Re: Bug Hunting 101 - Finding The Alpha Bug

2005-12-29 Thread J.C. Roberts
On Tue, 27 Dec 2005 09:01:00 +0200, nikns [EMAIL PROTECTED] wrote: Upgraded alphastation to 3.8 and first time in my life hit alpha bug. ;) Kernel panicked while ungziping src.tar.gz. When I hit continue in ddb I was dropped into other panic. There is photos of panic, maybe it helps someone to

Re: Bug Hunting 101 - Finding The Alpha Bug

2005-12-29 Thread nikns
On Thu, Dec 29, 2005 at 01:51:34PM -0800, J.C. Roberts wrote: On Tue, 27 Dec 2005 09:01:00 +0200, nikns [EMAIL PROTECTED] wrote: Upgraded alphastation to 3.8 and first time in my life hit alpha bug. ;) Kernel panicked while ungziping src.tar.gz. When I hit continue in ddb I was dropped into other

Re: Bug Hunting 101 - Finding The Alpha Bug

2005-12-26 Thread nikns
Upgraded alphastation to 3.8 and first time in my life hit alpha bug. ;) Kernel panicked while ungziping src.tar.gz. When I hit continue in ddb I was dropped into other panic. There is photos of panic, maybe it helps someone to find alphabug :)) http://secure.lv/~nikns/alphabug/

Re: Bug Hunting 101 - Finding The Alpha Bug

2005-12-22 Thread J.C. Roberts
On Wed, 21 Dec 2005 12:13:54 -0800, J.C. Roberts [EMAIL PROTECTED] wrote: I found something interesting, namely a (more than once) reported bug that looks very similar to The alpha bug. The primary difference is you get cpu_switch_queuescan rather than cpu_switch in the trace output. 2003-10-01

Bug Hunting 101 - Finding The Alpha Bug

2005-12-21 Thread J.C. Roberts
Bug Hunting 101 - Finding The Alpha Bug I've been told that The alpha bug has been around for quite some time and no one has been able to find or fix it. I've also been told looking for this bug has driven a few developers to drink, well, probably drink more is a better description. Anyhow, since

Re: Bug Hunting 101 - Finding The Alpha Bug

2005-12-21 Thread Siegbert Marschall
Hi, As far as I can tell, the bug smells like a race condition of some sort and if my wild guess is correct, it will be difficult to reproduce consistently. With some (but not all) race conditions, you can increase the chance of triggering them by increasing loads. Since I want the race

Re: Bug Hunting 101 - Finding The Alpha Bug

2005-12-21 Thread J.C. Roberts
On Wed, 21 Dec 2005 22:46:00 +0100 (CET), Siegbert Marschall [EMAIL PROTECTED] wrote: Hi, As far as I can tell, the bug smells like a race condition of some sort and if my wild guess is correct, it will be difficult to reproduce consistently. With some (but not all) race conditions, you can

Re: Bug Hunting 101 - Finding The Alpha Bug

2005-12-21 Thread ober
I know this is going to be OT, but since this bug seems to deal with only OpenBSD on alpha, possibly in locore.s and does not seem to affect netbsd, that I might point out a coincidental, but most likely unrelated bug.