lkml.org 
[lkml]   [2011]   [May]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH V6 2/4 net-next] skbuff: Add userspace zero-copy buffers in skb
From
Date
On Thu, 2011-05-26 at 22:55 +0200, Eric Dumazet wrote:
> Le jeudi 26 mai 2011 à 13:24 -0700, Shirley Ma a écrit :
>
> > I could reduce callback pointer by moving it to *arg, but not desc,
> this
> > indicates that which buffer DMA hasn't done yet in *arg.
>
>
> I guess you dont need to use skb itself to hold all your states ?
>
> I understand its convenient for you, but I believe its worth the pain
> to
> use only one pointer to a (small) object where you put all your stuff.
>
> Some machines alloc/free millions of skbs per second.
>
> If/when most skb uses are for userspace zero-copy buffers we can
> embbed
> your small object in skb itself ;)

You are right, w/o this desc, there will be lots of alloc/dealloc in the
caller side. To have better performance, maybe I should have changed
most skbs to use zero-copy buffers. :)

Ok, for now let me try to move it to caller, just leave one pointer
*uarg here.

Thanks
Shirley

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2011-05-26 23:11    [W:0.035 / U:41.220 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site