On Wed, Dec 14, 2016 at 11:49:26AM -0800, Steven G. Kargl wrote: > Well, after 3 days of bisection, I finally found the commit > that renders my system unbootable. The system does not panic. > It simply gets stuck in some state. Nonfunctional keyboard, > so can't break into debugger. No serial console available. > The verbose dmesg.boot for a working kernel from revision > 309656 is at > > http://troutmask.apl.washington.edu/~kargl/freebsd/dmesg.309656.txt > > The kernel config file is at > > http://troutmask.apl.washington.edu/~kargl/freebsd/SPEW.txt > > In looking at /usr/src/UPDATING, there is no warning that one > can create a boat anchor by upgrading to 309657. If compiling > a kernel with 'options DDB' is no longer supported, this should > be stated in UPDATING. Or, UPDATING should state that 'options > DDB' requires 'options STACK'. Or, 'options DDB' should simply > to the right thing and pull in whatever 'option STACK' does. It is supported though - the point of that change was to fix a problem that occurred when DDB is configured but STACK isn't. While testing I tried every combination of the two options, and I just tried and successfully booted a kernel with DDB and !STACK. Does the kernel boot successfully if STACK is added to your configuration?Received on Wed Dec 14 2016 - 19:08:06 UTC
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