netdev - Re: [PATCH] net: stmmac: Fix page pool size

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Message-ID: <20190922153132.0c328fe7@cakuba.netronome.com>
Date:   Sun, 22 Sep 2019 15:31:32 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Thierry Reding <thierry.reding@...il.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <joabreu@...opsys.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jon Hunter <jonathanh@...dia.com>,
        Bitan Biswas <bbiswas@...dia.com>, netdev@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH] net: stmmac: Fix page pool size

On Fri, 20 Sep 2019 19:01:27 +0200, Thierry Reding wrote:
> From: Thierry Reding <treding@...dia.com>
> 
> The size of individual pages in the page pool in given by an order. The
> order is the binary logarithm of the number of pages that make up one of
> the pages in the pool. However, the driver currently passes the number
> of pages rather than the order, so it ends up wasting quite a bit of
> memory.
> 
> Fix this by taking the binary logarithm and passing that in the order
> field.
> 
> Signed-off-by: Thierry Reding <treding@...dia.com>

Since this is a fix could we get a Fixes tag pointing to the commit
which introduced the regression?