netdev - Re: [Intel-wired-lan] Increased memory usage on NUMA nodes with ICE driver after upgrade to 6.13.y (regression in commit 492a044508ad)

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Message-ID: <20250416171311.30b76ec1@kernel.org>
Date: Wed, 16 Apr 2025 17:13:11 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: "Keller, Jacob E" <jacob.e.keller@...el.com>
Cc: Jaroslav Pulchart <jaroslav.pulchart@...ddata.com>, "Kitszel,
 Przemyslaw" <przemyslaw.kitszel@...el.com>, "Damato, Joe"
 <jdamato@...tly.com>, "intel-wired-lan@...ts.osuosl.org"
 <intel-wired-lan@...ts.osuosl.org>, "netdev@...r.kernel.org"
 <netdev@...r.kernel.org>, "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
 Igor Raits <igor@...ddata.com>, Daniel Secik <daniel.secik@...ddata.com>,
 Zdenek Pesek <zdenek.pesek@...ddata.com>, "Dumazet, Eric"
 <edumazet@...gle.com>, Martin Karsten <mkarsten@...terloo.ca>, "Zaki,
 Ahmed" <ahmed.zaki@...el.com>, "Czapnik, Lukasz"
 <lukasz.czapnik@...el.com>, "Michal Swiatkowski"
 <michal.swiatkowski@...ux.intel.com>
Subject: Re: [Intel-wired-lan] Increased memory usage on NUMA nodes with ICE
 driver after upgrade to 6.13.y (regression in commit 492a044508ad)

On Wed, 16 Apr 2025 22:57:10 +0000 Keller, Jacob E wrote:
> > > And you're reverting just and exactly 492a044508ad13 ?
> > > The memory for persistent config is allocated in alloc_netdev_mqs()
> > > unconditionally. I'm lost as to how this commit could make any
> > > difference :(  
> > 
> > Yes, reverted the 492a044508ad13.  
> 
> Struct napi_config *is* 1056 bytes

You're probably looking at 6.15-rcX kernels. Yes, the affinity mask
can be large depending on the kernel config. But report is for 6.13,
AFAIU. In 6.13 and 6.14 napi_config was tiny.