linux-kernel - Re: [PATCH v2 net-next 05/15] net: sgi: ioc3-eth: allocate space for desc rings only once

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Message-Id: <20190830100926.343e7c2c7f3cd059c359bdd4@suse.de>
Date:   Fri, 30 Aug 2019 10:09:26 +0200
From:   Thomas Bogendoerfer <tbogendoerfer@...e.de>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH v2 net-next 05/15] net: sgi: ioc3-eth: allocate space
 for desc rings only once

On Thu, 29 Aug 2019 15:05:04 -0700
Jakub Kicinski <jakub.kicinski@...ronome.com> wrote:

> On Fri, 30 Aug 2019 00:00:58 +0200, Thomas Bogendoerfer wrote:

> > Out of curiosity does kcalloc/kmalloc_array give me the same guarantees about
> > alignment ? rx ring needs to be 4KB aligned, tx ring 16KB aligned.
> 
> I don't think so, actually, I was mostly worried you are passing
> address from get_page() into kfree() here ;) But patch 11 cures that,
> so that's good, too.

I realized that after sending my last mail. I'll fix that in v3 even
it's just a transient bug.

Thomas.

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