Messages in this thread |  | | From | "Simen Timian Thoresen" <> | Date | Wed, 1 Nov 2000 10:29:42 +0100 | Subject | Re: SMP freeze in <= 2.2.17 when toggling consoles |
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> Recently while trying to pin down SCSI errors with a Dual PII machine with > onboard SCSI I discovered a nasty and easily repeatable way to cause a > total system freeze. > > Tyan Thunder 100 M/B > 256MB ram > 2x PII-233 (klamath core) > Onboard dual channel AIC-7895 (aic7xxx driver built into the kernel) > Onboard eepro100 compatible ethernet. > 2x Seagate ST34501W, 4GB, 10,000rpm drives
Ok, our system is Epox KP6-BS, (Also a dual 440BX) 256MB ram 2x PIII-750MHz Coppermine Adaptec AHA-294X Ultra SCSI host adapter (Ultra Wide) 2x Kingston K110TX (Lite on tulip) nics 1x 20MB/s raid unit.
> The symptom is basically this - under heavy disk activity, rapidly > switching virtual consoles will trigger a system freeze. Nothing will > revive the machine, the Magic Sysreq key is also inoperable. Generally I > can get it to freeze within a couple of seconds. If I just switch consoles > slowly it doesnt seem to freeze, but holding down ALT and tapping > F1-F2-F1-F2 as quick as possible will freeze it in a few seconds. Quite > often it will even freeze right in the middle of redrawing the new console > - The top half of the screen will show part of the console you were > switching to, while the bottom is still showing the previous console > because it froze before it finished drawing the screen.
I've tried this a few times, but was unable to get the system to crash. I tried varying block-sizes and against both the ata-controller and the raid-box.
You might want to try to reproduce your problems with another scsi- controller, cable and disk comination, and also against an ide disk.
Good luck.
-Simen -- Simen Thoresen, Beowulf-cleaner and random artist.
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