A full answer follows soon, but in essence you got it :) I will be working on the 4.1 version today, thus the brief reply ;)
> -----Original Message----- > From: [email protected] [mailto:rsyslog- > [email protected]] On Behalf Of [email protected] > Sent: Thursday, January 29, 2009 12:06 PM > To: rsyslog-users > Subject: Re: [rsyslog] rsyslog still crashes > > On Thu, 29 Jan 2009, Rainer Gerhards wrote: > > > Hi all, > > > > I had another interesting discussion with Lorenzo today. Those of you > > interested in details my find the chatlog interesting: > > > > http://blog.gerhards.net/2009/01/some-more-on-rsyslog-data-race.html > > so, distilling this down I think I am reading the following. > > 1. mixing mutex and atomic operations is a problem, one or the other is > safe > > 2. reliable duplication of the problem requires > > fast machine > multiple cores _not_ sharing L1 cache (early Intel 4-core machines or > multi-socket machines) > a complex rsyslog config that uses multiple thread heavily > high traffic log volume to heavily load rsyslog > high system load external to rsyslog increases the chancesof the race > > question, have you tried enabling/disabling preemption in the kernel on > these systems to see if that affects the probability of having a > problem? > > I'm eagerly waiting for the fixes to appear in the 4.1 branch to test > them > out. > > David Lang > > > > Rainer > > > >> -----Original Message----- > >> From: [email protected] [mailto:rsyslog- > >> [email protected]] On Behalf Of Rainer Gerhards > >> Sent: Wednesday, January 28, 2009 6:32 PM > >> To: rsyslog-users > >> Subject: Re: [rsyslog] rsyslog still crashes > >> > >> Hi all, > >> > >> thanks to Lorenzo's help, we made good progress. It is too much to > > post > >> inside a mail, please have a look at my analysis of the bug: > >> > >> http://blog.gerhards.net/2009/01/rsyslog-data-race-analysis.html > >> > >> The short story is that we have at least improved the situation very > >> much and I hope to have fixes for all branches within the next > couple > >> of > >> days. > >> > >> Rainer > >> > >>> -----Original Message----- > >>> From: [email protected] [mailto:rsyslog- > >>> [email protected]] On Behalf Of Rainer Gerhards > >>> Sent: Friday, January 16, 2009 3:22 PM > >>> To: rsyslog-users > >>> Subject: Re: [rsyslog] rsyslog still crashes > >>> > >>> Lorenzo, > >>> > >>> I have created a new branch "raceDebug" and done a first commit to > >> it. > >>> The change is very lightweight. Please pull, compile as usual and > >> give > >>> it a try. It spits out some info to stdout from time to time > >>> (hopefully). I am not sure if it aborts, depending on the output it > >> may > >>> or may not. Even if we get messages, they are probably not enough > to > >>> pinpoint the bug, but I wanted to do something very light to see if > >> the > >>> bug stays. > >>> > >>> Feedback appreciated. > >>> > >>> Rainer > >> _______________________________________________ > >> rsyslog mailing list > >> http://lists.adiscon.net/mailman/listinfo/rsyslog > >> http://www.rsyslog.com > > _______________________________________________ > > rsyslog mailing list > > http://lists.adiscon.net/mailman/listinfo/rsyslog > > http://www.rsyslog.com > > > _______________________________________________ > rsyslog mailing list > http://lists.adiscon.net/mailman/listinfo/rsyslog > http://www.rsyslog.com _______________________________________________ rsyslog mailing list http://lists.adiscon.net/mailman/listinfo/rsyslog http://www.rsyslog.com
