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Date:      Thu, 20 Aug 2015 21:34:54 +0200
From:      Svatopluk Kraus <onwahe@gmail.com>
To:        Dmitry Marakasov <amdmi3@amdmi3.ru>
Cc:        Adrian Chadd <adrian.chadd@gmail.com>,  "freebsd-arm@FreeBSD.org" <freebsd-arm@freebsd.org>, Ian Lepore <ian@freebsd.org>
Subject:   Re: Instability likely related to new pmap on Cubieboard A10
Message-ID:  <CAFHCsPVrNFEDkq-j99j7a5GDBN2u7kRJRGk6Ggym2v_dre%2BN3A@mail.gmail.com>
In-Reply-To: <20150820185417.GB1245@hades.panopticon>
References:  <20150819002103.GC79354@hades.panopticon> <1439944961.242.150.camel@freebsd.org> <20150819013834.GD79354@hades.panopticon> <CAJ-VmokJv=nvcEkBogWeNJT65MosxnFcaitWn8FXJu32eahSdw@mail.gmail.com> <20150819120753.GH79354@hades.panopticon> <CAFHCsPVSGuWWY97ac2QVGAE77Lz2gJ12wDLpzH_kNdZsLQxh%2BQ@mail.gmail.com> <20150819134708.GJ79354@hades.panopticon> <CAFHCsPVwZS_rCnvKztg7g2%2BvrOBwQpqpPYyA2=hCLGiiU5=mrQ@mail.gmail.com> <20150819232836.GA1245@hades.panopticon> <CAFHCsPUfMhkCjiip7o6ZwGx4jNb1-Xqptsj9h_CzZ8xtfZswiA@mail.gmail.com> <20150820185417.GB1245@hades.panopticon>

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On Thu, Aug 20, 2015 at 8:54 PM, Dmitry Marakasov <amdmi3@amdmi3.ru> wrote:
> * Svatopluk Kraus (onwahe@gmail.com) wrote:
>
>> I have not noticed until now that you are running Cortex A8. We have
>> an open issue on BBB which is A8 too. Can you try to disable promotion
>> - i.e. edit the following line in pmap-v6-new.c:
>>
>> static int sp_enabled = 1;
>>
>> and set the variable to zero.
>
> It doesn't help:
>
> https://people.freebsd.org/~amdmi3/pmap2.log
>
>> If it helps, set it again to 1 and try attached patch, please.
>>
>> If neither the first nor the seconf attemp will work, can you send me
>> output like before but from another panic. I would like to see
>> diference.
>
> Just for the case, with patch and sp_enabled back to 1:
>
> https://people.freebsd.org/~amdmi3/pmap3.log
>

Thanks. Meantime, I tried most recent HEAD on pandaboard and
beaglebone black and no problem there. Do you have enabled INVARIANTS
and INVARIANT_SUPPORT in your config? If not, can you try it with
them?

Svata



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