From: Simon Horman <horms@kernel.org>
To: Frederic Weisbecker <frederic@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
"David S. Miller" <davem@davemloft.net>,
David Ahern <dsahern@kernel.org>, Julian Anastasov <ja@ssi.bg>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Pablo Neira Ayuso <pablo@netfilter.org>,
Jozsef Kadlecsik <kadlec@netfilter.org>,
netdev@vger.kernel.org, lvs-devel@vger.kernel.org,
netfilter-devel@vger.kernel.org, coreteam@netfilter.org
Subject: Re: [PATCH net] ipvs: Fix estimator kthreads preferred affinity
Date: Wed, 27 Aug 2025 11:48:19 +0100 [thread overview]
Message-ID: <20250827104819.GA26074@horms.kernel.org> (raw)
In-Reply-To: <20250729120659.201095-1-frederic@kernel.org>
On Tue, Jul 29, 2025 at 02:06:59PM +0200, Frederic Weisbecker wrote:
> The estimator kthreads' affinity are defined by sysctl overwritten
> preferences and applied through a plain call to the scheduler's affinity
> API.
>
> However since the introduction of managed kthreads preferred affinity,
> such a practice shortcuts the kthreads core code which eventually
> overwrites the target to the default unbound affinity.
>
> Fix this with using the appropriate kthread's API which will carry the
> desired affinity and maintain it across CPU hotplug events and CPU
> isolation constraints.
>
> Fixes: d1a89197589c ("kthread: Default affine kthread to its preferred NUMA node")
> Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Simon Horman <horms@kernel.org>
prev parent reply other threads:[~2025-08-27 10:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-29 12:06 [PATCH net] ipvs: Fix estimator kthreads preferred affinity Frederic Weisbecker
2025-08-27 10:48 ` Simon Horman [this message]
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