6.2-PRERELEASE/amd64 boot kernel.gz failes

[Danny Braniss]

> 
> --3uo+9/B/ebqu+fSQ
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> On Wed, Sep 27, 2006 at 05:09:16PM +0300, Danny Braniss wrote:
> > originally posted to amd64 at freebsd.org:
> >=20
> > 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?
> >=20
> 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
> :=20
> :   FreeBSD src repository
> :=20
> :   Modified files:
> :     sys/boot/i386/libi386 Makefile biosdisk.c biospnp.c biossmap.c=20
> :                           i386_copy.c=20
> :   Log:
> :   Long-long time ago, when the trees were large and memory expensive amou=
> nt 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 ac=
> cess
> :   up to 4GB of RAM at least theoretically. At the same time, there are se=
> veral
> :   places where it's assumed that malloc() will only allocate memory within
> :   first megabyte.
> :  =20
> :   Remove that assumption by allocating appropriate bounce buffers for BIOS
> :   calls on stack where necessary.
> :  =20
> :   This allows using memory above first megabyte for heap if necessary.
> :  =20
> :   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.  :-)

THANKS!
	I was begining to climb walls here, let me know when i can test
it!

	danny