Re: [RFC PATCH 0/5] net: remove sk skb caches

On Fri, Sep 17, 2021 at 8:39 AM Paolo Abeni [off-list ref] wrote:

Eric noted we would be better off reverting the sk
skb caches.

MPTCP relies on such a feature, so we need a
little refactor of the MPTCP tx path before the mentioned
revert.

The first patch avoids that the next one will cause a name
clash. The second exposes additional TCP helpers. The 3rd patch
changes the MPTCP code to do locally the whole skb allocation
and updating, so it does not rely anymore on core TCP helpers
for that nor the sk skb cache.

As a side effect, we can drop the tcp_build_frag helper.

Finally, we can pull Eric's revert.

Note that patch 3/5 will conflict with the pending -net fix
for a recently reported syzkaller splat.

Thanks for working on this Paolo !