From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Jakub Kicinski <kuba@kernel.org>
Cc: wen.yang@linux.dev,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, linux-kernel@vger.kernel.org,
Paolo Abeni <pabeni@redhat.com>
Subject: Re: [PATCH 6.6 3/3] net: Allow to use SMP threads for backlog NAPI.
Date: Mon, 19 Jan 2026 17:30:26 +0100 [thread overview]
Message-ID: <20260119163026.aA1PeSmP@linutronix.de> (raw)
In-Reply-To: <20260119082534.1f705011@kernel.org>
On 2026-01-19 08:25:34 [-0800], Jakub Kicinski wrote:
> On Mon, 19 Jan 2026 00:15:46 +0800 wen.yang@linux.dev wrote:
> > From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> >
> > commit dad6b97702639fba27a2bd3e986982ad6f0db3a7 upstream.
> >
> > Backlog NAPI is a per-CPU NAPI struct only (with no device behind it)
> > used by drivers which don't do NAPI them self, RPS and parts of the
> > stack which need to avoid recursive deadlocks while processing a packet.
>
> This is a rather large change to backport into LTS.
I agree. While I saw these patches flying by, I don't remember a mail
where it was justified why it was needed. Did I miss it?
Sebastian
next prev parent reply other threads:[~2026-01-19 16:30 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-18 16:15 [PATCH 6.6 0/3] net: Backlog NAPI threading for PREEMPT_RT wen.yang
2026-01-18 16:15 ` [PATCH 6.6 1/3] net: napi_schedule_rps() cleanup wen.yang
2026-01-18 16:17 ` [PATCH 6.1 " wen.yang
2026-01-18 16:28 ` wen.yang
2026-01-18 16:15 ` [PATCH 6.6 2/3] net: Remove conditional threaded-NAPI wakeup based on task state wen.yang
2026-01-18 16:17 ` [PATCH 6.1 " wen.yang
2026-01-18 16:28 ` wen.yang
2026-01-18 16:15 ` [PATCH 6.6 3/3] net: Allow to use SMP threads for backlog NAPI wen.yang
2026-01-18 16:17 ` [PATCH 6.1 " wen.yang
2026-01-18 16:28 ` wen.yang
2026-01-18 16:31 ` wen.yang
2026-01-19 16:25 ` [PATCH 6.6 " Jakub Kicinski
2026-01-19 16:30 ` Sebastian Andrzej Siewior [this message]
2026-01-20 6:03 ` Greg Kroah-Hartman
2026-01-20 8:01 ` Sebastian Andrzej Siewior
2026-01-20 9:21 ` Greg Kroah-Hartman
2026-01-20 10:38 ` Sebastian Andrzej Siewior
2026-02-04 13:54 ` Greg Kroah-Hartman
2026-02-07 20:26 ` Wen Yang
2026-01-18 16:17 ` [PATCH 6.1 0/3] net: Backlog NAPI threading for PREEMPT_RT wen.yang
2026-01-18 16:28 ` wen.yang
2026-01-18 17:02 ` [PATCH 6.6 " Wen Yang
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