From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jack Steiner Date: Wed, 21 Feb 2001 19:48:14 +0000 Subject: Re: Re: [Linux-ia64] Re: Lockups on 2.4.1 Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org > 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