Date: Thu, 19 Oct 1995 10:31:31 +0000 () From: Nik Clayton <nik@blueberry.co.uk> To: questions@freebsd.org Subject: /kernel: Null pmap (cb) at va: 0x0 Message-ID: <199510191031.KAA00330@elbereth.blueberry.co.uk>
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Hi folks, While running 2.0.5, on a Pentium with a (thought to be) dodgy chip cache, I was in the middle a lightly loaded X session (3 xterms, running 2 shells and a copy of elm) when I tried to run Netscape 1.12. X then promptly died on me, Looking /var/log/messages I see Oct 19 10:00:01 elbereth /kernel: Null pmap (tb) at va: 0x0 Oct 19 10:00:01 elbereth last message repeated 6 times Oct 19 10:00:01 elbereth /kernel: Null pmap (cb) at va: 0x0 Oct 19 10:00:01 elbereth /kernel: Null pmap (tb) at va: 0x0 Oct 19 10:00:01 elbereth last message repeated 8 times Oct 19 10:00:01 elbereth /kernel: Null pmap (cb) at va: 0x0 Oct 19 10:00:01 elbereth /kernel: Null pmap (tb) at va: 0x0 I have never seen this before, and I've been running 2.0.5 since about a week after it's release. Messages of that form appear in `messages' from 10:00:00 this morning (I first logged in at 9:50) and continue until I rebooted the system at 10:10:27. My X system didn't disappear until 10:09, with the following entries Oct 19 10:09:08 elbereth /kernel: pid 912: xterm: uid 0: exited on signal 11 Oct 19 10:09:08 elbereth /kernel: pid 896: xclock: uid 1000: exited on signal 11 Oct 19 10:09:08 elbereth /kernel: pid 905: xterm: uid 0: exited on signal 11 Oct 19 10:09:08 elbereth /kernel: pid 897: xload: uid 1000: exited on signal 11 Oct 19 10:09:08 elbereth /kernel: pid 890: xterm: uid 0: exited on signal 11 Oct 19 10:09:08 elbereth /kernel: pid 898: xterm: uid 0: exited on signal 11 A quick grep "Null pmap" /var/log/messages* shows that this is the first time these errors have occured since Aug 26 (as far back as my logs go). The machine was last rebooted at 18:47 yesterday, so it's not like there'd been a fantastically long uptime. Suspicious that this happened at exactly 10:00 I thought maybe something kicked off by cron caused it. But in /var/cron/log there is just Oct 19 10:00:00 elbereth CRON[978]: (root) CMD (/usr/libexec/atrun) root (10/19-10:05:00-982) CMD (/usr/libexec/atrun) which looks fairly standard to me. So, cosmic rays, or something more important? N -- --+=[ Blueberry Hill Blueberry Design ]=+-- --+=[ http://www.blueberry.co.uk/ 1/9 Chelsea Harbour Design Centre, ]=+-- --+=[ WebMaster@blueberry.co.uk London, England, SW10 0XE ]=+--
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