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#1 (**permalink**) 01-05-2008, 07:21 AM

Hello,

Im getting a spurious crash fixed by IBM as stated below -involving
hd_terminate(). It happens on systems that have jf2 as filesystem type
on aix 5.3 (running mp kernel). Can someone confirm if they get this
crash and/or whether it is an IBM bug or something that can be
triggered by bad ke code?
------------------------------

APAR: IY21904 COMPID: 5765C3403 REL: 430
ABSTRACT: HD_TERMINATE(STRIPE)

PROBLEM DESCRIPTION:
A system experiencing this problem would crash at the
assert in hd_terminate, and analysis of the dump would
indicate that the logical buffer being terminated is
actually a striped physical buffer.

PROBLEM SUMMARY:
System asserts in hd_terminate

PROBLEM CONCLUSION:
Fix internal logic for striped and mirrored LVs
------------------------------
thanks
-kamal

#2 (**permalink**) 01-05-2008, 07:21 AM

Hi Kamal...

"Kamal R. Prasad" <kamalp@acm.org> wrote in message
news:1125915088.450348.15510@g49g2000cwa.googlegro ups.com...
> Hello,
>
> Im getting a spurious crash fixed by IBM as stated below -involving
> hd_terminate(). It happens on systems that have jf2 as filesystem type
> on aix 5.3 (running mp kernel). Can someone confirm if they get this
> crash and/or whether it is an IBM bug or something that can be
> triggered by bad ke code?
> ------------------------------
>
> APAR: IY21904 COMPID: 5765C3403 REL: 430
> ABSTRACT: HD_TERMINATE(STRIPE)
>
> PROBLEM DESCRIPTION:
> A system experiencing this problem would crash at the
> assert in hd_terminate, and analysis of the dump would
> indicate that the logical buffer being terminated is
> actually a striped physical buffer.
>
> PROBLEM SUMMARY:
> System asserts in hd_terminate
>
> PROBLEM CONCLUSION:
> Fix internal logic for striped and mirrored LVs
> ------------------------------

The above abstract shows that IBM has an "Open" APAR against the AIX 5.3
code for the symptom described. I.E. they recognise there is a problem in
their code that will, eventually be fixed and thus "Close" the APAR, in due
course.
--
Regards,
Tim Clarke (a.k.a. WBST)

#3 (**permalink**) 01-05-2008, 07:21 AM

Tim Clarke wrote:
> Hi Kamal...
>
> "Kamal R. Prasad" <kamalp@acm.org> wrote in message
> news:1125915088.450348.15510@g49g2000cwa.googlegro ups.com...
> > Hello,
> >
> > Im getting a spurious crash fixed by IBM as stated below -involving
> > hd_terminate(). It happens on systems that have jf2 as filesystem type
> > on aix 5.3 (running mp kernel). Can someone confirm if they get this
> > crash and/or whether it is an IBM bug or something that can be
> > triggered by bad ke code?
> > ------------------------------
> >
> > APAR: IY21904 COMPID: 5765C3403 REL: 430
> > ABSTRACT: HD_TERMINATE(STRIPE)
> >
> > PROBLEM DESCRIPTION:
> > A system experiencing this problem would crash at the
> > assert in hd_terminate, and analysis of the dump would
> > indicate that the logical buffer being terminated is
> > actually a striped physical buffer.
> >
> > PROBLEM SUMMARY:
> > System asserts in hd_terminate
> >
> > PROBLEM CONCLUSION:
> > Fix internal logic for striped and mirrored LVs
> > ------------------------------
>
> The above abstract shows that IBM has an "Open" APAR against the AIX 5.3
> code for the symptom described. I.E. they recognise there is a problem in
> their code that will, eventually be fixed and thus "Close" the APAR, in due
> course.

Tim ,

Thanks for the info. I happened to interpret it as -problem has been
determined and the patch IY21904 should fix the problem. There is
something in my kext that is causing this problem to show up every
minute. Does someone know the trigger pt for this crash i.e. what
inside a kext could trigger it to happen frequently? Also, is there a
patch in the works that could fix this problem on AIX 5.3?

thanks
-kamal

> --
> Regards,
> Tim Clarke (a.k.a. WBST)

#4 (**permalink**) 01-05-2008, 07:21 AM

"Kamal R. Prasad" <kamalp@acm.org> wrote in message
news:1125993654.044815.297800@g14g2000cwa.googlegr oups.com...
>
> Tim Clarke wrote:
> > Hi Kamal...
> >
> > "Kamal R. Prasad" <kamalp@acm.org> wrote in message
> > news:1125915088.450348.15510@g49g2000cwa.googlegro ups.com...
> > > Hello,
> > >
> > > Im getting a spurious crash fixed by IBM as stated below -involving
> > > hd_terminate(). It happens on systems that have jf2 as filesystem type
> > > on aix 5.3 (running mp kernel). Can someone confirm if they get this
> > > crash and/or whether it is an IBM bug or something that can be
> > > triggered by bad ke code?
> > > ------------------------------
> > >
> > > APAR: IY21904 COMPID: 5765C3403 REL: 430
> > > ABSTRACT: HD_TERMINATE(STRIPE)
> > >
> > > PROBLEM DESCRIPTION:
> > > A system experiencing this problem would crash at the
> > > assert in hd_terminate, and analysis of the dump would
> > > indicate that the logical buffer being terminated is
> > > actually a striped physical buffer.
> > >
> > > PROBLEM SUMMARY:
> > > System asserts in hd_terminate
> > >
> > > PROBLEM CONCLUSION:
> > > Fix internal logic for striped and mirrored LVs
> > > ------------------------------
> >
> > The above abstract shows that IBM has an "Open" APAR against the AIX 5.3
> > code for the symptom described. I.E. they recognise there is a problem
in
> > their code that will, eventually be fixed and thus "Close" the APAR, in
due
> > course.
>
> Tim ,
>
> Thanks for the info. I happened to interpret it as -problem has been
> determined and the patch IY21904 should fix the problem. There is
> something in my kext that is causing this problem to show up every
> minute. Does someone know the trigger pt for this crash i.e. what
> inside a kext could trigger it to happen frequently? Also, is there a
> patch in the works that could fix this problem on AIX 5.3?

Not quite true, the APAR documents the "problem" and it's ongoing
status/resolution and, eventually, the PTF that "fixes" the problem for a
specific Version+Release and/or any Correlated PTFs for "other"
Version+Release levels. This APARs "environment" is AIX V4.3 not AIX V5.3,
so there's a notional APAR open against all higher levels than AIX V4.3. If
you have a support option then re-report the problem quoting the APAR hit
against AIX V4.3, this will "kick" the priority of the development of the
V5.3 Correlated fix up a notch.
--
Regards,
Tim Clarke (a.k.a. WBST)

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crash involving hd_terminate on aix 5.3