linux-kernel - Re: [PULL] vhost: infrastructure changes for 3.16

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Message-ID: <20140612093915.GD22230@redhat.com>
Date:	Thu, 12 Jun 2014 12:39:15 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Romain Francoise <romain@...bokech.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>, nab@...erainc.com,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	sfr@...b.auug.org.au, linux-scsi@...r.kernel.org,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PULL] vhost: infrastructure changes for 3.16

On Thu, Jun 12, 2014 at 10:42:34AM +0200, Romain Francoise wrote:
> "Michael S. Tsirkin" <mst@...hat.com> writes:
> 
> > Memory allocation for vhost-net now supports fallback on vmalloc (same
> > as for vhost-scsi) this makes it possible to create the device on
> > systems where memory is very fragmented, with slightly lower
> > performance.
> 
> Thanks Michael, I'm glad to see that this change made its way into
> mainline after all! Would you be willing to take the following on top?
> 
> 
> From: Romain Francoise <romain@...bokech.com>
> Date: Thu, 12 Jun 2014 10:26:40 +0200
> Subject: [PATCH] vhost-net: don't open-code kvfree
> 
> Commit 23cc5a991c ("vhost-net: extend device allocation to vmalloc")
> added another open-coded version of kvfree (which is available since
> v3.15-rc5), nuke it.
> 
> Signed-off-by: Romain Francoise <romain@...bokech.com>
> ---

Absolutely, I'll queue this up, thanks!

>  drivers/vhost/net.c | 12 ++----------
>  1 file changed, 2 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
> index 971a760..8dae2f7 100644
> --- a/drivers/vhost/net.c
> +++ b/drivers/vhost/net.c
> @@ -700,14 +700,6 @@ static void handle_rx_net(struct vhost_work *work)
>  	handle_rx(net);
>  }
>  
> -static void vhost_net_free(void *addr)
> -{
> -	if (is_vmalloc_addr(addr))
> -		vfree(addr);
> -	else
> -		kfree(addr);
> -}
> -
>  static int vhost_net_open(struct inode *inode, struct file *f)
>  {
>  	struct vhost_net *n;
> @@ -723,7 +715,7 @@ static int vhost_net_open(struct inode *inode, struct file *f)
>  	}
>  	vqs = kmalloc(VHOST_NET_VQ_MAX * sizeof(*vqs), GFP_KERNEL);
>  	if (!vqs) {
> -		vhost_net_free(n);
> +		kvfree(n);
>  		return -ENOMEM;
>  	}
>  
> @@ -840,7 +832,7 @@ static int vhost_net_release(struct inode *inode, struct file *f)
>  	 * since jobs can re-queue themselves. */
>  	vhost_net_flush(n);
>  	kfree(n->dev.vqs);
> -	vhost_net_free(n);
> +	kvfree(n);
>  	return 0;
>  }
>  
> -- 
> 2.0.0
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