RE: [PATCH] net: use hardware buffer pool to allocate skb

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> -----Original Message-----
> From: Oliver Hartkopp [mailto:socketcan@xxxxxxxxxxxx]
> Sent: Wednesday, October 15, 2014 12:59 PM
> To: Pan Jiafei-B37022; davem@xxxxxxxxxxxxx; jkosina@xxxxxxx
> Cc: netdev@xxxxxxxxxxxxxxx; Li Yang-Leo-R58472; linux-doc@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH] net: use hardware buffer pool to allocate skb
> 
> On 15.10.2014 05:26, Pan Jiafei wrote:
> > In some platform, there are some hardware block provided
> > to manage buffers to improve performance.
> 
> (..)
[Pan Jiafei] I want to build a general patch to build skb
by using hardware buffer manager block.
> 
> > diff --git a/net/Kconfig b/net/Kconfig
> > index d6b138e..346e021 100644
> > --- a/net/Kconfig
> > +++ b/net/Kconfig
> > @@ -291,6 +291,16 @@ config NET_FLOW_LIMIT
> >   	  with many clients some protection against DoS by a single (spoofed)
> >   	  flow that greatly exceeds average workload.
> >
> > +config USE_HW_SKB
> > +	bool "NIC use hardware managed buffer to build skb"
> > +	depends on INET
> 
> The feature seems to be valid for network devices in general.
> Why did you make it depending on INET ??
> 
> Regards,
> Oliver
> 
[Pan Jiafei] Yes, INET dependency should be removed, thanks.
> > +	---help---
> > +	  If select this, the third party drivers will use hardware managed
> > +	  buffers to allocate SKB without any modification for the driver.
> > +
> > +	  Documentation on how to use this featue can be found at
> > +	  <file:Documentation/networking/hw_skb.txt>.
> > +
> >   menu "Network testing"
> >
> >   config NET_PKTGEN

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