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Date: Thu, 13 Jul 2023 09:27:26 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Jesper Dangaard Brouer <jbrouer@redhat.com>
Cc: brouer@redhat.com, netdev@vger.kernel.org, almasrymina@google.com,
 hawk@kernel.org, ilias.apalodimas@linaro.org, edumazet@google.com,
 dsahern@gmail.com, michael.chan@broadcom.com, willemb@google.com, Ulrich
 Drepper <drepper@redhat.com>, Luigi Rizzo <lrizzo@google.com>, Luigi Rizzo
 <rizzo@iet.unipi.it>, farshin@kth.se
Subject: Re: [RFC 00/12] net: huge page backed page_pool
Message-ID: <20230713092726.161f9768@kernel.org>
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On Thu, 13 Jul 2023 12:07:06 +0200 Jesper Dangaard Brouer wrote:
> > For the ptr_ring I was considering bumping the refcount of pages
> > allocated from outside the 1G pool, so that they do not get recycled.
> > I deferred optimizing that until I can get some production results.
> > The extra CPU cost of loss of recycling could outweigh the IOTLB win.
> > 
> > All very exciting stuff, I wish the days were slightly longer :)
> 
> Know the problem of (human) cycles in a day.
> Rizzo's article describes a lot of experiments, that might save us/you 
> some time.

Speaking of saving time - if anyone has patches to convert mlx4 to page
pool I'd greatly appreciate!