linux-kernel - Re: [PATCH v2] net: dsa: drop some VLAs in switch.c

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Message-ID: <CAJHCu1L_hRWpo2pjyEiHdbmD18GHao1bevVDCJ84z10Ch1Cb1g@mail.gmail.com>
Date:   Tue, 8 May 2018 12:32:49 +0200
From:   Salvatore Mesoraca <s.mesoraca16@...il.com>
To:     David Laight <David.Laight@...lab.com>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Kees Cook <keescook@...omium.org>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Subject: Re: [PATCH v2] net: dsa: drop some VLAs in switch.c

2018-05-08 11:39 GMT+02:00 David Laight <David.Laight@...lab.com>:
> From: Salvatore Mesoraca
>> Sent: 07 May 2018 20:03
> ...
>> This optimization will save us an allocation when number of ports is
>> less than 32 or 64 (depending on arch).
>> IMHO it's useful, if you consider that, right now, DSA works only with
>> 12-ports switches.
>
> Why not just error out if the number of ports is greater than the compile-time
> limit?
>
> Worry about dynamic allocation if you need a lot more than 64 ports.

v1 has been NAK-ed by maintainers because they don't want limits on how
many ports a switch can have.

Salvatore