Re: [coLinux-devel] CoLinux and Virtual PC

[Henry N. <Hen...@Ar...>]

Kasprzyk, Nico wrote:
> Some days before, I tried to run CoLinux 0.8.0 in one Virtual PC Windows
> XP session. Short summary: It did not work. It is not possible for me to
> judge whether CoLinux may be corrected to run in Virtual PC or if this
> is one real serious problem.
> 
> Thus, i ask the list: Do you think that it will be possible to run
> CoLinux with Virtual PC?
> 
> 
> Best regards,
> 
> Nico
> 
> 
> An older version did not run with error:
> ========================================
> 
> Cooperative Linux Daemon, 0.8.0
> Daemon compiled on Sun Jan 20 19:01:26 2008
> 
> PID: 2316
> colinux: booting
> Linux version 2.6.22-co-0.8.0 (hn@hn-dt) (gcc version 4.2.1 (SUSE
> Linux)) #1 PRE
> EMPT Sun Jan 20 18:59:42 CET 2008
> 128MB LOWMEM available.
> initrd enabled: start: 0xc7f9a000  size: 0x00065881
> [...]
> Calibrating delay loop... WARNING: at
> /home/hn/colinux/build/devel-gcc412/linux-2.6.22-source/kernel/softirq.c:122 _local_bh_enable()

This ia a line with:
        WARN_ON_ONCE(!irqs_disabled());

>  [<c0103b7a>] show_trace_log_lvl+0x1a/0x30
>  [<c0103cb2>] show_trace+0x12/0x20
>  [<c0104ae5>] dump_stack+0x15/0x20
>  [<c0115cfa>] _local_bh_enable+0x9a/0xb0
>  [<c0115d9a>] __do_softirq+0x8a/0xa0
>  [<c0115de5>] do_softirq+0x35/0x40
>  [<c0116053>] irq_exit+0x43/0x50
>  [<c013d154>] co_callback+0x164/0x2f0
>  [<c010a681>] proxy_interrupt_handler+0x41/0x50
>  [<c0103873>] common_interrupt+0x23/0x30
>  [<c0396b65>] start_kernel+0x1c5/0x2b0
>  [<00000000>] _stext+0x3fefff50/0x20
>  [<c010a30e>] co_start_arch+0xfe/0x170
>  [<c0109e95>] co_arch_start_kernel+0x0/0xb
>  =======================
> colinux: Linux VM terminated
> colinux: BUG at
> ...vel-gcc412/linux-2.6.22-source/kernel/posix-cpu-timers.c:1295

This is the line
        BUG_ON(!irqs_disabled());

Think, we can fix it. Our timer callback leaks somethere with enabled
interrupts. I'm afraid.

As workarround set loops_per_jiffy manualy as kernelparameter and skip
the calibration: "lpj=3000000" (see kernel source
Documentation/kernel-parameters.txt:910)

We currently have kernel 2.6.22.18 and some changes on the proxy
interrupt handler. Please give the latest snapshot a try. If that also
fails, then send please the new stack trace again.

> A newer version stopped working with:
> =====================================
> 
> Cooperative Linux Daemon, 0.8.0
> Daemon compiled on Tue May 13 04:06:17 2008
> 
> daemon: exit code 83279001
> daemon: error - CO_RC_ERROR_ERROR, line 484, file
> src/colinux/user/daemon.c (25)

The driver is not loaded correctly.
First, please run this and send me your result:
* cd C:\colinux
* colinux-daemon --status-driver

To fix it, please do follow steps
* cd C:\colinux
* colinux-daemon --remove-driver
* colinux-daemon --install-driver
* colinux-daemon --status-driver

If that not helps, then reboot windows between remove and install.

-- 
Henry N.