when is alloc_skb called

[Sushant Sharma]

Hi All

I want to know which are the evnets
that can lead to the calling of alloc_skb
function which is used to allocate sk_buff.
Arrival and departure of packet are 2 events
which I know. Are there any other events/cases
which can lead to alloc_skb(...) function call in kernel.

Thanks for help
Sushant

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