On (09/03/18 10:02), Steffen Klassert wrote:

I'm working on patches that builds such skb lists. The list is chained
at the frag_list pointer of the first skb, all subsequent skbs are linked
to the next pointer of the skb. It looks like this:

there are some risks to using the frag_list pointer, Alex Duyck
had pointed this out to me in 
  https://www.mail-archive.com/netdev@vger.kernel.org/msg131081.html
(see last paragraph, or search for the string "gotcha" there)

I dont know the details of your playground patch, but might want to
watch out for those to make sure it is immune to these issues..

--Sowmini