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List:       suse-oracle
Subject:    Re: AW: [suse-oracle] kernel bug
From:       "Alexei_Roudnev" <Alexei_Roudnev () exigengroup ! com>
Date:       2006-12-18 21:05:39
Message-ID: 38ae01c722e8$453cd480$6f31a8c0 () sjc ! exigengroup ! com
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Race conditions, may be? It can explain, why this bug is so rare.

<frank.westheider@westheider.de> wrote:
> Hi Arun,
>
> Sorry, but we filed a bug...with both parties, Novell AND Oracle.
> We escalated this case at Novell, because it's a kernel bug...no
change for
> the last 4-6 weeks.
> But...as you see...no solution after about 3 months...
>
> I took a deep look into the kernel-code, espacially the part of the
bug in
> aio.c
> As far as i see, it looks like a list-corruption of the list of
outstanding
> io-requests.
> So i don't think that it is driver-specific...it looks like a general
bug.
>
> That it is working for some customers: it depends on the duration and
number
>
> of parallel requests if it happens or not...and these parameter
determine
> only the timeline, when it is occuring.
>
> Bye
>     Frank
>
> ----- Original Message ----- 
> From: "Arun Singh" <Arun.Singh@novell.com>
> To: "'SuSE MailingList'" <suse-oracle@suse.com>
> Sent: Monday, December 18, 2006 7:13 PM
> Subject: Re: AW: [suse-oracle] kernel bug
>
>
> Hi Frank,
>
> This patch has fixed/worked for some customers (not all). I will
highly
> recommend to file bug as this will help to raise severity of this
bug. This
> is a serious kernel AIO bug and only workaround at this time is to
disable
> AIO (as you mentioned).
>
> Regards,
> Arun
>
> <frank.westheider@westheider.de> wrote:
>> Hi!
>>
>> The patch is not helping.
>> We are currently running 2.6.5-7.282.PTF.165140-smp
>>
>> We already tried this...opened a TAR with Oracle, openend an issue
with
>> Novell...got 2 fixes from Novell, but both are not helping around
the bug.
>> The database crashes after approx. 1 week of heavy load and you have
to
>> restart the machine to free the ipc-resources.
>>
>> After several attempts to speed up Novell fixing this issue...we
gave up
>> and
>> turned off Async-IO. Now we're hoping for the next service-pack to
fix
>> this
>> issue.
>>
>> Sad...but Novell was not really helping us....they are currently
only
>> stealing time and hoping, that we close the case and work without
>> async-io.
>>
>> Bye
>>   Frank
>>
>> -----Ursprüngliche Nachricht-----
>> Von: Arun Singh [mailto:Arun.Singh@novell.com]
>> Gesendet: Montag, 18. Dezember 2006 17:03
>> An: SuSE MailingList
>> Betreff: Re: [suse-oracle] kernel bug
>>
>> Hi Toni,
>>
>> <Anton.Dischner@med.uni-muenchen.de> wrote:
>>> an advice for Oracle 9.x was to
>>>
>>>  >Correct procedure will be upgrade to latest kernel (.282) and
ask
>>
>>> Novell
>>>  >Tech support to provide a fix (PTF) for this problem.
>>>
>>> Is this the way for Oracle 10.1.0.5 too?
>>>
>>> We are running kernel 2.6.5-7.257
>>
>> Yes, Please apply latest kernel which is .282 and file bug with NTS,
If
>> it doesn't help.
>>
>> Regards,
>> Arun


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