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: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <24f2dd3e-fb00-894b-0cdc-4ad1e4345a06@kernel.org>
Date:   Wed, 23 Aug 2023 09:14:15 +0200
From:   Jesper Dangaard Brouer <hawk@...nel.org>
To:     Ratheesh Kannoth <rkannoth@...vell.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     sgoutham@...vell.com, gakula@...vell.com, sbhatta@...vell.com,
        hkelam@...vell.com, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, hawk@...nel.org,
        alexander.duyck@...il.com, ilias.apalodimas@...aro.org,
        linyunsheng@...wei.com,
        Alexander Lobakin <aleksander.lobakin@...el.com>
Subject: Re: [PATCH v2 net] octeontx2-pf: fix page_pool creation fail for
 rings > 32k



On 23/08/2023 04.53, Ratheesh Kannoth wrote:
> octeontx2 driver calls page_pool_create() during driver probe()
> and fails if queue size > 32k. Page pool infra uses these buffers
> as shock absorbers for burst traffic. These pages are pinned down
> over time as working sets varies, due to the recycling nature
> of page pool, given page pool (currently) don't have a shrinker
> mechanism, the pages remain pinned down in ptr_ring.
> Instead of clamping page_pool size to 32k at
> most, limit it even more to 2k to avoid wasting memory.
> 
> This have been tested on octeontx2 CN10KA hardware.
> TCP and UDP tests using iperf shows no performance regressions.
> 
> Fixes: b2e3406a38f0 ("octeontx2-pf: Add support for page pool")
> Suggested-by: Alexander Lobakin<aleksander.lobakin@...el.com>
> Reviewed-by: Sunil Goutham<sgoutham@...vell.com>
> Signed-off-by: Ratheesh Kannoth<rkannoth@...vell.com>

LGTM

Acked-by: Jesper Dangaard Brouer <hawk@...nel.org>

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ