Re: [PATCH] ipvs: Move defense_work to system_dfl_long_wq

Simon Horman <[email protected]> Thu, 19 Mar 2026 16:36:37 +0000
Newsgroups org.kernel.vger.lvs-devel,org.kernel.vger.linux-kernel,org.kernel.vger.netdev,org.kernel.vger.netfilter-devel
Message-ID <[email protected]>
On Tue, Mar 17, 2026 at 03:00:59PM +0100, Ismael Luceno wrote:
> Under synflood conditions binding defense_work to system_long_wq may
> pin it to a saturated CPU.
> 
> We've observed improved throughtput on a DPDK/VPP application with
> this change. We attribute this to the reduced context switching.
> 
> The defense_work handler has no per-CPU data dependencies and no cache
> locality requirements that would justify this.
> 
> Signed-off-by: Ismael Luceno <[email protected]>
> ---
> Depends-on: wq/for-7.1 c116737e972e ("workqueue: Add system_dfl_long_wq for long unbound works")

Hi Ismael,

This patch seems suitable to be targeted at the nf-next tree.
That should be annotated like this:

Subject [PATCH nf-next] ipvs: ...

And the patch must compile when applied to it's target tree.
So you'll need to repost this patch once the dependency above
has reached that tree.