Re: Problem in pfmemalloc skb handling in net/core/dev.c

[Xie He]

On Fri, Apr 9, 2021 at 3:04 AM Eric Dumazet <eric.dumazet@xxxxxxxxx> wrote:
>
> Note that pfmemalloc skbs are normally dropped in sk_filter_trim_cap()
>
> Simply make sure your protocol use it.

It seems "sk_filter_trim_cap" needs an "struct sock" argument. Some of
my protocols act like a middle layer to another protocol and don't
have any "struct sock".

Also, I think this is a problem in net/core/dev.c, there are a lot of
old protocols that are not aware of pfmemalloc skbs. I don't think
it's a good idea to fix them one by one.