netdev - Re: BUG? flaky "migrate_reuseport/IPv4 TCP_NEW_SYN_RECV reqsk_timer

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Date: Thu, 21 Mar 2024 18:54:42 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Martin KaFai Lau <martin.lau@...ux.dev>
Cc: Kuniyuki Iwashima <kuniyu@...zon.com>, bpf <bpf@...r.kernel.org>,
 Network Development <netdev@...r.kernel.org>, Kuniyuki Iwashima
 <kuni1840@...il.com>
Subject: Re: BUG? flaky "migrate_reuseport/IPv4 TCP_NEW_SYN_RECV
 reqsk_timer_handler" test

On Thu, 21 Mar 2024 18:39:53 -0700 Martin KaFai Lau wrote:
> The bpf CI has recently hit failure in the "migrate_reuseport/IPv4 
> TCP_NEW_SYN_RECV" test. It does not always fail but becomes more flaky recently:
> https://github.com/kernel-patches/bpf/actions/runs/8354884067/job/22869153115

FWIW we had a handful of IPv6 and TCP tests start failing after we
merged first half of the merge window from Linus as well.
Maybe something in the scheduler changed and exposed timing problems
in the tests :(