Re: Continuing saga: FreeBSD -CURRENT hangs with ATA code after April

Joe Marcus Clarke wrote:
> I started this thread on May 31 of last year:
> 
> http://lists.freebsd.org/pipermail/freebsd-current/2008-May/085923.html
> 
> The problem remains as of:
> 
> FreeBSD fugu.marcuscom.com 8.0-CURRENT FreeBSD 8.0-CURRENT #12: Sun Mar
> 1 16:10:52 EST 2009
> gnome_at_fugu.marcuscom.com:/space/obj/usr/src/sys/FUGU  i386
> 
> The only way I can boot this system is to hack in the ATA code from
> April 9, 2008.  I would love just to be able to boot this guy on a
> default -CURRENT.

1) If I understand right, you had working system on April 9, 2008 and 
not working on May 31, 2008 and now. Have you tried to narrow down that 
interval between working and not working system to find exact point of 
breakage? I see no documented changes in Promise support there in CVS 
log, but for example, on Apr 10 2008 I see some related changes 
unmentioned in commit message.

2) To properly associate problem with present sources I would like to 
see full problem verbose messages for the current HEAD.

3) As my mom told me 15 years ago, if you don't understand what's going 
on, insert debugging printfs. If system hangs and we have no other 
sources of information, I would start from putting
	printf("%s\n", __func__);
wherever it is possible to get readable path. I would start from every 
ata_promise_mio_* function beginning of HEAD code.

-- 
Alexander Motin