netdev - [PATCH net-next 6/8] ionic: check for queue deadline in doorbell_napi

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240610230706.34883-7-shannon.nelson@amd.com>
Date: Mon, 10 Jun 2024 16:07:04 -0700
From: Shannon Nelson <shannon.nelson@....com>
To: <netdev@...r.kernel.org>, <davem@...emloft.net>, <kuba@...nel.org>,
	<edumazet@...gle.com>, <pabeni@...hat.com>
CC: <brett.creeley@....com>, <drivers@...sando.io>, Shannon Nelson
	<shannon.nelson@....com>
Subject: [PATCH net-next 6/8] ionic: check for queue deadline in doorbell_napi_work

Check the deadline against the last time run and only
schedule a new napi if we haven't been run recently.

Signed-off-by: Shannon Nelson <shannon.nelson@....com>
---
 drivers/net/ethernet/pensando/ionic/ionic_dev.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index a5a4dc21b9f3..f3f603c90c94 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -60,7 +60,14 @@ void ionic_doorbell_napi_work(struct work_struct *work)
 {
 	struct ionic_qcq *qcq = container_of(work, struct ionic_qcq,
 					     doorbell_napi_work);
-	ionic_napi_schedule_do_softirq(&qcq->napi);
+	unsigned long now, then, dif;
+
+	now = READ_ONCE(jiffies);
+	then = qcq->q.dbell_jiffies;
+	dif = now - then;
+
+	if (dif > qcq->q.dbell_deadline)
+		ionic_napi_schedule_do_softirq(&qcq->napi);
 }
 
 static int ionic_get_preferred_cpu(struct ionic *ionic,
-- 
2.17.1