GIANT_LOCK in release7.0

[Alexander K. Beros]

I have not been able to find any discussion of the following issue.  Ever
since I upgraded to release 7.0, whenever I print to my network printer (I
am using Samba) I get the following output to ttyv0:

lpt0: [GIANT-LOCKED]
lpt0: [ITHREAD]
lpt0: [GIANT-LOCKED]
lpt0: [ITHREAD]
lpt0: [GIANT-LOCKED]
lpt0: [ITHREAD]
lpt0: [GIANT-LOCKED]
lpt0: [ITHREAD]
lpt0: [GIANT-LOCKED]
lpt0: [ITHREAD]

	... this can continue for a very long time depending on the size of the
queue

The actual printing is fine, and since I am rarely at the terminal it isn't
a serious problem.  In fact, if I am working at the server and someone else
is sending jobs to the printer I switch over to ttyv1, so there is really no
inconvenience.

On the other hand, I thought that release 7 is GIANT_LOCK free, so this is
rather unexpected.  I would appreciate any information or explanation.

In the printout below, you will note SMALLKERNEL7, this is just a paring
down of the generic kernel to tailor it to my system.  The behaviour I
discuss above occurs with the default kernel as well.

Thanks in advance and best regards,
Alex Beros

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FreeBSD 7.0-RELEASE #0: Wed Nov 12 14:10:45 PST 2008
    z_9-hodjA at hephaestus.TheForge:/usr/obj/usr/src/sys/SMALLKERNEL7
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel Pentium III (730.90-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x683  Stepping = 3
  Features=0x383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMO
V,PAT,PSE36,MMX,FXSR,SSE>
real memory  = 469499904 (447 MB)
avail memory = 449888256 (429 MB)
kbd1 at kbdmux0
acpi0: <GATEWA EA81510A> on motherboard
acpi0: [ITHREAD]
acpi0: Power Button (fixed)
acpi0: reservation of 0, a0000 (3) failed
acpi0: reservation of 100000, 1bf00000 (3) failed
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
cpu0: <ACPI CPU> on acpi0
acpi_button0: <Sleep Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
agp0: <Intel 82815 (i815 GMCH) host to PCI bridge> on hostb0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci2: <PCI bus> on pcib1