From: Sagi Grimberg <[email protected]> Poll in batch of 16. Since we don't want it on the stack, keep under iser completion context (iser_comp).
Signed-off-by: Sagi Grimberg <[email protected]> Signed-off-by: Or Gerlitz <[email protected]> --- drivers/infiniband/ulp/iser/iscsi_iser.h | 4 ++++ drivers/infiniband/ulp/iser/iser_verbs.c | 12 +++++++----- 2 files changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h index 4fcb256..6c3743b 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.h +++ b/drivers/infiniband/ulp/iser/iscsi_iser.h @@ -145,6 +145,8 @@ ISER_MAX_TX_MISC_PDUS + \ ISER_MAX_RX_MISC_PDUS) +#define ISER_WC_BATCH_COUNT 16 + #define ISER_VER 0x10 #define ISER_WSV 0x08 #define ISER_RSV 0x04 @@ -273,6 +275,7 @@ struct iscsi_iser_task; * * @device: pointer to device handle * @cq: completion queue + * @wcs: work completion array * @tasklet: Tasklet handle * @active_qps: Number of active QPs attached * to completion context @@ -280,6 +283,7 @@ struct iscsi_iser_task; struct iser_comp { struct iser_device *device; struct ib_cq *cq; + struct ib_wc wcs[ISER_WC_BATCH_COUNT]; struct tasklet_struct tasklet; int active_qps; }; diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c index 805a9bd..82bedbc 100644 --- a/drivers/infiniband/ulp/iser/iser_verbs.c +++ b/drivers/infiniband/ulp/iser/iser_verbs.c @@ -1232,13 +1232,15 @@ static void iser_cq_tasklet_fn(unsigned long data) { struct iser_comp *comp = (struct iser_comp *)data; struct ib_cq *cq = comp->cq; - struct ib_wc wc; - int completed = 0; + struct ib_wc *const wcs = comp->wcs; + int i, n, completed = 0; - while (ib_poll_cq(cq, 1, &wc) == 1) { - iser_handle_wc(&wc); + while ((n = ib_poll_cq(cq, ARRAY_SIZE(comp->wcs), wcs)) > 0) { + for (i = 0; i < n; i++) + iser_handle_wc(&wcs[i]); - if (++completed >= iser_cq_poll_limit) + completed += n; + if (completed >= iser_cq_poll_limit) break; } -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
