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Date:      Wed, 28 Apr 2010 04:58:25 -0700
From:      Randall Stewart <rrs@lakerest.net>
To:        Rui Paulo <rpaulo@freebsd.org>
Cc:        freebsd-mips@freebsd.org
Subject:   Re: SMP support for XLR processors.
Message-ID:  <B366987E-73FF-4EA7-BECC-1C965E7FD840@lakerest.net>
In-Reply-To: <8DA4B46E-7923-4C01-9345-75C7A598C023@freebsd.org>
References:  <w2z98a59be81004171540t2f0d5193nca2ec9e2540502e2@mail.gmail.com> <6BDB3874-D779-45A6-ABAE-4C331D78A189@lakerest.net> <y2m98a59be81004190657kce2488b0p86a725b1175cb14b@mail.gmail.com> <l2n98a59be81004200252lf1d0a372pfae8ac5f55440e58@mail.gmail.com> <7BEFA3F5-97AE-477C-9DD3-EF1C4B7DCEB0@freebsd.org> <BC57A6F0-4F2E-47F4-92BF-849AD18FC004@freebsd.org> <o2n98a59be81004200349yefc11499n4497544d6dbd9d0b@mail.gmail.com> <C0874E32-D2F2-4A29-B868-CADDE47EB0C3@freebsd.org> <j2q98a59be81004200406xca7ac107o6435c4e9c1b8b81f@mail.gmail.com> <3820374E-010D-40EA-A596-4AF1694B4119@freebsd.org> <r2s98a59be81004261239id979645er957ce9f7bb1c0437@mail.gmail.com> <8DA4B46E-7923-4C01-9345-75C7A598C023@freebsd.org>

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Yeah,

There are still lots of issues with the SMP patches...

Have you tested without PREEMPTION?

Note that I still get a crash without it.. but its
centered in an IPI with a spin-lock held to long during
a buildworld -j16

R
On Apr 28, 2010, at 4:45 AM, Rui Paulo wrote:

> On 26 Apr 2010, at 20:39, C. Jayachandran wrote:
>
>> On Tue, Apr 20, 2010 at 4:42 PM, Rui Paulo <rpaulo@freebsd.org>  
>> wrote:
>>> On 20 Apr 2010, at 12:06, C. Jayachandran wrote:
>>>> I'm not seeing the issue here(my output for ref below).  The rge  
>>>> patch
>>>> should not really make a difference - but it will be good to try  
>>>> with
>>>> that.  The only other difference I can think of between our  
>>>> configs is
>>>> MFS root/NFS root and rge0/rge1 - but none of these should affect  
>>>> the
>>>> message ring threads.  Can you send me the config you use?
>>>
>> ...
>>> I use the basic XLR config with some mods:
>>> +options        PREEMPTION              # Enable kernel thread  
>>> preemption
>> ...
>>
>> As Randall said, this may be the issue, I haven't had much time to
>> look at this, since I'm still looking at another issue. Do you still
>> have the issue without PREEMPTION?
>
> Just tested on the most recent HEAD and yes I still have the issue :-(
>
> Regards,
> --
> Rui Paulo
>
>

------------------------------
Randall Stewart
803-317-4952 (cell)
803-345-0391(direct)




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