Consistent file system hang with RELENG_6 of today ...
Marc G. Fournier
scrappy at hub.org
Fri Jul 29 03:22:46 GMT 2005
And now, to follow up on my original ... I now have two core dumps, if
anyone is interested :)
To give some details as to what I'm trying to do here, and how ...
I have a RELENG_6 machine, updated this afternoon, that I am trying to run
a 4.x based jail environment on ... and these are what are live/running
on my 6 productions 4.x machines right now ...
I have COMPAT_FREEBSD4 built into the kernel:
> strings /boot/kernel/kernel | grep -i COMPAT_ | grep __options
___options COMPAT_43 #Compatible with BSD 4.3 [KEEP THIS!]
Now, as most of the "old timers" here know, my jail environment makes use
of unionfs to "mount" a template layer, to share common binaries amongst
the VMs ...
I have tried two different ways of doing this, both result in the exact
same 'file system hang' ... and I have a core of each 'method' ...
The first was to use mount_devfs to, of course, mount the /dev directory
within the jail itself ...
The second, I used the same /dev that existed within the jail, based on
bulding a jail using a 4.x system ...
In both cases, the hang appears to be at the same spot, where 'sendmail'
(in this case, the postfix port) starts up ...
In both cases, I was able to enter DDB using CTL-ALT-ESC and create a
dump, but, unlike a server crash, where you just basically bt the core
file, I really haven't got a clue where to even start to provide
information from the core's themselves ...
So, is there anyone out there able/willing to provide some direction on
providing more information?
On Thu, 28 Jul 2005, Marc G. Fournier wrote:
> 'k, I'm starting to play with 6.x, for our new server ... my priority right
> now is to just have it run the existing 'jail' environments from my 4.x
> machine, while I work on getting all of our servers up to 6.x, and then will
> worry about the jail's themselves ...
> When I try and startup the 4.x jail on my 6.x machine, it "hangs" the file
> system that the jail directory hierarchy happens to be mounted on though ...
> twice in a row so far ...
> Now, I'm suspecting (and am going to try without it) that it might be because
> I'm mounting devfs within the 4.x jail, but even then, it shouldn't hang
> things up, only generate a whack of errors ...
> I have a good dump (CTL-ALT-ESC -> panic), but do not have a clue what to
> offer from within there that might be of any use ...
> If anyone is interested ... ?
> thanks ...
> Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
> Email: scrappy at hub.org Yahoo!: yscrappy ICQ: 7615664
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email: scrappy at hub.org Yahoo!: yscrappy ICQ: 7615664
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