6.2-PRERELEASE/amd64 boot kernel.gz failes

[Ruslan Ermilov]

On Wed, Sep 27, 2006 at 05:09:16PM +0300, Danny Braniss wrote:
> originally posted to amd64 at freebsd.org:
> 
> Hi,
> 	While trying to figure out why boot/pxeboot failes on some
> kernels/hosts, I think i've come up with one solid nogo,
> if the kernel is gzipped it always fails.
> 	Can someone confirm this? or am i suffering from some
> local problem?
> 
I can confirm this: RELENG_6 doesn't pxeboot when /boot/kernel/kernel
is gzipped.  In my case, it hangs just after loading a loader.conf file.
I've also verified that loading gzipped kernels/modules works on
7-CURRENT/i386.  So it's either loader vs. pxeboot issue (unlikely,
since pxeboot reuses the loader binary), or i386 vs. amd64 issue
(unlikely as well as amd64 reuses the i386 boot code), or more likely
because some changes were not MFCed.  Perhaps this one:

: sobomax     2005-12-19 09:00:11 UTC
: 
:   FreeBSD src repository
: 
:   Modified files:
:     sys/boot/i386/libi386 Makefile biosdisk.c biospnp.c biossmap.c 
:                           i386_copy.c 
:   Log:
:   Long-long time ago, when the trees were large and memory expensive amount of
:   memory directly available to loader(8) and friends was limited to 640K on i386.
:   Those times have passed long time ago and now loader(8) can directly access
:   up to 4GB of RAM at least theoretically. At the same time, there are several
:   places where it's assumed that malloc() will only allocate memory within
:   first megabyte.
:   
:   Remove that assumption by allocating appropriate bounce buffers for BIOS
:   calls on stack where necessary.
:   
:   This allows using memory above first megabyte for heap if necessary.
:   
:   Revision  Changes    Path
:   1.39      +3 -0      src/sys/boot/i386/libi386/Makefile
:   1.46      +10 -17    src/sys/boot/i386/libi386/biosdisk.c
:   1.10      +1 -1      src/sys/boot/i386/libi386/biospnp.c
:   1.4       +3 -2      src/sys/boot/i386/libi386/biossmap.c
:   1.11      +6 -22     src/sys/boot/i386/libi386/i386_copy.c

I'll narrow this down tomorrow if noone bites me while I sleep.  :-)


Cheers,
-- 
Ruslan Ermilov
ru at FreeBSD.org
FreeBSD committer
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