mrapple@quack.UUCP (Nick Sayer) (08/09/90)
I have noticed that every once in a while uucico decides to hang. Well, this isn't really a big problem. Just kill the uucico process, right? wrong. The process becomes a zombie with the notation "LBOLT" listed as the event the process is waiting for (as reported both by ps -axlw and sps -va). What is an lbolt and how do I "give it one" or kill the unkillable process? Note that bringing the carrier up on the modem does not work, and neither does sending any signal from 1 to 15. -- Nick Sayer | Disclaimer: ___ N6QQQ | "I ain't gonna touch it, / \ snap quack!mrapple@uop.edu | but the title alone |. .| x snap 209-952-5347 (Telebit) | gets two snaps up." ( o ) ||
chris@mimsy.umd.edu (Chris Torek) (08/13/90)
In article <5442@quack.UUCP> mrapple@quack.UUCP (Nick Sayer) writes: >The process becomes a zombie with the notation "LBOLT" listed as the >event the process is waiting for (as reported both by ps -axlw and >sps -va). What is an lbolt and how do I "give it one" `lbolt' is the `lightning bolt' interrupt (shazam! :-) ), which occurs once per second (in V6 it may have been once every 4 seconds or 4 times a second; all I remember is that someone once mentioned that it changed between V6 and V7). Since the lightning bolt wakeup happens continually, it obviously is waiting for something else, and merely using lbolt as a convenient way to check periodically. (This is what lbolt is for.) >or kill the unkillable process? To dream... the impossible dream.... Oh, right. Well: >Note that bringing the carrier up on the modem does not work .. This probably means the answer is: `you can't'. (Hmm, more verses: `To play the unbeatable rogue/To kill the unkillable process/To hack where the guru won't go...' :-) ) -- In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163) Domain: chris@cs.umd.edu Path: uunet!mimsy!chris (New campus phone system, active sometime soon: +1 301 405 2750)
richard@aiai.ed.ac.uk (Richard Tobin) (08/14/90)
In article <25998@mimsy.umd.edu> chris@mimsy.umd.edu (Chris Torek) writes: >`lbolt' is the `lightning bolt' interrupt (shazam! :-) ), which occurs >once per second (in V6 it may have been once every 4 seconds Yes: if((time[1]&03) == 0) { ... wakeup(&lbolt); } -- Richard -- Richard Tobin, JANET: R.Tobin@uk.ac.ed AI Applications Institute, ARPA: R.Tobin%uk.ac.ed@nsfnet-relay.ac.uk Edinburgh University. UUCP: ...!ukc!ed.ac.uk!R.Tobin