RE: Re: [Linux-ia64] Re: Lockups on 2.4.1

["Chris McDermott" <mcdermoc@us.ibm.com>]

Definitely seeing this (at least the problem I reported) on a
2.4.1-010131 kernel.

Chris

> Just my observation:
>
> The improvement I have seen using the 2.4.1-010131 kernel from any 2.4.0
> ia64 kernel is major enough to upgrade.
>
> I have not seen any lockups of the sort I have seen on this thread.
>
> I am running a 4 proc Lion with 4 Gigs memory, Bios 71.
>
> If you are seeing this issue on 2.4.0 I would upgrade.
>
> --ken


-----Original Message-----
From: Jack Steiner [mailto:steiner@sgi.com]
Sent: Wednesday, February 21, 2001 11:48 AM
To: linux-ia64@linuxia64.org
Subject: Re: Re: [Linux-ia64] Re: Lockups on 2.4.1


> Anyway, I have ITPs connected to the IBM hardware and have noticed that
> when the lockup occurs, and we lose video, at least one of the CPUs is
> executing in flush_tlb_no_ptcg() or handle_IPI(), in the 'do' loop where
> TLB
> entries are being purged. What I have observed is that the end address
and
> the start address are in completely different regions. Usually, the start
> address
> is in region register 1 (address of 0x2000XXXXXXXXXXXX) and the end
address
> is in region register 3 (address of 0x6000XXXXXXXXXXXX). I don't know if
> this
> is the same problem I am seeing on the Lion, but I plan to connect and
ITP
> and
> a serial console (although we haven't been able to get one to work yet on
> the
> Lion with BIOS 71) to see if the symptoms are the same.

FWIW, we have seen EXACTLY the same hang running here on our system.
The start/end addresses for the purge cross region boundaries.


We are running a 2.4.0 kernel.


--
Thanks

Jack Steiner    (651-683-5302)   (vnet 233-5302)      steiner@sgi.com


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