On 1/11/26 5:39 PM, Jamal Hadi Salim wrote:

We introduce a 2-bit global skb->ttl counter.Patch #1 describes how we puti
together those bits. Patches #2 and patch #5 use these bits.
I added Fixes tags to patch #1 in case it is useful for backporting.
Patch #3 and #4 revert William's earlier netem commits. Patch #6 introduces
tdc test cases.

Generally speaking I think that a more self-encapsulated solution should
be preferable.

I [mis?]understand that your main concern with Cong's series is the
possible parent qlen corruption in case of duplication and the last
iteration of such series includes a self-test for that, is there
anything missing there?

The new sk_buff field looks a bit controversial. Adding such field
opens/implies using it for other/all loop detection; a 2 bits counter
will not be enough for that, and the struct sk_buff will increase for
typical build otherwise.

FTR I don't think that sk_buff the size increase for minimal config is
very relevant, as most/all of the binary layout optimization and not
thought for such build.

/P