From: Junjie Cao <junjie.cao@intel.com>
To: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org, davem@davemloft.net, edumazet@google.com,
pabeni@redhat.com, horms@kernel.org, jhs@mojatatu.com,
jiri@resnulli.us, vinicius.gomes@intel.com, shuah@kernel.org,
bestswngs@gmail.com, uladzislau.zhauniarovich@gmail.com,
hdanton@sina.com,
syzbot+19d01f6082ec61dd45b2@syzkaller.appspotmail.com,
syzbot+8785aaf121cfb2141e0d@syzkaller.appspotmail.com,
syzbot+2642f347f7309b4880dc@syzkaller.appspotmail.com,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH net v2 2/3] net/sched: taprio: enforce a minimum interval for software schedules
Date: Mon, 31 Aug 2026 15:30:46 +0800 [thread overview]
Message-ID: <20260831073046.409848-1-junjie.cao@intel.com> (raw)
In-Reply-To: <20260824185337.2704003-1-kuba@kernel.org>
On Mon, 24 Aug 2026 11:53:37 -0700, Jakub Kicinski <kuba@kernel.org> wrote:
> Since the change carries a Fixes: tag it will be picked up for stable, so
> working 802.1Qbv configurations would stop loading after a stable update.
Dropped in v3. With 1/3 fixed, an interval below the expiry cost only
burns CPU on bounded back-to-back expiries, and syzbot already confirmed
1/3 alone on a fourth bucket (link in my 1/3 reply). I'll re-test the
other three the same way before v3.
> Was flooring the rearm interval at runtime in advance_sched() considered as
[...]
Yes, [1] in the cover letter. On top of 1/3 it would only cap the expiry
rate for schedules already below the service cost, with one more
constant to pick. Can do as a follow-up if you want that.
next prev parent reply other threads:[~2026-08-31 7:31 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-20 6:27 [PATCH net v2 0/3] net/sched: taprio: fix software schedule livelocks Junjie Cao
2026-08-20 6:27 ` [PATCH net v2 1/3] net/sched: taprio: catch up in bounded time when the schedule falls behind Junjie Cao
2026-08-24 18:53 ` Jakub Kicinski
2026-08-31 7:30 ` Junjie Cao
2026-08-20 6:27 ` [PATCH net v2 2/3] net/sched: taprio: enforce a minimum interval for software schedules Junjie Cao
2026-08-24 18:53 ` Jakub Kicinski
2026-08-31 7:30 ` Junjie Cao [this message]
2026-08-20 6:27 ` [PATCH net v2 3/3] selftests/tc-testing: taprio: add case for the software minimum interval Junjie Cao
2026-08-24 18:53 ` Jakub Kicinski
2026-08-31 7:31 ` Junjie Cao
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