_cqe(nvmeq, &cqe); - consumed++; + if (++consumed == budget) + break; if (tag && *tag == cqe.command_id) { *tag = -1; @@ -741,7 +742,7 @@ static int __nvme_process_cq(struct nvme_queue *nvmeq, int *tag) static int nvme_process_cq(struct nvme_queue *nvmeq) { - return __nvme_process_cq(nvmeq, NULL); + return __nvme_process_cq(nvmeq, INT_MAX, NULL); } static irqreturn_t nvme_irq(int irq, void *data) @@ -772,7 +773,7 @@ static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) if (nvme_cqe_valid(nvmeq, nvmeq->cq_head, nvmeq->cq_phase)) { spin_lock_irq(&nvmeq->q_lock); - __nvme_process_cq(nvmeq, &tag); + __nvme_process_cq(nvmeq, INT_MAX, &tag); spin_unlock_irq(&nvmeq->q_lock); if (tag == -1) -- 2.7.4 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme