On Tue, Jun 15, 2004 at 12:22:34PM +0300, astesin_at_ukrtelecom.net wrote: > Hello Xin, > > > I got a strange problem when having HTT enabled on a P4 2.8E > > processor. When rebooting the system, after the disk sync and > > the system is going to restart, it crashes and generates a > > crashdump. Strangely, the panic message seems to be corrupted. > > That's exactly what I'm seeing on P4 3.0E (yes, also `E') and Intel > S875WP1-E motherboard > ftp://download.intel.com/support/motherboards/server/s875wp1-e/tps.pdf , but > it even doesn't do crashdump, just freeses. And not each time but maybe 3-4 > of 5 reboots. BTW running `halt' instead of reboot worked. Sorry I didn't > had time this night to try a kernel with debugging. Ah... Yes, I'm using Intel motherboard too, however, with a different chipset. Are you sure that the system is actually frozen? In my case, nothing appeared in console, however, pressing Ctrl+C will reboot immediately, which is the behavior when system is dumping core. In addition, I have successfully obtained crashdump. The backtrace itself seemed to be meaningless. I thought there might be some locking problem within the shutdown code. I will do some experiments after my competitive examination for bachelor's degree tomorrow. > > The system used to crash before sync'ing disks. It seems that > > Nate's recent commit has removed that crash. More information > > available upon request. > > Exactly. 5.2.1-R and -CURRENT of late May were also tested, they were > crashing before syncing discs, 20040614 -CURRENT crashes (freeses) after > syncing. > > People say that on older P4 CPUs (Northwood core) that do not have this > problem, only on `E'-s (??? Strange enough). Exactly. The P4 box at my lab does work correctly. Let's check the developers' manual from Intel and we may find something useful :-) Cheers, -- Xin LI <delphij frontfree net> http://www.delphij.net/ See complete headers for GPG key and other information.
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