From: Jason Wang <jasowang@redhat.com>
To: mst@redhat.com, jasowang@redhat.com, kvm@vger.kernel.org,
virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: peterx@redhat.com, aarcange@redhat.com,
James.Bottomley@hansenpartnership.com, hch@infradead.org,
davem@davemloft.net, jglisse@redhat.com, linux-mm@kvack.org,
linux-arm-kernel@lists.infradead.org,
linux-parisc@vger.kernel.org, christophe.de.dinechin@gmail.com,
jrdr.linux@gmail.com
Subject: [RFC PATCH V3 3/6] vhost: rename vq_iotlb_prefetch() to vq_meta_prefetch()
Date: Tue, 23 Apr 2019 01:54:17 -0400 [thread overview]
Message-ID: <20190423055420.26408-4-jasowang@redhat.com> (raw)
In-Reply-To: <20190423055420.26408-1-jasowang@redhat.com>
Rename the function to be more accurate since it actually tries to
prefetch vq metadata address in IOTLB. And this will be used by
following patch to prefetch metadata virtual addresses.
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/vhost/net.c | 4 ++--
drivers/vhost/vhost.c | 4 ++--
drivers/vhost/vhost.h | 2 +-
3 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index df51a35cf537..bf55f995ebae 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -971,7 +971,7 @@ static void handle_tx(struct vhost_net *net)
if (!sock)
goto out;
- if (!vq_iotlb_prefetch(vq))
+ if (!vq_meta_prefetch(vq))
goto out;
vhost_disable_notify(&net->dev, vq);
@@ -1140,7 +1140,7 @@ static void handle_rx(struct vhost_net *net)
if (!sock)
goto out;
- if (!vq_iotlb_prefetch(vq))
+ if (!vq_meta_prefetch(vq))
goto out;
vhost_disable_notify(&net->dev, vq);
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 7335f2275ed3..bff4d586871d 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -1313,7 +1313,7 @@ static bool iotlb_access_ok(struct vhost_virtqueue *vq,
return true;
}
-int vq_iotlb_prefetch(struct vhost_virtqueue *vq)
+int vq_meta_prefetch(struct vhost_virtqueue *vq)
{
size_t s = vhost_has_feature(vq, VIRTIO_RING_F_EVENT_IDX) ? 2 : 0;
unsigned int num = vq->num;
@@ -1332,7 +1332,7 @@ int vq_iotlb_prefetch(struct vhost_virtqueue *vq)
num * sizeof(*vq->used->ring) + s,
VHOST_ADDR_USED);
}
-EXPORT_SYMBOL_GPL(vq_iotlb_prefetch);
+EXPORT_SYMBOL_GPL(vq_meta_prefetch);
/* Can we log writes? */
/* Caller should have device mutex but not vq mutex */
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 9490e7ddb340..7a7fc001265f 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -209,7 +209,7 @@ bool vhost_enable_notify(struct vhost_dev *, struct vhost_virtqueue *);
int vhost_log_write(struct vhost_virtqueue *vq, struct vhost_log *log,
unsigned int log_num, u64 len,
struct iovec *iov, int count);
-int vq_iotlb_prefetch(struct vhost_virtqueue *vq);
+int vq_meta_prefetch(struct vhost_virtqueue *vq);
struct vhost_msg_node *vhost_new_msg(struct vhost_virtqueue *vq, int type);
void vhost_enqueue_msg(struct vhost_dev *dev,
--
2.18.1
next prev parent reply other threads:[~2019-04-23 5:54 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-23 5:54 [RFC PATCH V3 0/6] vhost: accelerate metadata access Jason Wang
2019-04-23 5:54 ` [RFC PATCH V3 1/6] vhost: generalize adding used elem Jason Wang
2019-04-23 5:54 ` [RFC PATCH V3 2/6] vhost: fine grain userspace memory accessors Jason Wang
2019-04-23 5:54 ` Jason Wang [this message]
2019-04-23 5:54 ` [RFC PATCH V3 4/6] vhost: introduce helpers to get the size of metadata area Jason Wang
2019-04-23 5:54 ` [RFC PATCH V3 5/6] vhost: factor out setting vring addr and num Jason Wang
2019-04-23 5:54 ` [RFC PATCH V3 6/6] vhost: access vq metadata through kernel virtual address Jason Wang
2019-05-05 9:20 ` [RFC PATCH V3 0/6] vhost: accelerate metadata access Jason Wang
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