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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <252667f3-47b2-4d1f-86d6-c34ba43a6d47@intel.com>
Date: Mon, 7 Jul 2025 11:32:20 -0700
From: Jacob Keller <jacob.e.keller@...el.com>
To: Jaroslav Pulchart <jaroslav.pulchart@...ddata.com>
CC: Maciej Fijalkowski <maciej.fijalkowski@...el.com>, Jakub Kicinski
	<kuba@...nel.org>, Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
	"Damato, Joe" <jdamato@...tly.com>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
	Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>, "Czapnik, Lukasz"
	<lukasz.czapnik@...el.com>, "Dumazet, Eric" <edumazet@...gle.com>, "Zaki,
 Ahmed" <ahmed.zaki@...el.com>, Martin Karsten <mkarsten@...terloo.ca>, "Igor
 Raits" <igor@...ddata.com>, Daniel Secik <daniel.secik@...ddata.com>, "Zdenek
 Pesek" <zdenek.pesek@...ddata.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 7/3/2025 9:16 AM, Jacob Keller wrote:
> On 7/2/2025 11:46 PM, Jaroslav Pulchart wrote:
>>> think iperf doesn't do that, which might be part of whats causing this
>>> issue. I'm going to try to see if I can generate such fragmentation to
>>> confirm. Is your MTU kept at the default ethernet size?
>>
>> Our MTU size is set to 9000 everywhere.
>>
> 
> Ok. I am re-trying with MTU 9000 and using some traffic generated by wrk
> now. I do see much larger memory use (~2GB) when using MTU 9000, so that
> tracks with what your system shows. Currently its fluctuating between
> 1.9 and 2G. I'll leave this going for a couple of days while on vacation
> and see if anything pops up.
> 
> Thanks,
> Jake

Good news! After several days of running a wrk and iperf3 workload with
9k MTU, I see a significant increase in the memory usage from the page
allocations:

   7.3G   953314 drivers/net/ethernet/intel/ice/ice_txrx.c:682 [ice]
func:ice_alloc_mapped_page

~5GB extra.

At least I can reproduce this now. Its unclear how long it took since I
was out on vacation from Wednesday through until now.

I do have a singular hypothesis regarding the way we're currently
tracking the page count, (just based on differences between ice and
i40e). I'm going to attempt to align with i40e and re-run the test.
Hopefully I'll have some more information in a day or two.


Download attachment "OpenPGP_signature.asc" of type "application/pgp-signature" (237 bytes)