On Thu, 28 Aug 2025 23:49:18 +0200 Florian Westphal wrote:
> But all logs I saw show same scenario:
> 1. Failing tests have pmtu discovery off (i.e., ip fragmentation)
> 2. The test file is much larger than first-pass default (2M Byte)
> 3. peers have much larger MTUs compared to the 'network'.
>
> These errors are very reproducible when re-running the test with
> the same commandline arguments.
>
> The timeout became much more prominent with
> 1d2fbaad7cd8 ("tcp: stronger sk_rcvbuf checks"): reassembled packets
> typically have a skb->truesize more than double the skb length.
>
> As that commit is intentional and pmtud-off with
> large-tcp-packets-as-fragments is not normal adjust the test to use a
> smaller file for the pmtu-off subtests.
>
> While at it, add more information to pass/fail messages and
> also run the dscp alteration subtest with pmtu discovery enabled.
Thank you for fixing!
