[FIXED] ATAPI CD boot problems

[Nate Lawson]

Søren Schmidt wrote:
>> On Fri, Jul 02, 2004 at 10:58:59AM -0700, Nate Lawson wrote:
>>> That's because the bug is still there.  Stick a call to "if (addr ==
>>> 0xc1740a00) backtrace();" in kern_malloc and you'll see the original
>>> allocator was ATA.  The problem is with ATA's handling of drives 
>>> where you
>>> get the message "identify timed out".  To work around, boot without your
>>> cdrom drive in the drive bay.  This bug is extremely annoying and has
>>> forced me to install via floppy in the past.
>>>
>>> The reason you don't see this in a custom kernel is the check for memory
>>> use after free happens only with options INVARIANTS.  The bug is still
>>> there, just ignored.
>>>
>>> I may get around to tracking this down sometime in the future but don't
>>> count on it.
>
> Yeps, some good precise debugging of this problem would be appreciated, 
> I can't seem to reproduce it here no matter what I try :(

Just to close off this thread, I found the problems and posted a patch 
including debugging info to -current.

-Nate