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Date:      Fri, 19 Jun 2009 09:38:03 +0400
From:      pluknet <pluknet@gmail.com>
To:        Adrian Chadd <adrian@freebsd.org>
Cc:        freebsd-stable@freebsd.org, Ed Maste <emaste@freebsd.org>
Subject:   Re: 6.2 sporadically locks up
Message-ID:  <a31046fc0906182238g55d8e0c6s2bc497e664379e2d@mail.gmail.com>
In-Reply-To: <d763ac660906182202i1478b812u93965a2a98e92310@mail.gmail.com>
References:  <a31046fc0906160323s3e4ec60bxb585bb29f9f3a02a@mail.gmail.com> <200906160830.29721.jhb@freebsd.org> <a31046fc0906160803n284604bcs741e6b038079ed12@mail.gmail.com> <20090617142952.GA73887@sandvine.com> <a31046fc0906170745i51583493kf8b0d9a8bdd6b631@mail.gmail.com> <d763ac660906182202i1478b812u93965a2a98e92310@mail.gmail.com>

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2009/6/19 Adrian Chadd <adrian@freebsd.org>:
> Just modify the driver slightly to hijack a different device prefix :)
>

Hi, Adrian.

That's where I just go if I should have to.

-       .d_name =3D       "aac",
+       .d_name =3D       "aacu", (or vise versa)

While here, I'd like to give some summary about locking up with
 "irq17:bce1 aacu0" vs arcconf scenario.

Abstract: we have a number of boxes with IBM ServeRAID 8k on 6.2.

That scenario takes place only with aacu b15753, and not with b15411
(at least not noticed). We take a decision some time ago to move some
boxes to 6.4 (and leave vendor aacu b15753 there as it's) to see how
it goes. Until now (2 or 3 weeks) there were no lockup.
I hope it will so farther..


>
>
> Adrian
>
> 2009/6/17 pluknet <pluknet@gmail.com>:
>> 2009/6/17 Ed Maste <emaste@freebsd.org>:
>>> On Tue, Jun 16, 2009 at 07:03:34PM +0400, pluknet wrote:
>>>
>>>> As for allpcpu, I often see the picture, when one CPU runs the "irq17:
>>>> bce1 aacu0" thread
>>>> and another one runs arcconf. I wonder if that might be a source of
>>>> bad locking or races, or..
>>>> The arcconf utility uses ioctl that goes into aac/aacu(4) internals.
>>>
>>> Do you see the same result w/ the in-tree aac(4) driver as opposed to
>>> Adaptec's version?
>>>
>>> -Ed
>>>
>>
>> [It's quite hard to move back to aac(4) as that requires fstab update
>> [ aacdu0 -> aacd0]
>> =A0and instant reboot, because we use quotas and quotacheck looks into /=
etc/fstab.
>> Such preparations as fstab update and commenting out load_aacu=3D"YES" w=
ill give
>> discrepancy between fstab and actual mount points.]
>>
>> I will try anyway. Thank you for your help.
>>


--=20
wbr,
pluknet



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