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From: Jason Wang <jasowang@redhat.com>
To: mst@redhat.com, kvm@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Jason Wang <jasowang@redhat.com>
Subject: [PATCH V2 1/3] vhost: introduce vhost_has_work()
Date: Tue,  1 Dec 2015 14:39:43 +0800	[thread overview]
Message-ID: <1448951985-12385-2-git-send-email-jasowang@redhat.com> (raw)
In-Reply-To: <1448951985-12385-1-git-send-email-jasowang@redhat.com>

This path introduces a helper which can give a hint for whether or not
there's a work queued in the work list.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 drivers/vhost/vhost.c | 7 +++++++
 drivers/vhost/vhost.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index eec2f11..163b365 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -245,6 +245,13 @@ void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work)
 }
 EXPORT_SYMBOL_GPL(vhost_work_queue);
 
+/* A lockless hint for busy polling code to exit the loop */
+bool vhost_has_work(struct vhost_dev *dev)
+{
+	return !list_empty(&dev->work_list);
+}
+EXPORT_SYMBOL_GPL(vhost_has_work);
+
 void vhost_poll_queue(struct vhost_poll *poll)
 {
 	vhost_work_queue(poll->dev, &poll->work);
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index d3f7674..43284ad 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -37,6 +37,7 @@ struct vhost_poll {
 
 void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn);
 void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work);
+bool vhost_has_work(struct vhost_dev *dev);
 
 void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
 		     unsigned long mask, struct vhost_dev *dev);
-- 
2.5.0


WARNING: multiple messages have this Message-ID (diff)
From: Jason Wang <jasowang@redhat.com>
To: mst@redhat.com, kvm@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH V2 1/3] vhost: introduce vhost_has_work()
Date: Tue,  1 Dec 2015 14:39:43 +0800	[thread overview]
Message-ID: <1448951985-12385-2-git-send-email-jasowang@redhat.com> (raw)
In-Reply-To: <1448951985-12385-1-git-send-email-jasowang@redhat.com>

This path introduces a helper which can give a hint for whether or not
there's a work queued in the work list.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 drivers/vhost/vhost.c | 7 +++++++
 drivers/vhost/vhost.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index eec2f11..163b365 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -245,6 +245,13 @@ void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work)
 }
 EXPORT_SYMBOL_GPL(vhost_work_queue);
 
+/* A lockless hint for busy polling code to exit the loop */
+bool vhost_has_work(struct vhost_dev *dev)
+{
+	return !list_empty(&dev->work_list);
+}
+EXPORT_SYMBOL_GPL(vhost_has_work);
+
 void vhost_poll_queue(struct vhost_poll *poll)
 {
 	vhost_work_queue(poll->dev, &poll->work);
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index d3f7674..43284ad 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -37,6 +37,7 @@ struct vhost_poll {
 
 void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn);
 void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work);
+bool vhost_has_work(struct vhost_dev *dev);
 
 void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
 		     unsigned long mask, struct vhost_dev *dev);
-- 
2.5.0

  reply	other threads:[~2015-12-01  6:40 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-01  6:39 [PATCH V2 0/3] basic busy polling support for vhost_net Jason Wang
2015-12-01  6:39 ` Jason Wang [this message]
2015-12-01  6:39   ` [PATCH V2 1/3] vhost: introduce vhost_has_work() Jason Wang
2015-12-01  6:39 ` [PATCH V2 2/3] vhost: introduce vhost_vq_more_avail() Jason Wang
2015-12-01  6:39 ` Jason Wang
2016-01-20 14:09   ` Michael S. Tsirkin
2016-01-20 14:09   ` Michael S. Tsirkin
2016-01-22  5:43     ` Jason Wang
2016-01-22  5:43       ` Jason Wang
2015-12-01  6:39 ` [PATCH V2 3/3] vhost_net: basic polling support Jason Wang
2015-12-01  6:39 ` Jason Wang
2016-01-20 14:35   ` Michael S. Tsirkin
2016-01-20 14:35   ` Michael S. Tsirkin
2016-01-21  2:11     ` Yang Zhang
2016-01-21  2:11       ` Yang Zhang
2016-01-21  5:13       ` Michael S. Tsirkin
2016-01-21  5:13       ` Michael S. Tsirkin
2016-01-21  6:39         ` Yang Zhang
2016-01-21  6:39           ` Yang Zhang
2016-01-22  5:59     ` Jason Wang
2016-01-22  5:59       ` Jason Wang
2016-01-24  9:00 ` [PATCH V2 0/3] basic busy polling support for vhost_net Mike Rapoport
2016-01-25  3:00   ` Jason Wang
2016-01-25  7:58     ` Michael Rapoport
2016-01-25  8:41       ` Jason Wang
2016-01-25  8:41         ` Jason Wang

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