Re: [Qemu-devel] Re: 2.6.10-mm3: swsusp: out of memory on resume

[Fabrice Bellard <fabrice@bellard.org>]

hugang@soulinfo.com wrote:
> On Sat, Jan 15, 2005 at 12:42:35AM +0100, Rafael J. Wysocki wrote:
> 
>>On Friday, 14 of January 2005 15:34, you wrote:
>>
>>>On Thu, Jan 13, 2005 at 07:09:24PM +0100, Rafael J. Wysocki wrote:
>>>
>>>>Hi,
>>>>
>>>>
>>>>Has this patch been ported to x86_64?  Or is there a newer version of it anywhere,
>>>>or an alternative?
>>>>
>>>
>>>Ok, Here is a new patch with x86_64 support, But I have not machine, So
>>>Need someone test it. 
>>>
>>>2.6.11-rc1-mm1 
>>> -> 2005-1-14.core.diff 	core patch		TEST PASSED
>>>  -> 2005-1-14.x86_64.diff	x86_64 patch	NOT TESTED
>>
>>Unfortunately, on x86_64 it goes south on suspend, probably somwhere in write_pagedir(),
>>but I'm not quite sure as I can't make it print any useful stuff to the serial console
>>(everything is dumped to a virtual tty only).  Seemingly, it prints some
>>"write_pagedir: ..." debug messages and then starts to print garbage in
>>an infinite loop.
> 
> 
> Try enable debug in swsusp, 
> <....>
> #include "power.h"
> #undef pr_debug
> #define pr_debug printk
> <....>
> 
>  Enable serial conosole, 
>  Adding console=ttyS0 in boot command line.
> 
> Then do software suspend, And send the log to me, that will useful. 
> 
> For other reference, I using qemu As X86-64 emulation, But current qemu
> X86-64 not full works, the kernel hang after copy_page in suspend, I'll
> enable CPU and ASM log in qemu to finger other where is the problem.

I recently made a fix in fxsave/fxrestor which may correct some issues 
on x86_64. Strangely, the CVS commit mail did not appear on the mailing 
list...

The state of x86_64 is that the install of Fedora core 3 for x86_64 
begins to work (you can select the language for example), but there are 
some invalid characters displayed on screen. I believe there is a sign 
extension problem in a 64 bit instruction.

Now that SSE and MMX are implemented, no feature is lacking in the QEMU 
x86_64 emulation... "just" a problem of debugging now :-)

I did not enable SSE and MMX for x86 because I fear there are still bugs 
which may cause regressions. Interested people can enable the line:

--
      env->cpuid_features |= CPUID_FXSR | CPUID_MMX | CPUID_SSE | 
CPUID_SSE2 | CPUID_PAE;
--

and see if their OS and application still work.

Fabrice.