Why max netlink msg size is limited to 16k

[prashantkumar dhotre]

Can I use NLM_F_MULTI netlink multipart msg flag to send large buffer ?
I could not find example of that usage in sending case .

I have a kernel module and tryng to send large buffer to user app.
If I can use that flag, will kernel take care of splitting large
buffer into small chunks and will kernel also send NLMSG_DONE type msg
at end to user app?
How should I handle in user app.
Can you point me to few example please.


On Sat, Apr 22, 2017 at 7:42 PM, prashantkumar dhotre
<prashantkumardhotre at gmail.com> wrote:
> I am observing that max netlink msg that my kernel module can send to
> user app is close to 16K.
>
> For larger sizes, genlmsg_unicast() succeeds but my app does not receive data.
>
> I have tried increasing RECV buffer size in my user app but that does not help.
>
> Regards