On Wed, May 19, 2004 at 11:12:09AM -0500, Craig Boston wrote: +> Just curoius if anybody has tried playing with swap over ggate? +> +> I thought I'd be clever and try to use it as a better workaround for the vinum +> swap problem... i.e. instead of running it through md(4) and a filesystem, +> do something like: +> +> ggatel create /dev/vinum/swap +> swapon /dev/ggate0 +> +> That seemed to attach just fine. However, doing something like +> +> dd if=/dev/zero of=/dev/null bs=256m count=2 +> +> to provoke some swapping caused the system to freeze. It was kind of weird +> for a minute -- I could still ping it and switch windows in screen, but the +> shell wouldn't respond to any commands. Eventually it stopped responding to +> pings altogether and the ssh connection died. Seemed like a VM deadlock, but +> unfortunately I was remote at the time and couldn't try to break in to DDB at +> the console. +> +> Funny thing was that after a reboot I did the same thing and it worked fine. +> If I'm able to reproduce the freeze again I'll try to get ps and backtrace +> and all that good stuff. The biggest problem in your situation is that ggatel(8) works as a userland process and I think there is a 100% deadlock when system is trying to swap ggatel process out. -- Pawel Jakub Dawidek http://www.FreeBSD.org pjd_at_FreeBSD.org http://garage.freebsd.pl FreeBSD committer Am I Evil? Yes, I Am!
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