[coLinux-devel] [Colinux-RT]Is it possible to apply the rt patch to colinux kernel?

[Kaikuo Z. <zk...@cr...>]

I tried to use "SCHED_FIFO" pthreads in the colinux system ,and it seems to have some problems.


What I did is as follows:

download the kernel source "linux-2.6.33.7-source" and make using "make kernel" in the colinux source tree
download and apply the rt patch for 2.6.33.7: ftp://ftp.kernel.org/pub/linux/kernel/projects/rt/older/patch-2.6.33.7.
make menuconfig under "~/colinux-dev/build/linux-2.6.33.7-build" 
change some code to follow the RT's style, replace some functions, such as : replace something like compat_rw_sempaphore  and DECLARE_MUTEX 
and finally I get a kernel, but it crash immediately when I use to boot with a debian squeeze dist. and may last a few seconds and crash.

Does anyone know what happened?

Here is the crash log:
//////////////////////////////////////////////////////////////////////
I hope you have a fire-extinguisher handy!
__do_IRQ called for irq 0. PREEMPT_RT will crash your system soon
I hope you have a fire-extinguisher handy!
__do_IRQ called for irq 0. PREEMPT_RT will crash your system soon
I hope you have a fire-extinguisher handy!
__do_IRQ called for irq 0. PREEMPT_RT will crash your system soon
I hope you have a fire-extinguisher handy!
522.64 BogoMIPS (lpj=2613248)
Mount-cache hash table entries: 512
Performance Events: Core2 events, Intel PMU driver.
... version:                2
... bit width:              40
... generic registers:      2
... value mask:             000000ffffffffff
... max period:             000000007fffffff
... fixed-purpose events:   3
... event mask:             0000000700000003
CPU: Intel(R) Core(TM)2 Duo CPU     T7250  @ 2.00GHz stepping 0d
Checking 'hlt' instruction... __do_IRQ called for irq 0. PREEMPT_RT will crash y
our system soon
I hope you have a fire-extinguisher handy!
OK.
__do_IRQ called for irq 0. PREEMPT_RT will crash your system soon
I hope you have a fire-extinguisher handy!
__do_IRQ called for irq 0. PREEMPT_RT will crash your system soon
I hope you have a fire-extinguisher handy!
NET: Registered protocol family 16
colinux: Linux VM terminated
colinux: Kernel panic: Attempted to kill init!

D:\colinux>console: Monitor848: Detached

the .config I use is as follows:
diff .config linux-2.6.33.7-config
---------------------------------
3,4c3,4
< # Linux kernel version: 2.6.33.7-rt29
< # Sat Apr 23 03:15:56 2011
---
> # Linux kernel version: 2.6.33.7
> # Sun Feb  6 22:23:55 2011
23,24c23,24
< CONFIG_RWSEM_GENERIC_SPINLOCK=y
< CONFIG_ASM_SEMAPHORES=y
---
> # CONFIG_RWSEM_GENERIC_SPINLOCK is not set
> CONFIG_RWSEM_XCHGADD_ALGORITHM=y
80,84c80,81
< CONFIG_TREE_PREEMPT_RCU=y
< # CONFIG_TINY_RCU is not set
< # CONFIG_RCU_TRACE is not set
< CONFIG_RCU_FANOUT=32
< # CONFIG_RCU_FANOUT_EXACT is not set
---
> # CONFIG_TREE_PREEMPT_RCU is not set
> CONFIG_TINY_RCU=y
281,282d277
< # CONFIG_PREEMPT_DESKTOP is not set
< CONFIG_PREEMPT_RT=y
284,285d278
< CONFIG_PREEMPT_SOFTIRQS=y
< CONFIG_PREEMPT_HARDIRQS=y
363a357
> CONFIG_HAVE_ATOMIC_IOMAP=y
1228a1223
> # CONFIG_DEBUG_SHIRQ is not set
1240a1236
> # CONFIG_DEBUG_MUTEXES is not set
1261d1256
< CONFIG_RCU_CPU_STALL_DETECTOR=y