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Path: sserve!manuel!munnari.oz.au!uunet!olivea!decwrl!access.usask.ca!regina!udevdiv!roe From: roe@Unibase.SK.CA (Roe Peterson) Newsgroups: comp.unix.bsd Subject: mysterious system hangups Message-ID: <1992Aug4.175738.7008@Unibase.SK.CA> Date: 4 Aug 92 17:57:38 GMT Organization: Unibase Telecom Ltd. Lines: 26 This is in relation to the many reports of mysterious system hangups during heavy disk load. Summary: - regardless of disk controller, heavy disk access (ie: extract, kernel rebuild, libc.a rebuild) seems to cause system lockups at unpredictable intervals. - sync() still seems to be running, as no file-system damage occurs after a reset. - interrupts seem to work (keyboard LEDs still respond, character echo still works, telnet connects, but no login process appears). - amount of memory and swap space appear to have nothing to do with the problem (despite previous theories posted by yours truly). - occasionally, rather than a hangup, a "panic: kmem_malloc: kern_map too small" happens. - running manual sync commands during such disk activity seems to make things work better. I've finally had my system stay up long enough to compile a debug version of the kernel, and a different thing happens: I get a "panic: remrq" Is anyone out there familiar enough with BSD to tell me if this problem could be related to the sync daemon?