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List:       linux-arm-kernel
Subject:    Re: Arm linux software suspend
From:       junjie cai <junjiec () gmail ! com>
Date:       2005-08-09 9:24:39
Message-ID: ca992f1105080902242975abb8 () mail ! gmail ! com
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hi,
maybe you could try a dummy application as i did,
if it failed neither, then there may be something wrong with
the storager driver.

according to your OOPS messages, 
it failed to access 0x8000_XXXX 
which is not a address in the kernel space.
does the OOPS exactly the same 
for example in the same function, accessing same address
or just randomly?

below is my dummy test program.

thanks

#include <stdio.h>
#include <sys/mman.h>

int main(void){
	char *buf=mmap(NULL,
		       1024*1024*8,
		       PROT_WRITE | PROT_READ,
		       MAP_PRIVATE | MAP_ANONYMOUS,
		       -1,
		       0
		);

	if(buf == MAP_FAILED){
		perror("mmap");
		return -1;
	}

	printf("start: %8lX\n", buf);
	memset(buf,'A',1024*1024*8);
	{	
		int i=0;
		while(1){
			for(i=0;i<1024*1024*8;i++){
				sleep(10);
				printf("%c\n",buf[i]);
			}
		}
	}
}


On 8/9/05, Hiroki Kaminaga <kaminaga@sm.sony.co.jp> wrote:
> From: junjie cai <junjiec@gmail.com>
> Subject: Re: Arm linux software suspend
> Date: Tue, 9 Aug 2005 16:00:28 +0900
> 
> > hi,
> > you mentioned that when the image got bigger(above 2000 page?),
> > the resume failed even in simple case,
> > so just for curious ,i wrote a dummy application allocationg 8M memory
> > and printing, then do suspend-to-disk. after disabling free_some_memory,
> > the image is about 4200 pages and it worked just fine.
> >
> > FYI, i did the test in a
> >  2.6.10 kernel
> >     +
> >   swap partition on IDE
> >     +
> >    root fs on NFS
> >     +
> >   my local patches.
> 
> 
> I tried your patch.
> 
> It works on simple case, but still, I get same kernel panic when
> I do software suspend while playing mplayer.
> 
> My boardf is omap_osk_5912, and does not have HDD, and thus using
> flash as swap.
> 
>   2.6.11 kernel
>     +
>   swap partition on flash
>     +
>   root fs on NFS
>     +
>   your patch
> 
> Maybe I might try using swap on USB mass storage.
> 
> 
> HK.
> --
>

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