From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sagi Grimberg Subject: [PATCH v3] IB/cq: Don't process more than the given budget Date: Thu, 16 Mar 2017 18:57:00 +0200 Message-ID: <1489683420-28005-1-git-send-email-sagi@grimberg.me> Return-path: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Bart Van Assche List-Id: linux-rdma@vger.kernel.org The caller might not want this overhead. Reviewed-by: Bart Van Assche Reviewed-by: Leon Romanovsky Signed-off-by: Sagi Grimberg --- drivers/infiniband/core/cq.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/core/cq.c b/drivers/infiniband/core/cq.c index e95510117a6d..b9c4cefe90c1 100644 --- a/drivers/infiniband/core/cq.c +++ b/drivers/infiniband/core/cq.c @@ -29,7 +29,13 @@ static int __ib_process_cq(struct ib_cq *cq, int budget) { int i, n, completed = 0; - while ((n = ib_poll_cq(cq, IB_POLL_BATCH, cq->wc)) > 0) { + /* + * budget might be (-1) if the caller does not + * want to bound this call, thus we need unsigned + * minimum here. + */ + while ((n = ib_poll_cq(cq, min_t(u32, IB_POLL_BATCH, + budget - completed), cq->wc)) > 0) { for (i = 0; i < n; i++) { struct ib_wc *wc = &cq->wc[i]; -- 2.7.4 -- 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