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: <CO1PR11MB508931FBA3D5DFE7D8F07844D6BC2@CO1PR11MB5089.namprd11.prod.outlook.com>
Date: Thu, 17 Apr 2025 17:52:37 +0000
From: "Keller, Jacob E" <jacob.e.keller@...el.com>
To: Jakub Kicinski <kuba@...nel.org>
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)



> -----Original Message-----
> From: Jakub Kicinski <kuba@...nel.org>
> Sent: Wednesday, April 16, 2025 5:13 PM
> 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; 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.

Regardless, it should still be ~64KB even in that case which is a far cry from eating all available memory. Something else must be going on....

Thanks,
Jake