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Date:      Thu, 19 Jan 2017 11:24:11 -0200
From:      Luiz Otavio O Souza <lists.br@gmail.com>
To:        Vincenzo Maffione <v.maffione@gmail.com>
Cc:        FreeBSD Net <freebsd-net@freebsd.org>,  Giuseppe Lettieri <giuseppe.lettieri73@gmail.com>, Luigi Rizzo <luigi@freebsd.org>
Subject:   Re: Fix netmap emulated mode for FreeBSD 11 versions
Message-ID:  <CAB=2f8wHfRmkWn99UAVVZoJo4nS-CowA0_Gfar0GiOyRfX6bqA@mail.gmail.com>
In-Reply-To: <CA%2B_eA9hBhfRfeyQ=z5u--LFaD8xLJrCwFhZdNTOcSaOhKwGWFg@mail.gmail.com>
References:  <CA%2B_eA9hBhfRfeyQ=z5u--LFaD8xLJrCwFhZdNTOcSaOhKwGWFg@mail.gmail.com>

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On 19 January 2017 at 09:11, Vincenzo Maffione wrote:
> Hi,
>
>   A change in mb_free_ext() introduced in FreeBSD 11 versions broke the
> transmission support for netmap in emulated mode. This means immediate
> kernel crashes for netmap users in non-native (emulated) mode.
>
> This problem has been fixed in FreeBSD-12-CURRENT, which contains a recent
> version of Netmap. However, FreeBSD 11 versions (release, stable) are still
> affected, as they contain old Netmap versions.
> Is it possible to push the fix (provided by me) to the relevant
> release/stable branches? What is the procedure (I'm not familiar with the
> FreeBSD release engineering process)?

Hi Vincenzo,

Yeah, I saw that trying netmap on ARM (running with emulated drivers)
and I can confirm that it is fixed on -head.

Please, send me the fix and I'll get it committed on stable/11 (this
is a common situation and the fix can be committed directly into the
affected branch).

Thanks!
Luiz



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