From: Simon Horman <horms@kernel.org>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: netdev@vger.kernel.org, Jamal Hadi Salim <jhs@mojatatu.com>,
Jiri Pirko <jiri@resnulli.us>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH net v4 4/8] net/sched: netem: refactor dequeue into helper functions
Date: Fri, 10 Apr 2026 12:39:57 +0100 [thread overview]
Message-ID: <20260410113957.GV469338@kernel.org> (raw)
In-Reply-To: <20260406172627.210894-5-stephen@networkplumber.org>
On Mon, Apr 06, 2026 at 10:25:12AM -0700, Stephen Hemminger wrote:
> Extract the tfifo removal, slot accounting, and child/direct dequeue
> paths from the monolithic netem_dequeue() into separate helpers:
>
> netem_pull_tfifo() - remove head packet from tfifo
> netem_slot_account() - update slot pacing counters
> netem_dequeue_child() - enqueue to child, then dequeue from child
> netem_dequeue_direct()- dequeue from tfifo when no child
>
> This replaces the goto-based control flow with straightforward function
> calls, making the code easier to follow and modify.
>
> No functional change intended.
Manually verified (as best I could :)
>
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Thanks for splitting this out.
It was very helpful.
Reviewed-by: Simon Horman <horms@kernel.org>
next prev parent reply other threads:[~2026-04-10 11:40 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-06 17:25 [PATCH net v4 0/8] net/sched: netem bug fixes Stephen Hemminger
2026-04-06 17:25 ` [PATCH net v4 1/8] net/sched: netem: fix probability gaps in 4-state loss model Stephen Hemminger
2026-04-06 17:25 ` [PATCH net v4 2/8] net/sched: netem: fix queue limit check to include reordered packets Stephen Hemminger
2026-04-06 17:25 ` [PATCH net v4 3/8] net/sched: netem: only reseed PRNG when seed is explicitly provided Stephen Hemminger
2026-04-06 17:25 ` [PATCH net v4 4/8] net/sched: netem: refactor dequeue into helper functions Stephen Hemminger
2026-04-10 11:39 ` Simon Horman [this message]
2026-04-06 17:25 ` [PATCH net v4 5/8] net/sched: netem: batch-transfer ready packets to avoid child re-entrancy Stephen Hemminger
2026-04-10 11:36 ` Simon Horman
2026-04-10 11:39 ` Simon Horman
2026-04-06 17:25 ` [PATCH net v4 6/8] net/sched: netem: null-terminate tfifo linear queue tail Stephen Hemminger
2026-04-06 17:25 ` [PATCH net v4 7/8] net/sched: netem: check for invalid slot range Stephen Hemminger
2026-04-06 17:25 ` [PATCH net v4 8/8] net/sched: netem: fix slot delay calculation overflow Stephen Hemminger
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