Hi All,
I have a networking hardware which does Rx coalescing , in which frames partaining to a nic device are combined and send as a big chunk ( Greater than mtu) to the driver.
In the driver i have to split them according to mtu size and need to sent up to the stack.
1) I want to know is there a way to allocate a page so that i can split that after the device DMA's the frame ?
2) Can a single Page can be shared across multiple skbs (not accross frags in a same skb)? If so what special care i need to take which unmapping the page?

Waiting for the reponses

Thanks
pradeep G

Yes, you can write your owner skb manager. You can do anything you want in your skb manager, such as a single page for multiple skbs.

THanks for the reply
How do we implement this skb manager ?

All i want is how do we write a skb manager so that stack wont free the page which is used by multiple skbs

For skb memory manager, it is like normal memory manager, allocate and free. The netdev_alloc_skb is used when allocating skb and dev_kfree_skb is used when freeing skb. You can modify these functions to meet your requirement.