linux-kernel - Re: [PATCH 4/6] vhost_vsock: simplify vhost_vsock

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Message-ID: <20211116143514.2jvemtjrds4453me@steredhat>
Date:   Tue, 16 Nov 2021 15:35:14 +0100
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     Andrey Ryabinin <arbn@...dex-team.com>
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/6] vhost_vsock: simplify vhost_vsock_flush()

On Mon, Nov 15, 2021 at 06:30:01PM +0300, Andrey Ryabinin wrote:
>vhost_vsock_flush() calls vhost_work_dev_flush(vsock->vqs[i].poll.dev)
>before vhost_work_dev_flush(&vsock->dev). This seems pointless
>as vsock->vqs[i].poll.dev is the same as &vsock->dev and several flushes
>in a row doesn't do anything useful, one is just enough.
>
>Signed-off-by: Andrey Ryabinin <arbn@...dex-team.com>
>---
> drivers/vhost/vsock.c | 5 -----
> 1 file changed, 5 deletions(-)
>
>diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
>index b0361ebbd695..b4dcefbb7e60 100644
>--- a/drivers/vhost/vsock.c
>+++ b/drivers/vhost/vsock.c
>@@ -707,11 +707,6 @@ static int vhost_vsock_dev_open(struct inode *inode, struct file *file)
>
> static void vhost_vsock_flush(struct vhost_vsock *vsock)
> {
>-	int i;
>-
>-	for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++)
>-		if (vsock->vqs[i].handle_kick)
>-			vhost_work_dev_flush(vsock->vqs[i].poll.dev);
> 	vhost_work_dev_flush(&vsock->dev);
> }
>
>-- 
>2.32.0
>

Reviewed-by: Stefano Garzarella <sgarzare@...hat.com>