Re: How to build smp kernel
On 11/11/2007, Feng Xian <feng.xian(a)gmail.com> wrote:
But the final image file is vmlinuz-2.6.23, not vmlinuz-2.6.23smp.
Is
this final image a real smp kernel? If not, do i need to apply
patches. Thanks!
Actually, these days, the kernel can autodetect at boot if it is
running on an SMP system and activate support for it automatically.
For instance here's a snippet from the fedora 8 kernel
2.6.23.1-42.fc8:
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 4096K
CPU 0/0 -> Node 0
using mwait in idle threads.
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 0
CPU0: Thermal monitoring enabled (TM2)
SMP alternatives: switching to UP code
ACPI: Core revision 20070126
Using local APIC timer interrupts.
APIC timer calibration result 12465172
Detected 12.465 MHz APIC timer.
SMP alternatives: switching to SMP code
Booting processor 1/2 APIC 0x1
Initializing CPU#1
Calibrating delay using timer specific routine.. 3988.84 BogoMIPS (lpj=1994422)
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 4096K
CPU 1/1 -> Node 0
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 1
CPU1: Thermal monitoring enabled (TM2)
Intel(R) Core(TM)2 Duo CPU T7300 @ 2.00GHz stepping 0a
Brought up 2 CPUs
So, there, as you can see ther kernle is pretty smart nowadays. Also
check the release notes:
http://docs.fedoraproject.org/release-notes/f8/en_US/sn-Kernel.html#sn-Ke...
Good luck,
Rui